Synthesis of Deuterium-Labeled Plant Sterols and Analysis of Their Side-Chain Mobility by Solid State Deuterium NMR
作者:Mary-Pierre Marsan、William Warnock、Isabelle Muller、Yoichi Nakatani、Guy Ourisson、Alain Milon
DOI:10.1021/jo960228y
日期:1996.1.1
like cholesterol, the second one not. 25-(2)H-Stigmasterol has been synthesized by coupling of the 22-aldehyde derived from stigmasterol by ozonolysis, with the proper sulfone labeled in position 25. The configuration of the ethyl side chain at C-24 was controlled by separation of the diastereomers introduced via a chiral sulfoxide. This synthetic scheme allowed the introduction of a labeled side chain
植物固醇谷固醇和豆甾醇对植物模型膜有非常不同的作用,第一个是胆固醇的“增强剂”,第二个则不是。25-(2)H-Stigmasterol是通过臭氧分解将源自stigmasterol的22-醛与25位标记的适当砜偶联而合成的。C-24处的乙基侧链构型可通过分离通过手性亚砜引入的非对映异构体。该合成方案允许将植物甾醇中的标记的侧链引入到豆甾醇中的八个步骤中,而将九谷甾醇中的九个引入侧链中(总收率约为15%)。使用这两种非对映异构体,还合成了谷甾醇(clionasterol)和豆甾醇(poriferasterol)的24表位。