Enantioselective Nitroaldol Reaction Catalyzed by Sterically Modified Salen−Chromium Complexes
作者:Rafał Kowalczyk、Piotr Kwiatkowski、Jacek Skarżewski、Janusz Jurczak
DOI:10.1021/jo802107b
日期:2009.1.16
A group of modified (salen)Cr(III)Cl complexes with bulky benzylic substituents in the 3,3′-position of the salicylidene moiety have been successfully applied for the asymmetric nitroaldol reaction. The readily accessible complex bearing 3-phenylpent-3-yl groups (2 mol %) leads to β-nitro alcohols in up to 92% yield and 94% ee.
一组修饰的(salen)Cr(III)Cl配合物在水杨基部分的3,3'-位具有庞大的苄基取代基,已成功地用于不对称硝基醛醇反应。具有3-苯基戊-3-基(2mol%)的容易获得的络合物导致β-硝基醇的产率高达92%和ee为94%。