Reactions of 5-fluoro, 5-chloro- and 5-bromo-2-iodobenzoic acid with 4-isopropylthiophenol in solutions of potassium hydroxide in the presence of copper gave the acids VIIabc which were transformed via the intermediates VIIIabc-Xabc to 2-[5-halogeno-2-(4-isopropylphenylthio)-phenyl]acetic acids XIabc. Their cyclization with polyphosphoric acid resulted in 2-halogeno-8-isopropyldibenzo[b,f]thiepin-10(11H)-ones XIIabc.The 2-iodo ketone XIId was obtained from 2-(2-chloro-5-nitrophenyl)acetic acid by treatment with 4-isopropylthiophenol, by the following reduction of the resulting nitro acid XIe with hydrazine to the amino acid XIf, by its cyclization to the amino ketone XIIf and finally by its diazotization and reaction with potassium iodide. The ketones XIIa-d were reduced to the alcohols XIIIa-d giving by treatment with hydrogen chloride the chloro compounds XIVa-d. Substitution reactions with 1-methylpiperazine and 1-(2-hydroxyethyl)piperazine afforded the title compounds Vabc and VIa-d. Only the fluoro derivatives Va and VIa showed a clear cataleptic activity in rats. The other compounds are very little active in this line and the iodo derivative VId was found to be completely inactive in a high oral dose, but it revealed an intensive antidopaminergic action in biochemical tests. By its pharmacological profile it resembles the known noncataleptic neuroleptic agent clozapine.
5-
氟、5-
氯和
5-溴-2-碘苯甲酸与4-
异丙基硫酚在
氢氧化钾溶液中,在
铜的存在下反应,生成了酸
VIIabc,这些酸通过
中间体VIIIabc-
Xabc转化为2-[5-卤代-2-(4-
异丙基苯硫基)
苯基]
乙酸XIabc。它们与多
磷酸的环化反应产生了2-卤代-8-
异丙基二
苯并[
b,f]
噻吩-10(11
H)-
酮XIIabc。2-
碘代
酮XIId是通过
2-(2-氯-5-硝基苯基)乙酸与4-
异丙基硫酚反应,随后将生成的硝基酸
XIe用
肼还原为
氨基酸XIf,再通过其环化成
氨基
酮XIIf,最后通过重
氮化和与
碘化钾反
应得到的。
酮XIIa-d被还原为醇
XIIIa-d,通过与
氯化氢处理得到
氯化物
XIVa-d。与
1-甲基哌嗪和1-(2-羟乙基)
哌嗪的取代反
应得到了标题化合物
Vabc和
VIa-d。只有
氟代衍
生物Va和
VIa在大鼠中显示出明显的僵住活性。其他化合物在这方面活性很低,
碘代衍
生物VId在高口服剂量下被发现完全无活性,但它显示出强烈的抗
多巴胺能作用在生化测试中。根据其药理学特征,它类似于已知的非僵住性神经
安定剂
氯氮平。