An electron rich, new co-operative iridium(III) complex catalysed tandem conversion of α,β-unsaturated ketones to the α-methylated ketones is described using methanol. Employing this chemoselective protocol, reductive methylation of a wide range of chalcone derivatives, variety of aryl and aliphatic fragment containing α,β-unsaturated ketones along with few biologically important molecules were effectively
Direct Synthesis of Chiral Tertiary Diphosphines <i>via</i> Pd(II)-Catalyzed Asymmetric Hydrophosphination of Dienones
作者:Yinhua Huang、Renta Jonathan Chew、Yongxin Li、Sumod A. Pullarkat、Pak-Hing Leung
DOI:10.1021/ol202480r
日期:2011.11.4
A highly diastereo- and enantioselective Pd(II)-catalyzed hydrophosphination of dienones with Ph2PH involving formation of double C*-P bonds has been developed, providing a series of chiral tertiary diphosphines (chiral PCP pincer ligands) in high yields. A catalytic cycle for the reaction was proposed.