The present technology relates to an improved one-stage method for producing azoniaspironortropine esters such as trospium chloride by reacting an endonortropine compound with an organic dihalogen compound and an a-hydroxycarboxylic acid in the presence of a base and 1,1′ carbonyldiimidazole or 1,1′ thiocarbonyldiimidazole or thionyldiimidazole. The present technology also relates to an improved method for producing nortropan-3-one compounds or their hydrohalides (such as N-benzyltropanone hydrochloride) by reacting an amine and a protected dialdehyde with a basic aqueous solution of 1,3-acetone dicarboxylic acid.
目前的技术涉及一种改进的单阶段方法,用于通过在碱和1,1′-碳
酰亚胺或1,1′-
硫代碳
酰亚胺或
硫代
亚胺的存在下,将内莫曲平化合物与有机二卤化合物和α-羟基
羧酸反应来生产阿唑环螺烷酯,如
氯托斯匹。该技术还涉及一种改进的方法,用于通过将胺和受保护的二醛与
1,3-丙酮二羧酸的碱性
水溶液反应来生产莫曲平-3-酮化合物或其氢卤化物(如N-苄基莫曲平酮盐酸盐)。