The base catalyzed condensation of 4-chloronitrobenzene with 2-(cyanomethyl)-6,7,8,9-tetrahydro-5H-benzocycloheptene afforded the 2,1-benzisoxazole derivative VIa which was reduced with iron in acetic acid to the 2-aminophenone VIIa. Its oxime IXa was treated with chloroacetyl chloride in acetic acid and gave the 4-substituted 6-chloro-2-chloromethylquinazoline 3-oxide (Xa). The treatment with methylamine in methanol led to the substitution reaction with a simultaneous ring elargement and the title compound IVa was formed. A similar reaction with 1-methylpiperazine proceeded without rearrangement resulting in the quinazoline XIa. The object of further experiments was the preparation of the lactam Va, the norpethidine derivative XV and some new approaches to intermediates useful in the synthesis of 5-(2-chlorophenyl)-7ethyl-1,3-dihydrothieno[2,3-e]-1,4-diazepin-2-ones.
4-
氯硝基苯与2-(
氰甲基)-6,7,8,9-四氢-5H-苯并
环庚烯在碱催化下缩合,得到2,1-苯并
异噁唑衍
生物VIa,用
乙酸中的
铁还原后得到2-
氨基苯酮VIIa。它的
肟IXa在
乙酸中用
氯乙酰氯处理后,得到4-取代的6-
氯-2-
氯甲基
喹唑啉3-氧化物(Xa)。用
甲醇中的
甲胺处理后,发生了取代反应和同时的环扩张,形成了目标化合物IVa。与1-甲基
哌嗪进行类似的反应,没有发生重排反应,结果得到了
喹唑啉XIa。进一步实验的目的是制备内酰胺Va,诺
哌替啶衍
生物XV和一些新的中间体,这些中间体对于合成5-(2-
氯苯基)-7-乙基-1,3-二氢
噻吩[2,3-e]-1,4-二氮杂
环己烷-2-酮非常有用。