Reaction of 3-fluorothiophenol with (2-iodophenyl)acetic acid gave the acid VIII which was cyclized with polyphosphoric acid to the ketone XII. The first title compound VI was prepared via the intermediates XV and XVIII. Treatment of the ketone XII with 1-methylpiperazine in the presence of titanium tetrachloride resulted in the enamine XXIII. The similarly prepared acid IX was cyclized to the ketone XIII. By-products were the di-acid X and the enol-lactone XXIV, affording by alkaline hydrolysis the keto acid XXV. The synthesis of the second title compound VII was carried out from the ketone XIII via the intermediates XVI and XIX. 10,11-Dihydrodibenzo[b,f]thiepin-3,11-diol (XVII) gave by treatment with methanesulfonyl chloride and by the following reaction with 1-methylpiperazine the salt of 1-methylpiperazine with dibenzo[b,f]thiepin-3-ol (XXII) and 1-methyl-4-(methylsulfonyl)piperazine (XXVI)). Whereas the compound VI has low central depressant and cataleptic activity, the corresponding enamine XXIII is very potent in both lines. The trifluoromethyl derivative VII has the character of a neuroleptic but its depressant and cataleptic activity are ten times lower than those of the 8-trifluoromethyl isomer.
3-氟硫代苯酚与(2-碘苯基)乙酸反应,生成酸 VIII,经过多磷酸环化得到酮 XII。第一个标题化合物 VI 是通过中间体 XV 和 XVIII 制备而成。将酮 XII 与1-甲基哌嗪在四氯化钛存在下处理,得到烯胺 XXIII。类似地制备的酸 IX 经过环化得到酮 XIII。副产物是二酸 X 和烯醇内酯 XXIV,经过碱水解得到酮酸 XXV。第二个标题化合物 VII 的合成是从酮 XIII 经过中间体 XVI 和 XIX 进行的。10,11-二氢二苯并[ b,f ]噻吩-3,11-二醇 (XVII) 经过甲磺酰氯处理,并通过与1-甲基哌嗪反应生成1-甲基哌嗪与二苯并[ b,f ]噻吩-3-醇盐 (XXII) 和 1-甲基-4-(甲磺酰基)哌嗪 (XXVI)。化合物 VI 具有较低的中枢抑制和痉挛活性,相应的烯胺 XXIII 在这两方面非常强效。三氟甲基衍生物 VII 具有神经阻滞剂的特性,但其抑制和痉挛活性比 8-三氟甲基异构体低十倍。