Bibliographies thématiques / Mn-catalyzed

Littérature scientifique sur le sujet « Mn-catalyzed »

Auteur : Grafiati
Publié le 11 mars 2023

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Articles de revues sur le sujet "Mn-catalyzed"

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WHELAN, GENE, et RONALD C. SIMS. « Mn-Catalyzed Oxidation of Naphthalenediol ». Hazardous Waste and Hazardous Materials 12, no 4 (janvier 1995) : 381–94. http://dx.doi.org/10.1089/hwm.1995.12.381.

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Nishikori, Hisashi, et Tsutomu Katsuki. « Mn-salen catalyzed enantioselective sulfimidation ». Applied Catalysis A : General 194-195 (mars 2000) : 475–77. http://dx.doi.org/10.1016/s0926-860x(99)00393-2.

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Chen, Yuanjin, Tian Tian et Zhiping Li. « Mn-Catalyzed azidation–peroxidation of alkenes ». Organic Chemistry Frontiers 6, no 5 (2019) : 632–36. http://dx.doi.org/10.1039/c8qo01231h.

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Cozzi, P. « Mn-Catalyzed Reformatsky Reaction with Ketones ». Synfacts 2006, no 7 (juin 2006) : 0698. http://dx.doi.org/10.1055/s-2006-941862.

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Fu, Niankai, Yifan Shen, Anthony R. Allen, Lu Song, Atsushi Ozaki et Song Lin. « Mn-Catalyzed Electrochemical Chloroalkylation of Alkenes ». ACS Catalysis 9, no 1 (5 décembre 2018) : 746–54. http://dx.doi.org/10.1021/acscatal.8b03209.

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Rehman, S., M. Hafeez, U. Manzoor, M. A. Khan et A. S. Bhatti. « Competitive role of Mn diffusion with growth in Mn catalyzed nanostructures ». Journal of Applied Physics 111, no 8 (15 avril 2012) : 084301. http://dx.doi.org/10.1063/1.3702881.

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Osipova, Elena S., Ekaterina S. Gulyaeva, Nikolay V. Kireev, Sergey A. Kovalenko, Christian Bijani, Yves Canac, Dmitry A. Valyaev, Oleg A. Filippov, Natalia V. Belkova et Elena S. Shubina. « Fac-to-mer isomerization triggers hydride transfer from Mn(i) complex fac-[(dppm)Mn(CO)3H] ». Chemical Communications 58, no 32 (2022) : 5017–20. http://dx.doi.org/10.1039/d2cc00999d.

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Schmidt et Husted. « The Biochemical Properties of Manganese in Plants ». Plants 8, no 10 (27 septembre 2019) : 381. http://dx.doi.org/10.3390/plants8100381.

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Manganese (Mn) is an essential micronutrient with many functional roles in plant metabolism. Manganese acts as an activator and co-factor of hundreds of metalloenzymes in plants. Because of its ability to readily change oxidation state in biological systems, Mn plays and important role in a broad range of enzyme-catalyzed reactions, including redox reactions, phosphorylation, decarboxylation, and hydrolysis. Manganese(II) is the prevalent oxidation state of Mn in plants and exhibits fast ligand exchange kinetics, which means that Mn can often be substituted by other metal ions, such as Mg(II), which has similar ion characteristics and requirements to the ligand environment of the metal binding sites. Knowledge of the molecular mechanisms catalyzed by Mn and regulation of Mn insertion into the active site of Mn-dependent enzymes, in the presence of other metals, is gradually evolving. This review presents an overview of the chemistry and biochemistry of Mn in plants, including an updated list of known Mn-dependent enzymes, together with enzymes where Mn has been shown to exchange with other metal ions. Furthermore, the current knowledge of the structure and functional role of the three most well characterized Mn-containing metalloenzymes in plants; the oxygen evolving complex of photosystem II, Mn superoxide dismutase, and oxalate oxidase is summarized.
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Zhang, Liang, Shuya Liu, Zhiguo Zhao, Hongmei Su, Jingcheng Hao et Yao Wang. « (Salen)Mn(iii)-catalyzed chemoselective acylazidation of olefins ». Chemical Science 9, no 28 (2018) : 6085–90. http://dx.doi.org/10.1039/c8sc01882k.

