Direct coupling between β-functionalized organolithium compounds and aryl and vinyl halides
作者:José Barluenga、Javier M. Montserrat、Josefa Flórez
DOI:10.1016/s0040-4039(00)60038-2
日期:1992.10
Treatment of N-lithio-N-(2-lithioethyl)benzamide with different aromatic and vinylic halides affords directly the corresponding substitution products: functionalized benzamides 3 – 10.
A highly enantioselective intermolecular benzylic C(sp3)−H bond amination by using a chiral cationic copper catalyst and oxidant di-tert-butyl peroxide is reported. This mild, straightforward method can be used to transform an array of feedstock alkylarenes and amides into chiral amines with high enantioselectivities, and it has good functional group tolerance and a broad substrate scope.
Direct coupling of functionalized organolithium compounds with aryl and vinyl halides
作者:Jose Barluenga、Javier M. Montserrat、Josefa Florez
DOI:10.1021/jo00074a025
日期:1993.10
The reaction between beta- and gamma-nitrogen-functionalized and gamma- and epsilon-oxygen-functionalized organolithium compounds 3, 4, 30-32 and different aromatic, heteroaromatic, and vinylic halides affords directly the corresponding substitution products: functionalized benzamides 5-26 and alcohols 33-37. Symmetrical and mixed products of double coupling 38-40 were also prepared from 1,4-diiodobenzene. The formation of alkyl halides as intermediates has been verified. Aryl or vinyl halides giving rise to unstable aryl or vinyllithium reagents were unsuccessful in the coupling reaction.