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Artykuły w czasopismach na temat "Buchner reaction"
Wu, Yong-Jin. "ChemInform Abstract: Buchner Reaction". ChemInform 42, nr 30 (30.06.2011): no. http://dx.doi.org/10.1002/chin.201130264.
Pełny tekst źródłaLiu, Yuxiao, Yongming Deng, Peter Y. Zavalij, Renhua Liu i Michael P. Doyle. "An efficient route to highly enantioenriched tetrahydroazulenes and β-tetralones by desymmetrization reactions of δ,δ-diaryldiazoaceto-acetates". Chemical Communications 51, nr 3 (2015): 565–68. http://dx.doi.org/10.1039/c4cc08255a.
Pełny tekst źródłaMato, Mauro, i Antonio M. Echavarren. "Donor Rhodium Carbenes by Retro-Buchner Reaction". Angewandte Chemie 131, nr 7 (18.01.2019): 2110–14. http://dx.doi.org/10.1002/ange.201813512.
Pełny tekst źródłaMato, Mauro, i Antonio M. Echavarren. "Donor Rhodium Carbenes by Retro-Buchner Reaction". Angewandte Chemie International Edition 58, nr 7 (18.01.2019): 2088–92. http://dx.doi.org/10.1002/anie.201813512.
Pełny tekst źródłaPhan Thi Thanh, Nga, Masaya Tone, Hayato Inoue, Ikuhide Fujisawa i Seiji Iwasa. "Highly stereoselective intramolecular Buchner reaction of diazoacetamides catalyzed by a Ru(ii)–Pheox complex". Chemical Communications 55, nr 89 (2019): 13398–401. http://dx.doi.org/10.1039/c9cc06889a.
Pełny tekst źródłaLauterbach, Tobias, Takafumi Higuchi, Matthias W. Hussong, Matthias Rudolph, Frank Rominger, Kazushi Mashima i A. Stephen K. Hashmi. "Gold-Catalyzed Carbenoid Transfer Reactions of Diynes - Pinacol RearrangementversusRetro-Buchner Reaction". Advanced Synthesis & Catalysis 357, nr 4 (4.02.2015): 775–81. http://dx.doi.org/10.1002/adsc.201400849.
Pełny tekst źródłaMaguire, Anita R., N. Rachael Buckley, Patrick O’Leary i George Ferguson. "Stereocontrol in the intramolecular Buchner reaction of diazoketones". Journal of the Chemical Society, Perkin Transactions 1, nr 24 (1998): 4077–92. http://dx.doi.org/10.1039/a807677d.
Pełny tekst źródłaMo, Shanyan, i Jiaxi Xu. "Chemospecific Intramolecular Buchner Reaction Catalyzed by Copper(II) Acetylacetonate". ChemCatChem 6, nr 6 (3.04.2014): 1679–83. http://dx.doi.org/10.1002/cctc.201400014.
Pełny tekst źródłaWang, Yahui, Paul R. McGonigal, Bart Herlé, Maria Besora i Antonio M. Echavarren. "Gold(I) Carbenes by Retro-Buchner Reaction: Generation and Fate". Journal of the American Chemical Society 136, nr 2 (31.12.2013): 801–9. http://dx.doi.org/10.1021/ja411626v.
Pełny tekst źródłaMoody, Christopher J., Soyfur Miah, Alexandra M. Z. Slawin, Darren J. Mansfield i Ian C. Richards. "Stereocontrol in the intramolecular Buchner reaction of diazoamides and diazoesters". Journal of the Chemical Society, Perkin Transactions 1, nr 24 (1998): 4067–76. http://dx.doi.org/10.1039/a807622g.
Pełny tekst źródłaRozprawy doktorskie na temat "Buchner reaction"
Herlé, Bart. "Stereoselective Cyclopropanations via Gold(I)-Catalyzed Retro-Buchner Reactions". Doctoral thesis, Universitat Rovira i Virgili, 2017. http://hdl.handle.net/10803/454770.
