[EN] ORGANOZINC COMPLEXES AND PROCESSES FOR MAKING AND USING THE SAME [FR] COMPLEXES D'ORGANOZINC ET PROCÉDÉS POUR LEUR FABRICATION ET LEUR UTILISATION
[EN] ORGANOZINC COMPLEXES AND PROCESSES FOR MAKING AND USING THE SAME [FR] COMPLEXES D'ORGANOZINC ET PROCÉDÉS POUR LEUR FABRICATION ET LEUR UTILISATION
A Zinc Catalyzed C(sp<sup>3</sup>
)−C(sp<sup>2</sup>
) Suzuki-Miyaura Cross-Coupling Reaction Mediated by Aryl-Zincates
作者:Richard J. Procter、Jay J. Dunsford、Philip J. Rushworth、David G. Hulcoop、Richard A. Layfield、Michael J. Ingleson
DOI:10.1002/chem.201704170
日期:2017.11.13
able to catalyze SM reactions. The cross‐coupling of benzyl bromides with aryl borates is catalyzed by ZnBr2, in a process that is free from added ligand, and is compatible with a range of functionalized benzyl bromides and arylboronicacid pinacol esters. Initial mechanistic investigations indicate that the selective in situ formation of triaryl zincates is crucial to promote selective cross‐coupling
铃木-宫浦(SM)反应是化学合成中 C−C 键形成的最重要方法之一。在本次交流中,我们首次证明低毒、廉价的锌元素能够催化 SM 反应。苄基溴与芳基硼酸酯的交叉偶联由 ZnBr 2催化,该过程无需添加配体,并且与一系列官能化的苄基溴和芳基硼酸频哪醇酯相容。初步的机理研究表明,三芳基锌酸盐的选择性原位形成对于促进选择性交叉偶联反应性至关重要,这可以通过使用具有最佳亲核性的芳基硼酸盐来促进。
Zinc−Zinc Bonded Zincocene Structures. Synthesis and Characterization of Zn<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>Me<sub>5</sub>)<sub>2</sub> and Zn<sub>2</sub>(η<sup>5</sup>-C<sub>5</sub>Me<sub>4</sub>Et)<sub>2</sub>
作者:Abdessamad Grirrane、Irene Resa、Amor Rodriguez、Ernesto Carmona、Eleuterio Alvarez、Enrique Gutierrez-Puebla、Angeles Monge、Agustín Galindo、Diego del Río、Richard A. Andersen
DOI:10.1021/ja0668217
日期:2007.1.1
But, SiMe3), react with dialkyl and diaryl derivatives, ZnR'2, to give the half-sandwich compounds (eta5-C5Me4R)ZnR', under certain conditions the reactions of Zn(C5Me5)2 with ZnEt2 or ZnPh2 produce unexpectedly the dizincocene Zn2(eta5-C5Me5)2 (1) in low yields, most likely as a result of the coupling of two (eta5-C5Me5)Zn* radicals. An improved, large scale (ca. 2 g) synthesis of 1 has been achieved
[EN] SIMPLE ORGANIC MOLECULES AS CATALYSTS FOR PRACTICAL AND EFFICIENT ENANTIOSELECTIVE SYNTHESIS OF AMINES AND ALCOHOLS<br/>[FR] MOLÉCULES ORGANIQUES SIMPLES EN TANT QUE CATALYSEURS POUR LA SYNTHÈSE ÉNANTIOSÉLECTIVE PRATIQUE ET EFFICACE D'AMINES ET D'ALCOOLS
申请人:TRUSTEES BOSTON COLLEGE
公开号:WO2013131043A1
公开(公告)日:2013-09-06
The present invention provides organic molecules and methods thereof for reactions between organoboron reagents and double bonds, such as imines or carbonyls, to stereoselectively provide chiral products including amines and alcohols, entities useful for the preparation of biologically active molecules.
Vyshinskaya, L. I.; Drobotenko, V. V.; Zakharova, S. V., Journal of general chemistry of the USSR, 1991, vol. 61, p. 125 - 130
作者:Vyshinskaya, L. I.、Drobotenko, V. V.、Zakharova, S. V.、Zimina, I. V.、Samarina, T. P.
DOI:——
日期:——
[EN] ORGANOZINC COMPLEXES AND PROCESSES FOR MAKING AND USING THE SAME<br/>[FR] COMPLEXES D'ORGANOZINC ET PROCÉDÉS POUR LEUR FABRICATION ET LEUR UTILISATION
申请人:UNIV MUENCHEN L MAXIMILIANS
公开号:WO2012085168A1
公开(公告)日:2012-06-28
Processes for making an organozinc reagents are disclosed comprising reacting (A) organomagnesium or organozinc complexes with (B) at least one coordination compound comprising one or more carboxylate groups and/or alcoholate groups and/or tertiary amine groups, optionally in combination with zinc ions and/or lithium ions and/or halide ions, wherein the halide ions are selected from chloride, bromide and iodide, the organozinc complex comprises an aryl group, a heteroaryl group or a benzyl group when the coordinating compound is a chelating polyamine, and the reaction is conducted in the presence of zinc complexed with at least one coordinating compound when reactant (A) comprises at least one organomagnesium complex. The resulting organozinc reagents may optionally be isolated from solvents to obtain a solid reagent. The reagents may be used for making organic compounds via Negishi cross-coupling reactions or via aldehyde and/or ketone oxidative addition reactions. The organozinc reagents are stable and, due to their high selectivity, permit maintenance of sensitive functional groups such as aldehydes during cross-coupling.