Iridium-catalyzed regio- and enantioselective allylic alkylation of fluorobis(phenylsulfonyl)methane
作者:Wen-Bo Liu、Sheng-Cai Zheng、Hu He、Xiao-Ming Zhao、Li-Xin Dai、Shu-Li You
DOI:10.1039/b914315g
日期:——
Highly regio- and enantioselectiveallylic alkylation of fluorobis(phenylsulfonyl)methane (FBSM) has been realized by [Ir(COD)Cl](2)/phosphoramidite, affording enantiopure fluorobis(phenylsulfonyl)methylated compounds bearing a terminal alkene, which could be converted to monofluoro-methylated ibuprofen in just two steps without loss of the optical purity (95% ee).
Difunctionalization of ketones <i>via gem</i>-bis(boronates) to synthesize quaternary carbon with high selectivity
作者:Purui Zheng、Yujie Zhai、Xiaoming Zhao、Tao XU
DOI:10.1039/c8cc07781a
日期:——
quaternary centres from ketones via the diborylation process and Suzuki–Miyaura cross-coupling reaction. This methodology, which simultaneously introduces two different kinds of electrophilic structures, exhibits a large substrate scope and high functional group tolerance. The reaction products with aldehyde and allylic groups have proved to be versatile synthons to prepare complex molecules crucial for natural
Enantioselective synthesis of fluorinated branched allylic compounds via Ir-catalyzed allylations of functionalized fluorinated methylene derivatives
作者:Hongbo Zhang、Jiteng Chen、Xiao-Ming Zhao
DOI:10.1039/c6ob01246a
日期:——
Enantioselective introduction of the functionalized monofluorinated methylenes into the allylic fragment under Ir catalysis has been realized, which gave the fluorinated branched allyl products in good to high yields with excellent regio- and enantioselectivities.