A general route to N′-(2,2-difluoro-3-hydroxyalkanoyl) nornicotines
作者:Hiroshi Fukuda、Tomoya Kitazume
DOI:10.1016/0022-1139(95)03268-i
日期:1995.10
The preparation of a variety of N′-(2,2-difluoro-3-hydroxyalkanoyl) nornicotines via a Reformatsky-type reaction of ethyl bromodifluoroacetate with aldehydes is described. The difluoromethylene unit may be regarded as an isopolar and isosteric replacement for ether oxygen.