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Wang, Congyang, et Ting Liu. « Manganese-Catalyzed C(sp2)–H Addition to Polar Unsaturated Bonds ». Synlett 32, no 13 (27 mars 2021) : 1323–29. http://dx.doi.org/10.1055/a-1468-6136.

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AbstractTransition-metal-catalyzed nucleophilic C–H addition of hydrocarbons to polar unsaturated bonds could intrinsically avoid prefunctionalization of substrates and formation of waste byproducts, thus featuring high step- and atom-economy. As the third most abundant transition metal, manganese-catalyzed C–H addition to polar unsaturated bonds remains challenging, partially due to the difficulty in building a closed catalytic cycle of manganese. In the past few years, we have developed manganese catalysis to enable the sp2-hydrid C–H addition to polar unsaturated bonds (e.g., imines, aldehydes, nitriles), which will be discussed in this personal account.1 Introduction2 Mn-Catalyzed N-Directed C(sp2)–H Addition to Polar Unsaturated Bonds3 Mn-Catalyzed O-Directed C(sp2)–H Addition to Polar Unsaturated Bonds4 Conclusion
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Thèses sur le sujet "Mn-catalyzed"

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Pietikäinen, Pekka. « Mn-salen catalyzed asymmetric epoxidation : search for new oxidation systems ». Helsinki : University of Helsinki, 2001. http://ethesis.helsinki.fi/julkaisut/mat/kemia/vk/pietikainen/.

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Cui, Yu. « Delignification of Kraft-AQ Southern Pine Pulp with Hydrogen Peroxide Catalyzed by Mn(IV)2-Me4DTNE ». NCSU, 2000. http://www.lib.ncsu.edu/theses/available/etd-20000203-202106.

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Over the years, hydrogen peroxide has been used to improve the brightness of pulp at the end of a bleaching sequence. However, the degree of delignification achieved by a hydrogen peroxide stage is usually modest. That is because in alkaline condition the hydroperoxy anion reacts with chromophores in pulp as a nucleophile that does not oxidize residual lignin to a significant extent. In order to enhance the reactivity of hydrogen peroxide as an oxidant, a binuclear manganese complex Mn(IV)2-Me4DTNE was added. As a result, the degree of delignification was significantly improved, while at the same time, the strength properties of the pulp were better preserved compared traditional in hydrogen peroxide delignification. In order to better understand the mechanism of this delignification process, lignin model compound oxidation and kinetics of pulp delignification were studied. In addition, residual lignin was isolated from the pulp before and after delignification and then characterized by GPC, FTIR, and 1H-13C 2D NMR. Shown by the model compound study, hydrogen peroxide is able to oxidize 1-(3,4-dimethoxyphenyl)ethanol, E-diphenylethene, and 1-(3,4-dimethoxyphenyl)-1-propene to a considerable extent when catalyzed by Mn(IV)2-Me4DTNE, indicating that the reactivity of hydrogen peroxide as an oxidant is significantly improved. Indeed, as shown by the kinetic study of pulp delignification, the degree of delignification as well as the rate of delignification were greatly improved when the catalyst was applied. In addition, the catalyzed delignification process benefits from the concerted reaction mechanism that regulates the formation of hydroxyl radicals responsible for the severe damage to the fibers. As a result, the strength properties were well preserved. Shown by the characterization of residual lignin before and after the delignification, residual lignin was oxidized to a good extent which accounts for the significant degree of delignification. The process simulation of this catalyzed delignification process by WinGEMS4.0 showed that this process was profitable if the cost of the catalyst was kept below $330/kg.

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Jabeen, Fauzia. « III-V semiconducting nanowires by molecular beam epitaxy ». Doctoral thesis, Università degli studi di Trieste, 2009. http://hdl.handle.net/10077/3097.

