Готові списки джерел за темами / Diazabutadienes

Добірка наукової літератури з теми "Diazabutadienes"

Автор: Grafiati

Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Diazabutadienes"

Romero-Ortega, Moisés, Ignacio Medina-Mercado, Ivann Zaragoza-Galicia, and Horacio Olivo. "2-Trifluoromethyl-1,3-diazabutadienes as Useful Intermediates for the Construction of 2-Trifluoromethylpyrimidine Derivatives." Synthesis 50, no. 20 (July 16, 2018): 4133–39. http://dx.doi.org/10.1055/s-0037-1610444.

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A methodology to prepare 2-trifluoromethylpyrimidines has been developed on the basis of a cyclization reaction of 2-trifluoromethyl-1,3-diazabutadienes. These 2-trifluoromethyl-1,3-diazabutadienes were prepared by the condensation of trifluoroacetamidine and amide acetals or with chloromethaniminium salt derived from N,N-dimethylbenzamide with phosphorus oxychloride. The cycloaddition reactions of these 2-trifluoromethyl-1,3-diazabutadienes with DMAD and phenylacetyl chloride provided 2-trifluoromethylpyrimidine derivatives in regular to moderate overall yield.

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Romero-Ortega, Moisés, Michelle Trujillo-Lagunas, Ignacio Medina-Mercado, Ivann Zaragoza-Galicia, and Horacio Olivo. "A Synthesis of 4-Chloro-2-(trichloromethyl)pyrimidines and Their Study in Nucleophilic Substitution." Synthesis 51, no. 02 (September 11, 2018): 530–37. http://dx.doi.org/10.1055/s-0037-1610270.

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A convenient two-step, one-pot synthesis of 4-chloro-2-(trichloromethyl)pyrimidines starting from 2-(trichloromethyl)-1,3-diazabutadienes is described. These nitrogen heterocycles were prepared by a sequential acylation/intramolecular cyclization reaction between 2-(trichloromethyl)-1,3-diazabutadienes and acyl chlorides in the presence of triethylamine followed by treatment with POCl3. This is the first report for the synthesis of this type of 4-chloro-2-(trichloromethyl)pyrimidine derivatives and serves as a source for a wide variety of other substituted pyrimidines by nucleophilic substitution reactions.

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Sain, Bir, Satyendra P. Singh, and Jagir S. Sandhu. "Diazabutadienes in heterocyclic syntheses: reaction of 1,3-diazabutadienes with 2-oxazolin-5-ones." Tetrahedron Letters 32, no. 38 (September 1991): 5151–52. http://dx.doi.org/10.1016/s0040-4039(00)93452-x.

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SAIN, B., S. P. SINGH, and J. S. SANDHU. "ChemInform Abstract: Diazabutadienes in Heterocyclic Syntheses: Reaction of 1,3- Diazabutadienes with 2-Oxazolin-5-ones." ChemInform 23, no. 23 (August 22, 2010): no. http://dx.doi.org/10.1002/chin.199223188.

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Alvarez-Vald�s, Amparo, Mar�a Jos� Camaz�n, Jos� R. Masaguer, and Carmen Navarro-Ranninger. "Complexes of copper(II) with diazabutadienes." Transition Metal Chemistry 12, no. 1 (February 1987): 55–58. http://dx.doi.org/10.1007/bf01023133.

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Bhadbhade, Mohan, Guy K. B. Clentsmith, and Leslie D. Field. "Sterically Hindered Diazabutadienes (DABs): Competing Reaction Pathways with MeLi." Organometallics 29, no. 23 (December 13, 2010): 6509–17. http://dx.doi.org/10.1021/om100850p.

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Nandy Mazumdar, Sujit, Manoj Sharma, and Mohinder Pal Mahajan. "Diels-Alder cycloaddition reactions of 1,3-diazabutadienes with sulfene." Tetrahedron Letters 28, no. 23 (January 1987): 2641–42. http://dx.doi.org/10.1016/s0040-4039(00)96169-0.

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Mazumdar, Sujit Nandy, Ibrahim Ibnusaud, and Mohinder Pal Mahajan. "Diels-alder cycloaddition reactions of 1,3-diazabutadienes with ketenes." Tetrahedron Letters 27, no. 48 (January 1986): 5875–76. http://dx.doi.org/10.1016/s0040-4039(00)85351-4.

