Asymmetric Synthesis of 1-Tetralones Bearing a Remote Quaternary Stereocenter through Rh-Catalyzed C–C Activation of Cyclopentanones
作者:Shusuke Ochi、Ying Xia、Guangbin Dong
DOI:10.1246/bcsj.20200147
日期:2020.10.15
Herein, we describe the preparation of 1-tetralones bearing a remote quaternary stereocenter in a highly enantioselective manner. A sequence of Pd-catalyzed asymmetric 1,4-addition and Rh-catalyzed...
The asymmetric cyclisation of substituted pent-4-enals by a chiral rhodium phosphine catalyst
作者:Brian R. James、Charles G. Young
DOI:10.1039/c39830001215
日期:——
Treatment of the racemic disubstituted pent-4-enals (1) and (2) at ca. 150 °C with the chiral complex [Rh(chiraphos)2]Cl [chiraphos = 2S,3S-bis(diphenylphosphino)butane] results in a cyclisation reaction and catalytic asymmetric synthesis of the 2,2- and 3,3-disubstituted cyclopentanones (3) and (4), respectively.