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2007/2008
This thesis is devoted to the study of the growth of III-V nanowires (NWs) by catalyst assisted and catalyst free molecular beam epitaxy (MBE). The nanostructures have been routinely characterized by scanning electron microscopy (SEM) and, to a minor extent by transmission electron microscopy (TEM). X-ray photoemission spectroscopy (XPS), scanning photoemission microscopy (SPEM), extended X-ray absrorption fi ne structure analysis (EXAFS), photoluminescence (PL) and trans- port measurements have given an important contribution on specifi c topics. The first section of this thesis reports on GaAs, InAs, and InGaAs NWs growth by Au assisted MBE. A substrate treatment is proposed that improves uniformity in the NWS morphology. Thanks to a careful statistical analysis of the NWs shape and dimensions as a function of growth temperature and duration, evidence is found of radial growth of the NWs taking place together with the axial growth at the tip. This eff ect is interpreted in term of temperature dependent diff usion length of the cations on the NWs lateral surface. The control of the NWs radial growth allowed to grow core shell InGaAs/GaAs NWs, displaying superior optical quality. A new procedure is proposed to protect NWs surface from air exposure. This procedure allowed to perform ex-situ SPEM studies of electronic properties of the NWs. The second part of this thesis is devoted to Au-free NWs growth. GaAs and InAs NWs were successfully grown for the first time using Mn as catalyst. Incorporation of Mn in the NW is studied using EXAFS technique. It is shown that Mn atoms are incorporated in the body of GaAs NWs. Use of low growth temperature is suggested in order to improve the Mn incorporation inside GaAs NWs and obtain NWs with magnetic properties. Finally, growth of GaAs and InAs NWs on cleaved Si subtrate is demonstrated without the use of any outside metal catalyst. Two kinds of nanowires have been obtained. The experimental findings suggest that the two types of nanowires grow after di fferent growth processes.
Questa tesi e' dedicata allo studio della crescita di nanofili di semiconduttori III- V tramite epitassia da fasci molecolari (MBE) assistita da catalizzatore e senza l'uso di catalizzatori. Le nanostrutture sono state caratterizzate sistematicamente tramite microscopia elettronica a scansione (SEM), e in maniera minore microscopia elettronica in trasmissione (TEM). Altre tecniche come la spettroscopia di fotoemissione da raggi x (XPS), la microscopia da fotoemissione in scansione (SPEM), la spettroscopia di assorbimento x (in particolare la extended X-ray absorpition fine structure analysis (EXAFS)) la fotoluminescenza (PL), e il trasporto elettrico hanno dato importanti contributi su problematiche specifiche. La prima parte di questa tesi riguarda la crescita di nanofili di GaAs, InAs e InGaAs tramite MBE assistita da oro. Viene proposto un trattamento del substrato che migliora nettamente l'omogeneita' morfologica dei nanofili. Grazie ad un'attenta analisi statistica della forma e delle dimensioni dei nanofili in funzione della temperatura e del tempo di crescita e' stata dimostrata la crescita radiale dei nanofili, che avviene insieme alla crescita assiale che ha luogo alla punta del nanofilo. Le osservazioni sperimentali sono state interpretate in termini di dipendenza dalla temperatura della lunghezza di diffusione dei cationi sulle super ci laterali dei nanofili. Il controllo della crescita radiale ha permesso di crescere nanofili di InGaAs/GaAs core shell, costituiti cioe' da una anima centrale di InGaAs (core) e uno strato esterno di GaAs (shell) , che hanno dimostrato eccellente qualita' ottica. Viene quindi proposta una nuova procedura per proteggere la super ficie dei nanofili durante l'esposizione all'aria. Grazie a questa e' stato possibile realizzare ex-situ uno studio SPEM delle proprieta' elettroniche dei nanofili. La seconda parte della tesi riguarda la crescita di nanofili senza l'uso di oro. Viene per la prima volta dimostrata la possibilita' di crescere nanofili di GaAs e InAs usando il manganese come catalizzatore. L'incorporazione del Mn come impurezza nei nanofili e' stata studiata tramite EXAFS. Le misure hanno dimostrato che atomi di Mn sono effettivamente incorporate nel corpo dei nano fili. La crescita delle nanostrutture a temperatura piu' bassa potrebbe migliorare qualitativamente l'incorporazione del Mn e permettere la crescita di nanofili con proprieta' magnetiche. Viene in fine dimostrata la crescita di nanofili di GaAs e di InAs senza l'utilizzo di materiali diversi da quelli costituenti il semiconduttore. Tale risultato e' ottenuto su superfici sfaldate di silicio. Sono state osservate nanostrutture di due tipi, che sulla base dei dati sperimentali sembrano essere dovuti a due diversi meccanismi di crescita.
XXI Ciclo
1977
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Dewhirst, William Scott. « Mn(II) oxidation by HOCl in the presence of iron oxides : a catalyzing effect / ». Thesis, This resource online, 1997. http://scholar.lib.vt.edu/theses/available/etd-08252008-162202/.