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Bubnov, Michael P., Vladimir K. Cherkasov, Irina A. Teplova, Nickolay O. Druzhkov, Ivan D. Grishin, Evgenii V. Baranov, Artem S. Bogomyakov, and Gleb A. Abakumov. "Novel dioxolene nickel complexes with sterically hindered diazabutadienes. Coupling of aza-ligands coordinated to nickel." Dalton Transactions 48, no. 28 (2019): 10516–25. http://dx.doi.org/10.1039/c9dt01309a.

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Trifonov, Alexander A., Boris G. Shestakov, Konstantin A. Lyssenko, Joulia Larionova, Georgy K. Fukin, and Anton V. Cherkasov. "Sterically Governed Redox Reactions. One-Electron Oxidation of Ytterbocenes by Diazabutadienes: Formation of Radical-Anionic Diazabutadiene vs Covalently Bonded Imino–Amido Ligand." Organometallics 30, no. 18 (September 26, 2011): 4882–89. http://dx.doi.org/10.1021/om200429h.

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Більше джерел

Дисертації з теми "Diazabutadienes"

FRIOT, CELINE. "1-thia-3-azabutadienes et 1,3-diazabutadienes : applications en chimie heterocyclique." Nantes, 1998. http://www.theses.fr/1998NANT2068.

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1-thia-3-azabutadienes et 1,3-diazabutadienes : applications en chimie heterocyclique. Dans le premier chapitre, la preparation d'enchainements 1-thia-3-azabutadienes comportant un groupement electroattracteur en position 2 est decrite. Ces composes permettent d'acceder, par des reactions de cycloaddition 4+2, aux 6h-1,3-thiazines. Une seconde annelation par cycloadditions 2+2 fournit une gamme variee de cephemes dans des conditions douces. Le second chapitre est consacre a l'etude des 2,4-diamino-1-thia-3-azabutadienes. La mise en evidence du caractere ambident de ces enchainements a conduit a la synthese de thiazoles, de 6h-1,3-thiazines et de tetrahydropyrimidine-2-thiones. Dans le troisieme chapitre, la reactivite de methylthiodiazabutadienes cationiques ou neutres est etudiee et permet l'acces a de nombreux heterocycles : 2-methylthio-3,4-dihydropyrimidines, 2-methylthio-3,4-dihydropyrimidinones, 3-methylthio-2h-1,2,4-thiadiazine-1,1-dioxydes. La sulfhydratation du motif methylthioimine permet une synthese generale des composes thiocarbonyles correspondants.

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Moody, Aidan G. "The electronic structure of diazabutadiene complexes." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389183.

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Duraisamy, Ramesh [Verfasser], and Frank T. [Gutachter] Edelmann. "Synthesis and structural characterization of new alkali metal, alkalineearth metal, and lanthanide complexes with 1,4-diazabutadiene ligands / Ramesh Duraisamy ; Gutachter: Frank T. Edelmann." Magdeburg : Universitätsbibliothek Otto-von-Guericke-Universität, 2019. http://d-nb.info/1219964964/34.

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Duraisamy, Ramesh Verfasser], and Frank T. [Gutachter] [Edelmann. "Synthesis and structural characterization of new alkali metal, alkalineearth metal, and lanthanide complexes with 1,4-diazabutadiene ligands / Ramesh Duraisamy ; Gutachter: Frank T. Edelmann." Magdeburg : Universitätsbibliothek Otto-von-Guericke-Universität, 2019. http://d-nb.info/1219964964/34.

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Verma, Piyush Kumar. "Cobalt-nhc Complexes and Diazabutadienes in Activation of Mono/Diboron Compounds and Their Application in C-b Coupling Reactions." Thesis, 2021. https://etd.iisc.ac.in/handle/2005/5241.

