This invention provides a method for preparing a hydroxyalkyl tropane ester, comprising: (a) contacting a tropane and 1,1′-carbonyldiimidazole to produce an activated tropane ester; (b) contacting the activated tropane ester with an excess of an alkanediol to form a reaction mixture; and (c) maintaining the reaction mixture at a temperature and for a sufficient time for the activated tropane ester to react with the alkanediol to form the corresponding hydroxyalkyl tropane ester. This method may be used to produce hydroxyalkyl derivatives of tropanes such as benzoylecgonine, ecgonine and ecgonidine.
本发明提供了一种制备羟基烷基托烷酯的方法,包括:(a)将托烷和1,1′-羰基二
咪唑接触,生成活化的托烷酯;(b)将活化的托烷酯与过量的烷二醇接触,形成反应混合物;(c)将反应混合物保持在一定的温度和足够的时间,使活化的托烷酯与烷二醇反应,形成相应的羟基烷基托烷酯。这种方法可用于生产托烷的羟烷基衍
生物,如苯甲酰
可可碱、埃可宁和埃
可尼丁。