New steroids have, at the 17-position, -OZ and -C(CH3)=N-R20 or-OZ and (C(CH2Hal)=N-R20 (or are tautomers or acylates thereof), or -OH and -CN or -OZ and -CN substituents, in which Z is a blocking group and R20 is trialkylsilyl. The cyanohydrins can be converted to the enamide/enimide derivatives by methylation, and the products can be converted to oxazolines by reaction with acid.
新的类
固醇在 17 位上具有-OZ 和-C(
CH3)=N-R20 或-OZ 和(C(CH2Hal)=N-R20(或其同系物或酰化物)),或-OH 和-CN 或-OZ 和-CN 取代基,其中 Z 是封端基团,R20 是三烷基
硅基。 通过甲基化可将
氰基卤素转化为烯酰胺/烯
亚胺衍
生物,通过与酸反应可将产物转化为
噁唑啉。