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Wu, Pei-Jou, et 伍珮瑈. « Synthesis and Analysis of Mn-catalyzed Silicon Nanowires ». Thesis, 2018. http://ndltd.ncl.edu.tw/handle/t7b5a3.

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碩士
國立交通大學
電子物理系所
106
In this research, we studied the growth of silicon nanowires (SiNWs) with manganese (Mn) as catalyst by UHV-CVD. We explored the influence of the different growth parameters on the morphology and growth structure of the nanowires. In the process of tuning growth parameters, we found that the metal thickness directly affected the diameter of nanowire, and the precursor gas pressure immediately related to the growth rate of nanowires. We also showed that the growth temperature and initial condition of catalyst particle are key parameters for controlling structure morphology and growth orientation. We successfully achieved to control the growth of uniform nanowires along <111> direction during VSS growth. Therefore, we developed a novel process to fabricate different morphologies of Si nanostructure, denoted as wire, inclined and vertical. Further, we in-depth discussed these growth mechanisms in this investigation. Furthermore, we proved the single crystal of Si 1D structure during VSS growth, meanwhile the phases in the metal catalyst are confirmed as solid as s single-crystalline of tetragonal Mn4Si7 structure. Then we analyzed detailed epitaxial relations at the interfaces between the catalyst and silicon nanowire. On the other hand, the results showed that the obtained SiNWs were cone-like shape, which have the superior antireflective property characterized by UV–VIS-NIR.
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Hau-YuFang et 方浩羽. « Nickel-Catalyzed Cyclodimerization:Synthesis and Application of Annelated Dibenzo[de,mn]naphthacene derivatives ». Thesis, 2013. http://ndltd.ncl.edu.tw/handle/754jdw.

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碩士
國立成功大學
化學系碩博士班
101
Dibenzo[de,mn]naphthacene annelated derivatives has been generated by nickel-catalyzed cyclodimerization. These structure which has been comfirmed by X-ray single-crystal diffraction analysis is non-planar and twist angle about 43.8-66.6o. The bond length and bond alternation in the crystal structures and HOMA theoretical calculations reveal that the central two six-membered rings lack aromaticity. Systematic studies of reaction conditions reveal that nickel-catalyst, the amount of zinc powder, slovent and temperature all play key roles in this reaction. The reaction conditions have been optimized. Upon heating 1-bromo-(phenylethynyl)acene with mixture of NiBr2(dppe) and zinc powder in 1,4-dioxane at temperature between 130 to 150 ℃ for 14 hours, we generated 6 kinds of Dibenzo[de,mn]naphthacene annelated derivatives, the isolated yield is between 30% to 69%. These Dibenzo[de,mn]naphthacene annelated derivatives show similar perfermoce in oxidation-reduction potential as most PAHs compounds show. In optical physical properties, the maximum absorption wavelenth of these compound is between 551 nm to 647nm, which shows small HOMO-LUMO energy gap(1.81-2.12 eV).
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Chia-HuaChen et 陳家華. « Palladium-Catalyzed Cyclodimerization of 1-ethynyl-8-iodonaphthalenes : Synthesis of Dibenzo[de,mn]naphthacenes ». Thesis, 2010. http://ndltd.ncl.edu.tw/handle/39769201263241440938.

