The reactions of 3-[N-chloracetylamino-N-(4-nitrophenyl)]-2-formylindole (1a) with 2-(N, N-dialkylamino)ethylamines afford complex condensation products 7b,c consisting of two similar but not identical diazepinoindole fragments. For the reaction of compound 1a with 3-(N,N-diethylamino)propylamine, the process occurs in a different manner, and the predominant product is 4-ethylaminopropyl-1-(4-nitrophenyl)-2-oxo-1,2,3,4,5,6-hexahydro[1,4]diazepino[6,5-b]indole hydrocloride (14). Two routes of these unexpected transformations were proposed. The structures of the synthesized products were proved by the 1sH and 13C NMR, HMBC, and HSQC (direct proton-carbon correlation) spectra.
3-[N-
氯乙酰
氨基-N-(4-
硝基苯基)]-2-甲酰基
吲哚(1a)与2-(N,N-二烷基
氨基)
乙胺的反应生成复杂的缩合产物7b,c,由两个相似但不相同的二氮杂
吲哚片段组成。对于化合物1a与3-(N,N-二乙基
氨基)
丙胺的反应,反应过程以不同的方式进行,主要产物是4-乙基
氨基丙基-1-(4-
硝基苯基)-2-氧代-1,2,3,4,5,6-六氢[1,4]二氮杂
吲哚[6,5-b]
吲哚盐酸盐(14)。提出了两种意想不到的转化途径。合成产物的结构通过1sH和13C NMR、HMBC和HSQC(直接质子-碳相关)光谱进行了验证。