Diazotization of 4-fluoroanthranilic acid (V) and the following reaction with sodium disulfide gave the dithio diacid VII which was reduced with lithium aluminium hydride to 4-fluoro-2-mercaprobenzyl alcohol (XI). Its reaction with 2-chloro-5-iodothiophene afforded the alcohol XIII which was transformed via the chloride XIV and the nitrile XV to [2-(5-chloro-2-thienylthio)-4-fluorophenyl]acetic acid (XVI). Cyclization with phosphorus pentoxide in toluene resulted in 2-chloro-8-fluorothieno[2,3-b]-1-benzothiepin-4(5H)-one (XVIII) which was converted via the alcohol XIX to the chloro derivative XX. The substitution reaction with 1-methylpiperazine led to the title compound IV which is a long-acting and very potent tranquillizer but did not reveal, in the animal tests performed, the properties of a neuroleptic agent.
对4-氟基氨基苯甲酸(V)进行重氮化反应,然后与二硫化钠发生反应,得到二硫基二酸(VII),再用氢化铝锂还原为4-氟-2-巯基苯甲醇(XI)。它与2-氯-5-碘噻吩发生反应,生成醇(XIII),然后转化为氯化物(XIV)和腈(XV),最终合成[2-(5-氯-2-噻吩硫基)-4-氟苯基]乙酸(XVI)。在甲苯中与五氧化二磷发生环化反应,得到2-氯-8-氟噻吩[2,3-b]-1-苯并噻吩-4(5H)-酮(XVIII),再通过醇(XIX)转化为氯衍生物(XX)。与1-甲基哌嗪的取代反应产生了标题化合物(IV),它是一种长效和非常有效的镇静剂,但在动物测试中并未显示出神经阻滞剂的特性。