Enamine Catalysis in the Synthesis of Chiral Structural Analogues ofgem-Bisphosphonates Known To Be Biologically Active
作者:Maria Teresa Barros、Ana Maria Faísca Phillips
DOI:10.1002/ejoc.200800170
日期:2008.5
The synthesis of chiral γ-keto bisphosphonates is described. Michael addition of cyclic ketones to vinyl gem-bisphosphonate catalyzed by 0.1 mol equiv. (S)-(+)-1-(2-pyrrolidinyl)pyrrolidine and benzoic acid gave the products in yields of up to 86 %, dr (cis/trans) > 1:99 and ee of up to 99 %. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)
描述了手性 γ-酮双膦酸盐的合成。由 0.1 mol 当量催化的环酮与乙烯基双膦酸盐的迈克尔加成。(S)-(+)-1-(2-吡咯烷基)吡咯烷和苯甲酸以高达86%的产率、dr (cis/trans) > 1:99和高达99%的ee得到产物。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)