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碩士
國立成功大學
化學系碩博士班
98
7,14-diphenyldibenzo[de,mn]naphthacene (zethrene, 24a) has been generated by the Pd-catalyzed cyclodimerization which used silver carbonate, Ag2CO3, and tris(furan-2-yl)phosphine, P(2-furyl)3 as cocatalyst. This structure which has been comfirmed by X-ray single-crystal diffraction analysis is non-planar and its twist angle about 43 o. The bond length and bond alternation in the crystal structures reveal that the central two six-membered rings lack aromaticity. Systematic studies of the reaction conditions reveal that palladium catalyst, the amount of silver, reactivity of phosphine and solvent all play key roles. The reaction conditions have been optimized. Upon heating 1-iodo-8-(phenylethynyl)naphthalene (23a) in o-xylene at 130 oC about 36 hours with mixture of palladium(Ⅱ??acetate, Pd(OAc)2, silver carbonate and tris(furan-2-yl)phosphine can be obtained 73% yield. We have generated about 13 zethrene derivatives in this method and the yield from 18–73%. According to the yield, when the aryl-substitutent on terminal alkynes are donating characters or larger substituent, the yield is low; verse visa, when the aryl-substituent on terminal alkynes are withdrawing characters or small substitutent, the yield is better.
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Lin, Ying-Huo, et 林景和. « Abiotic transformation of pyrogallol, amino acid, and glucose-6-phosphate as catalyzed by Fe and Mn oxides ». Thesis, 1990. http://ndltd.ncl.edu.tw/handle/45770371309839378617.

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Hsu, Wei-Ti, et 徐維悌. « Oscillating and Kinetic study of Bromate-Ethyl Hydrogen Malonate Reaction Catalyzed by Ce(III),Mn(II) and Ferriin ». Thesis, 1996. http://ndltd.ncl.edu.tw/handle/64930447860387947042.

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碩士
國立成功大學
化學系
84
The Ce(III), Mn(II) or Fe(phen)32+ -catalyzed redox reaction of bromate ionwith 1M aqueous sulfuric acid exhibits oscillating behavior in the concentrationof bromide as well as metal ion. The induction period is shortened by the presence of bromomalonic acid under the catalysis by Ce(III) or Mn(II) ion whereas it is not shortened under the catalysis by Fe(phen)32+ ion.The induction period is about 1 hour under the catalysis of Ce(III) or Mn(II)and no induction period exists under the catalysis of Fe(phen)32+ ion.The kinetics of the oxidation of EHM by Ce(IV), Mn(II), or Fe(phen)33+ in 1M　aqueous sulfuric acid were studied by using[the spectrophotometric method . In general, the rate law can be described as-d[M(n+1)+]/dt=k2 [EHM][M(n+1)+]/(Km+[EHM])( M(n+1)+ = Ce(IV), Mn(III) or Fe( phen)33+ )The order of relative reactivity toward oxidizing EHM is Mn(II) > Ce(IV) >Fe(phen)33+ under aerobic condition and Mn( II) = Ce(IV) > Fe(phen)33+ under anaerobic condition.
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Tsai, Reay-Fun, et 蔡瑞芳. « Kinetic study of the reaction to the Ce(III),Mn(II),Ferriin- catalyzed Bromate-2-ketoglutaric Acid Oscillating Reaction ». Thesis, 1996. http://ndltd.ncl.edu.tw/handle/17732684418279400981.