Pełny tekst źródłaLa formación de carbenos bencílicos de oro(I) a partir de cicloheptatrienos sustituídos en la posición 7, a través de la reacción de retro-Buchner, ha surgido recientemente como una alternativa segura y versátil a la descomposición de diazocompuestos. Sin embargo, la formación de dichos carbenos tiene lugar a altas temperaturas, limitando su aplicación. El trabajo de esta tesis doctoral se dedicó a superar esta desventaja y a mejorar la versatilidad de la transformación. Los derivados de 1H-ciclopropa[l]fenantreno, que se asemejan al tautómero norcaradieno del cicloheptatrieno, se descomponen para dar lugar a carbenos libres mediante irradiación con luz. Se investigó la formación de carbenos de oro(I) con derivados de fenantreno, a través de la reacción de retro-Buchner. No obstante, no se encontró ninguna mejora significativa con respecto al uso de derivados de cicloheptatrieno. Por otro lado, la generación de carbenos alílicos de oro(I) a partir de 7-alquenil-cicloheptatrienos, tiene lugar a temperaturas significativamente más bajas. Dada esta observación, se desarrolló una reacción de ciclopropanación de olefinas para dar vinil-ciclopropanos y vinil-aminociclopropanos en buenos rendimientos y con elevada selectividad para el isómero cis. Los derivados de 7-alquenil-cicloheptatrieno son formados en un sólo paso a partir de aldehídos y cetonas utilizando un nuevo reactivo de tipo Julia-Kocienski. Adicionalmente, utilizando técnicas experimentales y computacionales, se estudiaron los mecanismos mediados por oro(I) de la reacción de retro-Buchner, de la ciclopropanación y de la reacción de epimerización de los vinilciclopropanos. Esto permitió el desarrollo de un modelo estereoquímico avanzado para las reacciones de ciclopropanación catalizadas por oro(I). El conocimiento aportado por los estudios mecanísticos y la síntesis mejorada de derivados de cicloheptatrieno, permitieron la síntesis de derivados de cicloheptatrieno más estéricamente congestionados, que dan lugar a carbenos de oro(I) a temperatura ambiente y son el punto de partida para el desarrollo de una ciclopropanción enantioselectiva de gran aplicación.
The formation of benzylic gold(I) carbenes from 7-substituted cycloheptatrienes via a retro-Buchner reaction has recently emerged as a safe and versatile alternative to decomposition of diazo compounds. However, the carbene formation takes places at high temperatures, which puts a limit on its application. The work in this thesis is dedicated to overcome this drawback and enhance the versatility of this transformation. Free carbenes can be generated from light-induced decomposition of 1H-cyclopropa[l]phenanthrenes, which bear great resemblance to the norcaradiene tautomer of cycloheptatriene. Therefore, the propensity to form gold(I) carbenes via the retro-Buchner reaction of phenanthrene derivatives was investigated, albeit without finding significant improvements over the cycloheptatriene derivatives. The formation of allylic gold(I) carbenes from 7-alkenyl cycloheptatrienes takes place at significantly lower temperatures. Based on this observation, a highly cis-selective olefin cyclopropanation reaction has been developed, affording vinylcyclopropanes and vinyl-aminocyclopropanes in moderate to good yield. The 7-alkenyl cycloheptatriene derivatives can be formed in a single step from aldehydes and ketones by a novel Julia-Kocienski reagent. The mechanisms of the gold(I)-mediated retro-Buchner, cyclopropanation, and epimerization reactions for vinylcyclopropanes have been studied experimentally and computationally, which led to the development of an advanced stereomodel for gold(I)-catalyzed cyclopropanation reactions. Owing to the mechanistic insights, and the improved strategy for the synthesis of cycloheptatriene reagents, a sterically encumbered cycloheptatriene derivative was developed, which allows the formation of gold(I) carbenes at room temperature, paving the way for a broad-scope enantioselective cyclopropanation reaction.
Phung, Bich Tuyen. "Etude de la sélectivité dans la réaction de Buchner". Electronic Thesis or Diss., Université Grenoble Alpes, 2024. https://theses.hal.science/tel-04651531.
Pełny tekst źródłaThe work presented in this manuscript is divided into two main parts. Firstly, a study about the problem of chemoselectivity during the intramolecular carbene transfer reaction will be presented. The diazo compound bearing different substituent was synthesized as precursor of carbene, and then the carbene transfer reaction was performed in the presence of the Rh2(OAc)4 catalyst. The result displayed the competition between Buchner reaction and C‒H insertion reaction at benzylic position, depended on the substituent. DFT calculations were subsequently conducted to complete the information obtained experimentally. The second major focus of this manuscript involves exploring the reactivity of N-sulfonyl-1,2,3-triazole. N-sulfonyl-1,2,3-triazole precursors were generated using the CuAAC method. The intermolecular formal [3+2] cycloaddition reaction with aromatics catalysed by chiral Rh(II) was then studied
Yin, Xiang. "Synthesis of Indenes and Indanes by Gold(I)-Catalyzed Decarbenation". Doctoral thesis, Universitat Rovira i Virgili, 2018. http://hdl.handle.net/10803/665105.
Pełny tekst źródłaLos derivados de 1,3,5-cicloheptatrienos 7-sustituidos reaccionan con los catalizadores de oro (I) catiónicos, dando carbenos de oro (I) mediante una reacción retro-Buchner en la que dos enlaces C-C en norcaradienos se rompen con Au (I). Esta novedosa estrategia evita el uso de derivados de diazo sensibles al choque y genera carbenos metálicos reactivos in situ que pueden sufrir diversas transformaciones adicionales, como la ciclopropanación de alquenos externos y atados y reacciones de tipo Friedel-Crafts intramoleculares. Para ampliar la gama de métodos sintéticos y aplicaciones disponibles para estos intermedios útiles, en la presente Tesis doctoral hemos desarrollado nuevas transformaciones inducidas por el oro (I) que conducen a la construcción rápida de estructuras importantes y hemos estudiado el mecanismo de forma experimental y mediante cálculos DFT.
