Chemoselective Conjugate Reduction of α,β-Unsaturated Ketones Catalyzed by Rhodium Amido Complexes in Aqueous Media
作者:Xuefeng Li、Liangchun Li、Yuanfu Tang、Ling Zhong、Linfeng Cun、Jin Zhu、Jian Liao、Jingen Deng
DOI:10.1021/jo100256t
日期:2010.5.7
electron-withdrawing functional groups, could be reduced on the alkenic double bonds with high selectivities employing amido-rhodium hydride complex in aqueous media, and up to 100% chemoselectivity has been achieved. It is notable that the chemoselectivity was improved significantly on going from organic solvent to water. Moreover, a 1,4-addition mechanism has been proposed on the basis of the corresponding
尽管Noyori Ru-TsDPEN配合物的显着特征是转移氢化反应对C═O官能团具有高度的化学选择性并且对烯烃具有耐受性,但我们的早期报告表明,化学选择性可以从C═O切换为C═C键在活化的α,β-不饱和酮的转移氢化中。现在我们发现,即使在没有其他吸电子官能团的情况下,也可以在水性介质中使用酰胺-铑氢化物络合物以高选择性将各种α,β-不饱和酮还原成烯烃双键,并且具有很高的选择性。已经实现了化学选择性。值得注意的是,从有机溶剂到水,化学选择性显着提高。此外,1