Starting from 2-chloronitrobenzene and 2-fluorothiophenol, the synthesis of 2-bromo-2'-fluorodiphenyl sulfide (X) was carried out in three steps. The product was converted to the Grignard reagent which reacted with 1-ethoxycarbonyl-4-piperidone and gave the alcohol XIII. Cyclization of this compound with sodium hydride in dimethylformamide afforded 1-ethoxycarbonylspiro(piperidine-4,6'-dibenz[b,e]-1,4-oxathiepin) (V) which was hydrolyzed to the title compound IV. Reduction of compound V with sodium dihydridobis(2-methoxyethoxy)aluminate afforded the 1-methyl derivative III which exhibited antireserpine activity and showed the pharmacological profile of a potential antidepressant.
从2-氯硝基苯和2-氟硫代苯酚开始,合成了2-溴-2'-氟二苯基硫(X)的过程分为三个步骤。产物转化为格氏试剂,与1-乙氧羰基-4-哌啶酮反应,得到醇XIII。将该化合物与二甲基甲酰胺中的氢化钠进行环化反应,得到1-乙氧羰基螺(piperidine-4,6'-dibenz[b,e]-1,4-噁硫杂环己烷)(V),经水解得到标题化合物IV。将化合物V还原为二甲氧基乙氧基铝酸钠还原剂,得到1-甲基衍生物III,表现出抗利血平活性并显示出潜在抗抑郁药物的药理特性。