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碩士
國立成功大學
化學系
84
Abstract The Ce(III),Mn(II) or Fe( phen)3+3 -catalyzed redox reaction ofbromate ion with 2-ketoglutaric Acid (KGA) in 1M aqueous sulfuric acid exhibits oscillating behavior in the concentration of bromide ions.The induction period approaches zero and its oscillating behavior seems like the Belousov-Zhabotinsky(BZ) oscillating reaction with Pyruvic Acid (PyA). The kinetics of the Ce(IV),Mn(III), or Fe(phen)3+3 ion oxidation of 2-ketoglutaric Acid was studied by using the spectrophotometric method and the stopped flow technique.Under similar conditions,the order of relative rate is Mn(III)-KGA >Ce(IV)-KGA >Fe(phen)3+3-KGAreactions. The rate law of Mn(III)-oxidation of KGA can be described as -d[Mn(III)]/dt=k2'[KGA][Mn(III)]/Km+[KGA] at 25C,the value of k2' for Mn(III)-KGA is 0.196 s-1. The rate law of Ce(IV) and Fe(phen)3+3 -oxidation of KGA can be described as -d[M(n+1)]/dt=k2[KGA][M(n+1)] ( M(n+1)=Ce(IV) or Fe( phen)3+3) The second order rate constant at 25C for the Ce( IV)-KGA and Fe(phen)3+3 -KGA reactions are 6.01 M-1s-1 and 0.218 M-1s-1. The results have valuable implications for understanding the mechanistic details of the BZ oscillating reactions of keto Acids.
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Chapitres de livres sur le sujet "Mn-catalyzed"

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Campestrini, S., et F. Novello. « Olefin Epoxidation by PH4PHSO5 Catalyzed by Mn(III)-Porphyrins Under Homogeneous Conditions ». Dans The Activation of Dioxygen and Homogeneous Catalytic Oxidation, 452. Boston, MA : Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-3000-8_43.

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« Active Species and Mechanisms of Non-Heme Fe- and Mn-Catalyzed Oxidations ». Dans Environmentally Sustainable Catalytic Asymmetric Oxidations, 134–45. CRC Press, 2014. http://dx.doi.org/10.1201/b17422-11.

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Halligudi, S. B., D. Chatterjee, D. B. Shukla et R. S. Somani. « Homologation of methanol catalyzed by Mn(salen)Cl2 complex encapsulated in zeolite-Y ». Dans Recent Advances In Basic and Applied Aspects of Industrial Catalysis, Proceedings of 13th National Symposium and Silver Jubilee Symposium of Catalysis of India, 841–43. Elsevier, 1998. http://dx.doi.org/10.1016/s0167-2991(98)80368-6.

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Curet-Arana, María C., Randall Q. Snurr et Linda J. Broadbelt. « Quantum Chemical Analysis of the Reaction Pathway for Styrene Epoxidation Catalyzed by Mn-Porphyrins ». Dans Mechanisms in Homogeneous and Heterogeneous Epoxidation Catalysis, 471–86. Elsevier, 2008. http://dx.doi.org/10.1016/b978-0-444-53188-9.00019-5.

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Taber, Douglass F. « Substituted Benzenes : The Kirsch Synthesis of Cybrodol ». Dans Organic Synthesis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199965724.003.0063.