7-substituted 1,3,5-cycloheptatrienes derivatives react with cationic gold(I) catalysts gave gold(I) carbenes by a retro-Buchner reaction in which two C-C bonds in norcaradienes are cleaved by Au(I). This novel strategy obviates the use of shock-sensitive diazo derivatives and generates reactive metal carbenes in situ which can undergo further diverse transformations, such as cyclopropanation of external and tethered alkenes and intramolecular Friedel-Crafts-type reactions. To broaden the range of synthetic methods and applications available for these useful intermediates, in the present Doctoral Thesis we have developed new gold(I)-carbenes induced transformations leading to the rapid construction of important frameworks and studied the mechanism experimentally and by DFT calculations.
Schmidt, Renato Jose. "Development of a real-time quantitative polymerase chain reaction method to quantify Lactobacillus buchneri in order to study its growth and effects in silages when added alone or in combination with Pediococcus pentosaceus". Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file, 169 p, 2008. http://proquest.umi.com/pqdweb?did=1601513951&sid=1&Fmt=2&clientId=8331&RQT=309&VName=PQD.
Pełny tekst źródłaBuchert, Felix Eberhard [Verfasser]. "The chloroplast ATP synthase upon oxidative stress : critical targets of reactive oxygen species / Felix Eberhard Buchert". Gießen : Universitätsbibliothek, 2012. http://d-nb.info/1064173403/34.
Pełny tekst źródłaNani, Roger Rauhauser. "The Intramolecular Buchner Reaction of α-Diazo-β-Ketonitriles: Development and Application to the Total Synthesis of (+)-Salvileucalin B". Thesis, 2013. https://thesis.library.caltech.edu/7847/1/Nani-R-R-2013thesis.pdf.
Pełny tekst źródłaSince its discovery in 1896, the Buchner reaction has fascinated chemists for more than a century. The highly reactive nature of the carbene intermediates allows for facile dearomatization of stable aromatic rings, and provides access to a diverse array of cyclopropane and seven-membered ring architectures. The power inherent in this transformation has been exploited in the context of a natural product total synthesis and methodology studies.
The total synthesis work details efforts employed in the enantioselective total synthesis of (+)-salvileucalin B. The fully-substituted cyclopropane within the core of the molecule arises from an unprecedented intramolecular Buchner reaction involving a highly functionalized arene and an α-diazo-β-ketonitrile. An unusual retro-Claisen rearrangement of a complex late-stage intermediate was discovered on route to the natural product.
The unique reactivity of α-diazo-β-ketonitriles toward arene cyclopropanation was then investigated in a broader methodological study. This specific di-substituted diazo moiety possesses hitherto unreported selectivity in intramolecular Buchner reactions. This technology was enables the preparation of highly functionalized norcaradienes and cyclopropanes, which themselves undergo various ring opening transformations to afford complex polycyclic structures.
Finally, an enantioselective variant of the intramolecular Buchner reaction is described. Various chiral copper and dirhodium catalysts afforded moderate stereoinduction in the cyclization event.
Części książek na temat "Buchner reaction"
Li, Jie Jack. "Buchner-Curtius-Schlotterbeck reaction". W Name Reactions, 58. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05336-2_47.
Pełny tekst źródłaLi, Jie Jack. "Buchner-Curtius-Schlotterbeck reaction". W Name Reactions, 54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04835-1_45.
Pełny tekst źródłaLi, Jie Jack. "Bucherer reaction". W Name Reactions, 56. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05336-2_45.
Pełny tekst źródłaLi, Jie Jack. "Bucherer reaction". W Name Reactions, 85–86. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-03979-4_42.
Pełny tekst źródłaLi, Jie Jack. "Bucherer reaction". W Name Reactions, 52. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04835-1_43.
Pełny tekst źródłaLi, Jie Jack. "Bucherer reaction". W Name Reactions, 74–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-01053-8_37.
Pełny tekst źródłaLi, Jie Jack. "Buchner method of ring expansion". W Name Reactions, 59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05336-2_48.
Pełny tekst źródłaLi, Jie Jack. "Buchner method of ring expansion". W Name Reactions, 55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04835-1_46.
Pełny tekst źródłaLi, Jie Jack. "Bucherer-Bergs reaction". W Name Reactions, 57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-662-05336-2_46.
Pełny tekst źródłaLi, Jie Jack. "Bucherer–Bergs reaction". W Name Reactions, 87–88. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-03979-4_43.
Pełny tekst źródłaStreszczenia konferencji na temat "Buchner reaction"
Krunić, Mihajlo J., Jelena Z. Penjišević, Slađana Kostić-Rajačić, Vladimir B. Šukalović, Deana B. Andrić i Ivana I. Jevtić. "Pyrazole/tacrine derivatives as potential cholinesterase inhibitors". W 2nd International Conference on Chemo and Bioinformatics. Institute for Information Technologies, University of Kragujevac, 2023. http://dx.doi.org/10.46793/iccbi23.567k.
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