of fusidic acid was confirmed. The Beckmann rearrangement of the oxime derivatives of 3- and 17-oxo-9β-steroids derived from fusidic acid was also investigated. In general, with the exception of the (E)-oxime of 17-oxotriacetate 13b, which resulted in a complex mixture of products, none of which predominated, all the oximes gave the normal Beckmann rearrangement products.
研究了衍生自
夫西地酸的(E)-11-
肟6的贝克曼重排途径,
夫西地酸是一种常见的9β-类
固醇,其B环受限于船形。发现当用
甲苯-对-磺酰基处理时,6被转化为甲基3- O-乙酰基-11- aza-11a-homo-11a-oxo-24,25-二氢fusidate 7,这是重排的“正常”产物。
吡啶中的
氯化物。X射线晶体学测定了7的结构和立体
化学。确认了
夫西地酸的绝对构型。还研究了衍生自
夫西地酸的3-和17-氧代9β-甾族化合物的
肟衍
生物的贝克曼重排。一般而言,除了(E17-三
氧代乙酸酯13b的
肟)生成复杂的产物混合物,但这些产物都不占主导地位,所有
肟都产生了正常的贝克曼重排产物。