Cyclic Sulfur Ylides Derived from Gleason-Type Chiral Auxiliaries for the Asymmetric Synthesis of Epoxy Amides
作者:Francisco Sarabia、Carlos Vivar-García、Miguel García-Castro、Jorge Martín-Ortiz
DOI:10.1021/jo1025964
日期:2011.5.6
Gleason-type chiral auxiliaries were used for the synthesis of a novel class of sulfonium salts, obtained via methylation of the sulfide with Meerwein's salt. The salts were reacted with aldehydes under basic conditions to provide epoxy amides, which were reduced to their corresponding epoxy alcohols in excellent enantiomeric excesses. Interestingly, it was feasible to synthesize both enantiomeric
格里森型手性助剂用于合成一类新型的salts盐,该via盐是通过用Meerwein盐将硫化物甲基化而获得的。该盐在碱性条件下与醛反应,得到环氧酰胺,将其以优异的对映体过量还原为相应的环氧醇。有趣的是,它是合成两个对映异构体的环氧醇,这取决于所述锍盐的可行的,从制备升α-氨基酸(6和9从升-缬氨酸或15和16从升-丝氨酸)中的溶液使用。