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Synthesis of C(2)-Symmetric Benzimidazolium Salts and Their Application in Palladium-Catalyzed Enantioselective Intramolecular α-Arylation of Amides

A series of C(2)-symmetric chiral benzimidazolium salts, the precursor of N-heterocyclic carbene ligands, were designed and synthesized from 1,2-dibromobenzene. In situ prepared corresponding carbenes were tested in the asymmetric palladium-catalyzed intramolecular α-arylation of amides, affording c...

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Detalles Bibliográficos
Autores principales: He, Weiping, Zhao, Wei, Zhou, Bihui, Liu, Haifeng, Li, Xiangrong, Li, Linlin, Li, Jie, Shi, Jianyou
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6274209/
https://www.ncbi.nlm.nih.gov/pubmed/27338322
http://dx.doi.org/10.3390/molecules21060742
Descripción
Sumario:A series of C(2)-symmetric chiral benzimidazolium salts, the precursor of N-heterocyclic carbene ligands, were designed and synthesized from 1,2-dibromobenzene. In situ prepared corresponding carbenes were tested in the asymmetric palladium-catalyzed intramolecular α-arylation of amides, affording chiral diarylmethanols with high yields and moderate enantioselectivities.