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Stephen L. Buchwald of MIT established (J. Am. Chem. Soc. 2010, 132, 14076) a Pd-catalyzed protocol for conversion of an aryl triflate 1 to the halide 2. Jie Wu of Fudan University prepared (Tetrahedron Lett. 2010, 51, 6646) aromatic halides from the corresponding carboxylic acids. Yong-Chua Teo of Nanyang Technological University described (Tetrahedron Lett . 2010, 51, 3910) the Mn-mediated conversion of 3 to 5, suggesting a benzyne intermediate. Takanori Shibata of Waseda University effected (Synlett 2010, 2601) the direct Ru-mediated coupling of aryl halides with amines, and Paul Helquist of the University of Notre Dame prepared (J. Org. Chem. 2010, 75, 4887) anilines by coupling aryl halides with NaN3 . Chao-Jun Li of McGill University devised (Tetrahedron Lett. 2010, 51, 5486) the Pd-catalyzed decarbonylative Heck coupling of 6 with 7 to give 8. Mats Larhed of Uppsala University showed (Angew. Chem. Int. Ed. 2010, 49, 7733) that Pd could also catalyze the decarboxylative coupling of an aromatic acid 9 with a nitrile to give the ketone 10. Dennis G. Hall of the University of Alberta found (Tetrahedron Lett. 2010, 51, 4256) that an areneboronic acid could promote the Zr-catalyzed ortho condensation of a phenol 11 with an aldehyde, leading to 12, which could then be carried on to a range of other products. Professor Hall also showed (Angew. Chem. Int. Ed. 2010, 49, 2883) that areneboronic acids are stable to many standard organic transformations, and that the product boronic acids can be readily purified by extraction into sorbitol/Na2CO3. Professor Buchwald reported (J. Am. Chem. Soc. 2010, 132, 14073) an optimized source of Pd for the Suzuki-Miyaura coupling, allowing the room-temperature participation even of unstable boronic acids such as 13. Wing-Yiu Yu of the Hong Kong Polytechnic University observed (J. Am. Chem. Soc. 2010, 132, 12862) that 17 was an effective donor for the Pd-catalyzed ortho C-H amination of 16. Nicholas C. O. Tomkinson of Cardiff University uncovered (Synlett 2010, 2471) the facile rearrangement of 19 to 20. Professor Buchwald described (J. Am. Chem. Soc. 2010, 132, 9990) the coupling of 21, prepared from the aryl halide, with 22 to give the benzofuran 23.
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Taber, Douglass. « Transition Metal-Mediated Ring Construction : The Yu Synthesis of 1-Desoxyhypnophilin ». Dans Organic Synthesis. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199764549.003.0075.

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Both 1 and 3 are inexpensive prochiral starting materials. Tae-Jong Kim of Kyungpook National University devised (Organomet. 2008, 27, 1026) a chiral Cu catalyst that efficiently converted 1 (other ring sizes worked as well) to the enantiomerically pure ester 2. Alexandre Alexakis of the University of Geneva found (Adv. Synth. Cat. 2008, 350, 1090) a chiral Cu catalyst that mediated the enantioselective coupling of 3 with Grignard reagents such as 4 . The π-allyl Pd complex derived from 6 is also prochiral. Barry M. Trost of Stanford University showed (Angew. Chem. Int. Ed. 2008, 47, 3759) that with appropriate ligand substitution, coupling with the phthalimide 7 proceeded to give 8, readily convertible to (-)-oseltamivir (Tamiflu) 9, in high ee. Jonathan W. Burton of the University of Oxford found (Chem Commun. 2008, 2559) that Mn(OAc)3 -mediated cyclization of 10 delivered the lactone 12 with high diastereocontrol. John Montgomery of the University of Michigan observed (Organic Lett. 2008, 10, 811) that the Ni-catalyzed cyclization of 12 also proceeded with high diastereocontrol. Ken Tanaka of the Tokyo University of Agriculture and Technology combined (Angew. Chem. Int. Ed. 2008, 47, 1312) Rh-catalyzed ene-yne cyclization of 14 with catalytic ortho C-H functionalization, leading to 16 in high ee. Eric N. Jacobsen of Harvard University designed (Angew. Chem. Int. Ed. 2008, 47, 1469) a chiral Cr catalyst for the intramolecular carbonyl ene reaction, that converted 17 to 18 in high ee. Using a stoichiometric prochiral Cr carbene complex 20 and the enantiomerically-pure secondary propargylic ether 19, Willam D. Wulff of Michigan State University prepared (J. Am. Chem. Soc. 2008, 130, 2898) a facially-selective Cr-complexed o -quinone methide intermediate, that cyclized to 21 with high ee. A variety of methods have been put forward for the transition metal-mediated construction of polycarbocyclic systems. One of the more powerful is the enantioselective Rh-catalyzed stitching of the simple substrate 22 into the tricycle 23 devised (J. Am. Chem. Soc. 2008, 130, 3451) by Takanori Shibata of Waseda University. Inter alia, ozonolysis of 23 delivered the cyclopentane 24 containing two all-carbon quaternary centers.
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Taber, Douglass F. « Metal-Mediated C–C Ring Construction : The Ding Synthesis of (−)-Indoxamycin B ». Dans Organic Synthesis. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780190646165.003.0075.

