Acids IIa-c were prepared by reactions of (4-fluoro-2-iodophenyl)acetic acid with 4-methoxythiophenol, 4-ethoxythiophenol and 4-(ethylthio)thiophenol and cyclized with polyphosphoric acid in boiling toluene to dibenzo[b,f]thiepin-10(11H)-ones IIIa-c. Reduction with sodium borohydride afforded the alcohols IVa-c which were treated with hydrogen chloride and gave the chloro derivatives Va-c. Substitution reactions with 1-methylpiperazine resulted in the title compounds Ia-c out of which the methoxy derivative Ia was transformed by demethylation with boron tribromide to the phenol Id. Compounds Ia-d are very potent neuroleptics exhibiting a clear prolongation of the central depressant and some prolongation of the cataleptic activity.
酸IIa-c是通过将(4-氟-2-碘苯基)乙酸与4-甲氧基噻吩酚、4-乙氧基噻吩酚和4-(乙硫基)噻吩反应,并在沸腾甲苯中用多聚磷酸环化得到二苯并[b,f]噻吩-10(11H)-酮IIIa-c。用硼氢化钠还原得到醇IVa-c,经过氯化氢处理得到氯代衍生物Va-c。与1-甲基哌嗪的取代反应产生了标题化合物Ia-c,其中甲氧基衍生物Ia通过三溴化硼的去甲基化反应转化为酚Id。化合物Ia-d是非常有效的神经抑制剂,具有明显的中枢抑制和一定的僵硬活动延长作用。