申请人:AB LEO
公开号:EP0138153A2
公开(公告)日:1985-04-24
This invention relates to a selective acylation process for the preparation of phenolic N-disubstituted carbamate esters of steroids, comprising reacting in an inert solvent an acylating agent being a carbamoyl halogenide, a 4-(tertiary amino)-pyridine, or a complex thereof, optionally as a part of a polymer and a steroid having at least two free hydroxy groups, where at least one is phenolic and at least one is alcoholic, optionally in the presence of an acid acceptor.
本发明涉及一种制备类固醇的酚类 N-二取代氨基甲酸酯的选择性酰化工艺,包括在惰性溶剂中使氨基甲酰基卤化物、4-(叔氨基)-吡啶或其复合物的酰化剂(可选择作为聚合物的一部分)与具有至少两个游离羟基的类固醇(其中至少一个是酚基,至少一个是醇基)反应,可选择在有酸接受体存在的情况下进行。