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Shou-Fei Zhu of Nankai University developed (Angew. Chem. Int. Ed. 2014, 53, 13188) an iron catalyst that effected the enantioselective cyclization of 1 to 2. Bypassing diazo precursors, Junliang Zhang of East China Normal University used (Angew. Chem. Int. Ed. 2014, 53, 13751) a gold catalyst to cyclize 3 to 4. Taking advantage of energy transfer from a catalytic Ir complex, Chuo Chen of University of Texas Southwestern carried out (Science 2014, 346, 219) intramolec­ular 2+2 cycloaddition of 5, leading, after dithiane formation, to the cyclobutane 6. Intramolecular ketene cycloaddition has been limited in scope. Liming Zhang of the University of California Santa Barbara found (Angew. Chem. Int. Ed. 2014, 53, 9572) that intramolecular oxidation of an intermediate Ru vinylidene led to a species that cyclized to the cyclobutanone 8. James D. White of Oregon State University devised (J. Am. Chem. Soc. 2014, 136, 13578) an iron catalyst that mediated the enantioselective Conia-ene cyclization of 9 to 10. Xiaoming Feng of Sichuan University observed (Angew. Chem. Int. Ed. 2014, 53, 11579) that the Ni-catalyzed Claisen rearrangement of 11 proceeded with high diastereo- and enantiocontrol. The relative configuration of the product 12 was not reported. Robert H. Grubbs of Caltech showed (J. Am. Chem. Soc. 2014, 136, 13029) that ring opening cross metathesis of 13 with 14 delivered the Z product 15. Mn(III) cyclization has in the past required a stoichiometric amount of inorganic oxidant. Sangho Koo of Myong Ji University found (Adv. Synth. Catal. 2014, 356, 3059) that by adding a Co co- catalyst, air could serve as the stoichiometric oxidant. Indeed, 16 could be cyclized to 17 using inexpensive Mn(II). Matthias Beller of the Leibniz-Institüt für Katalyse prepared (Angew. Chem. Int. Ed. 2014, 53, 13049) the cyclohexene 20 by coupling the racemic alcohol 18 with the amine 19. Paultheo von Zezschwitz of Philipps-Universität Marburg added (Chem. Commun. 2014, 50, 15897) diethyl zinc in a conjugate sense to 21, then reduced the product to give 22. Depending on the reduction method, either diastereomer of the product could be made dominant. Nuno Maulide of the University of Vienna dis­placed (Angew. Chem. Int. Ed. 2014, 53, 7068) the racemic chloride 23 with diethyl zinc to give 24 as a single diastereomer.
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Kündig, E. P., et S. H. Pache. « Palladium-Catalyzed Reactions ». Dans Compounds of Groups 7-3 (Mn..., Cr..., V..., Ti..., Sc..., La..., Ac...), 1. Georg Thieme Verlag KG, 2003. http://dx.doi.org/10.1055/sos-sd-002-00240.

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Kündig, E. P., et S. H. Pache. « Via Palladium-Catalyzed Reactions ». Dans Compounds of Groups 7-3 (Mn..., Cr..., V..., Ti..., Sc..., La..., Ac...), 1. Georg Thieme Verlag KG, 2003. http://dx.doi.org/10.1055/sos-sd-002-00227.

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Dissanayake, P., D. J. Averill et M. J. Allen. « Lanthanide-Catalyzed Mukaiyama Aldol Reactions ». Dans Compounds of Groups 7-3 (Mn..., Cr..., V..., Ti..., Sc..., La..., Ac...), 1. Georg Thieme Verlag KG, 2011. http://dx.doi.org/10.1055/sos-sd-102-00094.

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Actes de conférences sur le sujet "Mn-catalyzed"

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Martelli, F., S. Rubini, M. Piccin, G. Bais, F. Jabeen, S. De Franceschi, V. Grillo et al. « Fabrication And Characterization Of Mn-catalyzed GaAs Nanowires ». Dans PHYSICS OF SEMICONDUCTORS : 28th International Conference on the Physics of Semiconductors - ICPS 2006. AIP, 2007. http://dx.doi.org/10.1063/1.2729769.

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