申请人:Koller Herbert
公开号:US20120116125A1
公开(公告)日:2012-05-10
Method of preparing 1-amino-1,3,3,5,5-pentamethylcyclohexane or pharmaceutically acceptable salt thereof, comprising at least two steps selected from the following steps (i) to (iv):
(i) converting isophorone to 3,3,5,5-tetramethylcyclohexanone in the presence of methylmagnesium chloride;
(ii) converting 3,3,5,5-tetramethylcyclohexanone to 1-hydroxy-1,3,3,5,5-pentamethylcyclohexane in the presence of methylmagnesium chloride;
(iii) converting 1-hydroxy-1,3,3,5,5-pentamethylcyclohexane to 1-chloroacetamido-1,3,3,5,5-pentamethylcyclohexane in the presence of chloroacetonitrile in acidic solution;
(iv)converting 1-chloroacetamido-1,3,3,5,5-pentamethylcyclohexane to 1-amino-1,3,3,5,5-pentamethylcyclohexane in the presence of thiourea in water.
制备1-
氨基-1,3,3,5,5-五
甲基环己烷或其药学上可接受的盐的方法,包括至少从以下步骤(i)到(iv)中选择两个步骤:
(i)在
甲基氯化镁的存在下将异佛农转化为
3,3,5,5-四甲基环己酮;
(ii)在
甲基氯化镁的存在下将
3,3,5,5-四甲基环己酮转化为1-羟基-1,3,3,5,5-五
甲基环己烷;
(iii)在酸性溶液中,将1-羟基-1,3,3,5,5-五
甲基环己烷与
氯乙腈转化为1-
氯乙酰胺基-1,3,3,5,5-五
甲基环己烷;
(iv)在
水中,将1-
氯乙酰胺基-1,3,3,5,5-五
甲基环己烷与
硫脲转化为1-
氨基-1,3,3,5,5-五
甲基环己烷。