A reaction of (4-fluoro-2-iodophenyl)acetic acid with 4-(trifluoromethyl)thiophenol gave the acid VIII which was cyclized with the reagent consisting from methanesulphonic acid and phosphorus pentoxide and afforded the methanesulphonic enol ester XIX. The alkaline hydrolysis resulted in 3-fluoro-8-trifluoromethyldibenzo[b,f]thiepin-10(11H)-one (XVI) which was transformed via the alcohol XXIV to the chloro derivative XXV. Substitution reactions with 1-methylpiperazine and 1-(2-hydroxyethyl)piperazine resulted in the title compounds IV and V. These products are very potent cataleptic neuroleptic agents with a prolongation of duration of the effects comparable to that of isofloxythepin and tefluthixol. A series of further synthetic experiments aimed at alternative syntheses of the acid VIII and the ketone XVI; their results were mostly not of use for preparative purpose but they led to isolation and characterization of a series of interesting heterocyclic products (XVII, XVIII, XXII, XXIII, XXIX-XXXI, XXXVI-XXXIX).
(4-氟-2-碘苯基)乙酸与4-(三氟甲基)硫代苯酚反应,生成酸VIII,然后与由甲磺酸和五氧化二磷组成的试剂环化,生成甲磺酸烯基酯XIX。碱性水解产生3-氟-8-三氟甲基二苯并[bf]噻吩-10(11H)-酮(XVI),通过醇XXIV转化为氯衍生物XXV。与1-甲基哌嗪和1-(2-羟乙基)哌嗪的取代反应产生IV和V。这些产物是非常有效的猫病性镇静剂,其效果持续时间延长,与异氟沙替平和替氟西乐相当。一系列进一步的合成实验旨在寻找酸VIII和酮XVI的替代合成方法;它们的结果大多数并没有用于制备目的,但导致了一系列有趣的杂环产物(XVII、XVIII、XXII、XXIII、XXIX-XXXI、XXXVI-XXXIX)的分离和表征。