The reaction of 2,3-dichlorothiophenol with 2-iodobenzoic acid gave 2-(2,3-dichlorophenylthio)benzoic acid (V) which was transformed in four steps to the homological acid IX. Cyclization resulted in 6,7-dichlorodibenzo[b,f]thiepin-10(11H)-one (X) which was converted via the alcohol XI to the trichloro compound XII. Substitution reactions of XII with 1-methylpiperazine and 1-(2-hydroxyethyl)piperazine afforded the title compound I and its hydroxyethyl analogue II. Reaction of the ketone X with 1-methylpiperazine and titanium tetrachloride gave the enamine III. Compounds I-III exhibit mild central depressant and relatively strong cataleptic activity.
2,3-二氯硫酚与2-碘苯甲酸反应生成2-(2,3-二氯苯硫基)苯甲酸(V),经过四步转化得到同系物酸IX。环化反应得到6,7-二氯二苯并[bf]噻吩-10(11H)-酮(X),通过醇XI转化为三氯化合物XII。XII与1-甲基哌嗪和1-(2-羟乙基)哌嗪发生取代反应,得到标题化合物I及其羟乙基类似物II。酮X与1-甲基哌嗪和四氯化钛反应生成烯胺III。化合物I-III具有轻度中枢抑制和相对强烈的强直活性。