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Boronic acid(esters) have been well recognized as an indispensable coupling partner in the Suzuki-Miyaura cross coupling reactions producing a vast spectrum of molecules, applicable in the diverse field ranging from medicinal to materials sciences.[1] Transition metal catalyzed synthesis of boronic esters from diborons with the assistance of bases is a well-established methodology[2]. In this thesis, the cobalt-N-Heterocyclic carbene complexes catalyzed borylation of organic compounds and interaction of diazabutadienes with diboron compounds will be discussed. (i) In the first section, Co(IMes)2Cl2 catalyzed borylation of aryl halides will be discussed. [3a] The robust protocol, operating under mild condition facilitate the borylation of a diverse range of aryl halides with great efficacy, which includes the challenging aryl chlorides. The preliminary mechanistic studies suggest that base-bis(pinacolato)diboron adduct reduces the Co(IMes)2Cl2 complex to generate Co(IMes)2Cl complex, which acts as an active catalytic species. (ii) The second section deals with catalytic synthesis of primary and secondary alkyl boronic esters using alkyl halides. [3b] The in situ generated Co-NHC complex, in assistance with base and diboron compound, produces the corresponding borylated product from alky halides. The reaction proceeds under very mild conditions and covers a wide range of alkyl halides, including chlorides having different functional groups. (iii) In the third section, development in selective hydroboration of vinyl arenes and aliphatic alkenes will be discussed. [3c] Catalyzed by Co(I)NHC complex, the alkene hydroboration by pinacol borane gives Markovnikov selective product with good selectivity, where the regio-selectivity is controlled by phenyl substituent. In absence of that, complete inversion in the selectivity has been observed. The preliminary mechanistic cycle suggests that the catalytic cycle proceeds via oxidative addition of pinacol borane to [Co] followed by alkene insertion and reduction elimination steps. (iv) The last section discusses the interaction of diazabutadiene molecules with diboron compounds. [3d] The diazabutadiene derivatives have been observed to completely cleave the B-B bond of Bis(catacolato)diboron and Bis(dithiocatacolato)diboron. The preliminary findings hint towards homolytic cleavage of the B-B bond by concerted interaction of the two nitrogen atoms of diazabutadiene with the two boron atoms of the diboron from the same face. References: [1] Boronic Acids-Preparation and Applications in Organic Synthesis, Medicine and Materials, 2nd ed.; Hall, D. G., Ed.; Wiley-VCH: Weinheim, 2011. [2] Neeve, E. C.; Geier, S. J.; Mkhalid, I. A. I.; Westcott, S. A.; Marder, T. B. Diboron(4) Compounds: From Structural Curiosity to Synthetic Workhorse. Chem. Rev. 2016, 116, 9091-9161. [3] (a) Verma, P. K.; Mandal, S.; Geetharani, K. ACS Catal. 2018, 8, 4049-4054. (b) Verma, P. K.; Prasad, K. S.; Varghese, D.; Geetharani, K. Org. Lett. 2020, 22, 4, 1431-1436. (c) Verma, P. K.; Setulekshmi, A. S.; Geetharani, K. Org. Lett. 2018, 20, 7840-7845. (d) Verma, P. K.; Meher, N. K.; Geetharani, K. Accepted for publication in Chem. Commun., Manuscript ID: CC-COM-06-2021-002881.R2.

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Частини книг з теми "Diazabutadienes"

Pardasani, R. T., and P. Pardasani. "Magnetic properties of tris diazabutadiene ytterbium complex." In Magnetic Properties of Paramagnetic Compounds, 588–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-49202-4_283.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ytterbium(III) bis(indenyl)-diazabutadiene complex." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 5, 1341–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-65098-1_500.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of ytterbium(III) bis(indenyl)-diazabutadiene complex." In Magnetic Properties of Paramagnetic Compounds, Magnetic Susceptibility Data, Volume 5, 1343–45. Berlin, Heidelberg: Springer Berlin Heidelberg, 2022. http://dx.doi.org/10.1007/978-3-662-65098-1_501.

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Sato, N. "From 1,4-Diazabutadienes." In Six-Membered Hetarenes with Two Identical Heteroatoms, 1. Georg Thieme Verlag KG, 2011. http://dx.doi.org/10.1055/sos-sd-116-00442.

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Sato, N. "From 1,4-Diazabutadienes." In Six-Membered Hetarenes with Two Identical Heteroatoms, 1. Georg Thieme Verlag KG, 2004. http://dx.doi.org/10.1055/sos-sd-016-00935.

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Isovitsch, R. "27.27 Product Class 27: 1,2-Diimines." In Knowledge Updates 2021/2. Stuttgart: Georg Thieme Verlag KG, 2021. http://dx.doi.org/10.1055/sos-sd-127-00451.

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AbstractThe utility of 1,2-diimines (α-diimines, 1,4-diazabutadienes) stems from the ease with which their steric and electronic properties can be tailored to a specific use. Current interest in this area involves using 1,2-diimines as precursors for novel bioactive compounds, as well as transition-metal ligands for the formation of novel polymerization catalysts and chemotherapeutic agents. In this review, the fundamental approaches for the synthesis of 1,2-diimines are described, as well as a current sampling of the unique ways that they are used to solve research problems. The chapter is organized based on the ways that 1,2-diimines are synthesized: condensation reactions and metal-promoted methods.

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