作者:Noureddine Khiar、Inmaculada Fernández、Felipe Alcudia、Duy H. Hua
DOI:10.1016/s0040-4039(00)61657-x
日期:1993.1
Optically pure [4-(3′-oxazoline)]methyl methyl- and p-tolylsulfoxides (5R, 5S, 6R and 6S) were prepared from the enolate of the 3-oxazoline 4 and the corresponding o.p. diacetone-D-glucofuranosyl methanesulfinate and menthyl p-toluenesulfinate. The highly diastereoselective reduction of these substrates was successfully achieved using DIBAL/ZnCl2 at −78°C. In this way, four o.p. N-cyclohexyl-β-ami
由3-恶唑啉4的烯醇化物和相应的对二丙酮-D-葡糖呋喃糖基甲亚磺酸盐和对甲苯磺酸制备光学纯的[4-(3'-恶唑啉)]甲基甲基和对-甲苯磺酸亚砜(5R,5S,6R和6S)。对甲苯磺酸薄荷酯。使用-78°C的DIBAL / ZnCl 2成功实现了这些底物的非对映选择性的高度还原。以此方式,获得了四种op N-环己基-β-氨基-γ-羟基亚砜,它们是各种生物活性分子的不对称合成中的手性关键中间体。