The present invention relates to a process for the preparation of benzothiazepine derivatives of general formula I ##STR1## wherein R stands for hydrogen and acetyl or of acid addition salts thereof in which a corresponding compound of general formula II ##STR2## in which R has the same meaning as above is reacted with 2-(dimethylamino)-ethyl chloride in a biphasic system of water and a non-combustible aliphatic polychlorinated hydrocarbon solvent in the presence of calcium hydroxide or of barium hydroxide. The process is advantageously performed at a temperature between 15.degree. and the refluxing temperature of the aliphatic polychlorinated hydrocarbon solvent. The process is optionally performed in the presence of a suitable quaternary ammonium halide. In the process the amount of calcium hydroxide or barium hydroxide is advantageously 1-3 moles per 1 mole of the compound of general formula II, the amount of aliphatic polychlorinated hydrocarbon solvent is advantageously 15-40 ml and that of water 3-10 ml per g of the compound of general formula II and the ratio aliphatic chlorinated hydrocarbon solvent:water is advantageously 2:1 to 10:1.
本发明涉及一种制备通式I的
苯并噻吩衍
生物的过程,其中R代表氢和乙酰或其酸加成盐,包括在
水和不可燃的脂肪族多
氯化烃溶剂的双相系统中,将通式II的相应化合物与2-(
二甲氨基)-乙基
氯化物反应,其中R具有与上述相同的含义,并在
氢氧化钙或
氢氧化钡的存在下进行。该过程优选在15℃至脂肪族多
氯化烃溶剂回流温度之间的温度下进行。该过程可选在适当的季
铵盐的存在下进行。在该过程中,
氢氧化钙或
氢氧化钡的量优选为通式II化合物的1-3摩尔,脂肪族多
氯化烃溶剂的量优选为15-40毫升,
水的量为每克通式II化合物3-10毫升,脂肪族
氯化氢溶剂:
水的比例优选为2:1至10:1。