The invention relates to a new process for the preparation of propargyl ammonium chlorides of the general Formula I
by alkaline decomposition of the d-tartarate of the 1-isomer of an amine of the general Formula II
and subsequent reaction of the amine of the general Formula II with a halide of the general Formula III
in the presence of an organic solvent, alkali and water /in which general Formulae
n is 1 or 0 and
X stands for halogen/
which comprises reacting the d-tartarate of the 1-isomer of an amine of the general Formula II in aqueous suspension with an alkali, dissolving the base of the general Formula II, thus set free without isolation in a water non-miscible organic solvent and reacting the same in the said phase with a halide of the general Formula III, and thereafter - preferably after separating the aqueous layer - reacting the mixture which contains the amines of the general Formulae II and IV
in the organic phase in the presence of water with an organic acid or a solution which has a pH value of 1.5-6 and consists of an inorganic acid and water, thus dissolving in the two-phase mixture formed the salt of the amine of the general Formula II in the aqueous layer and selectively separating the amine of the general Formula II from the amine of the general Formula IV, and thereafter adding after the separation of the phases hydrogen chloride to the amine of the general Formula IV being in the organic phase and thus precipitating the salt of the general Formula 1.
The compounds of the general Formula I are known pharmaceutical active ingredients. The advantage of the process of the present invention that it is highly economical and enables the recovery of the starting materials on large scale production too.
本发明涉及一种制备通式 I
丙炔基
氯化铵的新工艺
通过通式 II 的胺的 1-异构体的 d-
酒石酸盐的碱性分解
通式 II 的胺随后与通式 III 的卤化物反应
在有机溶剂、碱和
水的存在下/其中通式为
n 为 1 或 0,且
X 代表卤素
其中包括在
水悬浮液中将通式 II 的胺的 1-异构体的 d-
酒石酸盐与碱反应,将通式 II 的碱溶解在不与
水混溶的有机溶剂中,并在上述相中与通式 III 的卤化物反应,然后--最好在分离
水层后--将含有通式 II 和 IV 的胺的混合物反应
在有机相中,在有
水存在的情况下,与有机酸或 pH 值为 1.5-6 的由
无机酸和
水组成的溶液反应,从而在形成的两相混合物中溶解
水层中的通式 II 的胺盐,并选择性地分离通式 II 的胺和通式 IV 的胺,然后在两相分离后向有机相中的通式 IV 的胺中加入
氯化氢,从而沉淀出通式 1 的盐。
通式 I 的化合物是已知的药物活性成分。本发明工艺的优点是非常经济,而且可以在大规模生产中回收起始原料。