Organosulphur compounds-lxix1 optically active sulphinates: a new type of enantioselective asymmetric synthesis and kinetic resolution2
作者:Józef Drabowicz、Slawomir Legedź、Marian Mikolajczyk
DOI:10.1016/s0040-4020(01)86031-2
日期:1988.1
Optically active sulphinates with the sulphur atom as a sole centre at chirality are prepared by two methods. The first involves the reaction of symmetrical sulphites with tert-butylmagnesium chloride in the presence of optically active aminoalcohols. This new asymmetric, enantioselective synthesis affords t-butylsulphinates with 40–70% enantiomeric excess values. The second approach is based on a
通过两种方法制备以硫原子为唯一手性中心的旋光性亚磺酸盐。首先涉及在旋光性氨基醇存在下对称亚硫酸盐与叔丁基氯化镁的反应。这种新的不对称,对映体选择性合成提供了40-70%对映体过量值的叔丁基磺酸盐。第二种方法是基于外消旋亚磺酸盐与叔丁基氯化镁与旋光性生物碱碱络合后发生的新型动力学拆分。在该反应中形成的回收的亚硫酸盐和亚砜都显示出适度的光学纯度。