Lipase-catalysed kinetic resolution of 1-O-alkylglycerols by sequential transesterification
作者:Arnar Halldorsson、Pall Thordarson、Bjorn Kristinsson、Carlos D. Magnusson、Gudmundur G. Haraldsson
DOI:10.1016/j.tetasy.2004.07.046
日期:2004.9
prepared by enantioselective lipase-catalysed transesterification. Their racemates were synthesised in two steps by reacting racemic solketal with the bromides of the corresponding fatty alcohols and a subsequent conversion of the intermediates into the 1-O-alkylglycerols by deprotection under acidic aqueous conditions. The Pseudomonas fluorescens lipase was employed to kinetically resolve the racemic 1-O-alkylglycerols
通过对映选择性脂肪酶催化的酯交换反应制备1- O-烷基甘油类型的天然S-构型的Chimyl,batyl和selachyl醇。它们的外消旋体是分两步合成的,即外消旋的缩酮与相应的脂肪醇的溴化物反应,然后通过在酸性水溶液条件下进行脱保护将中间体转化为1- O-烷基甘油。的荧光假单胞菌的脂肪酶被用于动力学解析消旋的1- Ô通过连续二乙酰过程-alkylglycerols向他们提供实质上对映体纯。对于饱和的甲基E(E = 17–32)和batyl(E = 14–38)醇在降低的温度下,而对于单不饱和selachyl(E = 12–13)醇,则未观察到这种温度影响。