申请人:AMERICAN CYANAMID COMPANY
公开号:EP0010851A2
公开(公告)日:1980-05-14
There is disclosed a process for the preparation of tetramisole which comprises the steps of:
(a) reacting an arylvinyl oxide having the formula:
with an alkoxyethylamine having the formula: R1-O-(CH2)2-NH2 to obtain a novel N-(arylhydroxyalkyl)-alkoxyethylamine having the formula:
wherein Ar is phenyl and R, is a lower alkyl group,
(b) reacting the latter N-substitued alkoxyethylamine with a nitrile having the formula R2C≡N, where R2 is hydrogen, alkyl, or aryl to obtain a novel amidoamine having the formula: R2-CO-NH-CH(Ar)CH2-NH-CH2CH2-OR1,
(c) hydrolyzing the latter amidoamine to obtain a novel diamine having the formula
(d) reacting the resultant diamine with carbon disulfide to obtain a dithiocarbamate,
(e) heating the latter dithiocarbamate to produce a thione having the formula;
(f) further reacting the thione with an acid having the formula HA to provide an imidazothiazole having the formula: -
where A is an anion of a pharmaceutically acceptable acid, and
(g) thereafter, neutralizing said tetramisole salt to obtain tetramisole per se.
The invention also provides a process for resolving the novel diamines obtained in step (c).
本发明公开了一种制备四咪唑的工艺,该工艺包括以下步骤
(a) 式如下的芳基乙烯基氧化物与式如下的烷氧乙胺反应
的烷氧基乙胺反应:R1-O-(CH2)2-NH2反应,得到新的N-(芳基羟烷基)-烷氧基乙胺,其式为
其中 Ar 为苯基,R 为低级烷基、
(b) 将后一种 N-取代的烷氧基乙胺与式 R2C≡N(其中 R2 为氢、烷基或芳基)的腈反应,得到一种新型氨基胺,其式为R2-CO-NH-CH(Ar)CH2-NH-CH2CH2-OR1,
(c) 将后一种氨基胺水解,得到式如下的新型二胺
(d) 将生成的二胺与二硫化碳反应,得到二硫代氨基甲酸乙酯、
(e) 加热后一种二硫代氨基甲酸酯,生成式如下的硫酮;
(f) 将硫酮与式 HA 的酸进一步反应,得到式如下的咪唑噻唑:-
其中 A 是药学上可接受的酸的阴离子,以及
(g) 然后中和所述四咪唑盐,得到四咪唑本身。
本发明还提供了一种分解步骤(c)中得到的新型二胺的工艺。