ne to synthesize 1 and the condensation of 3-acetylindole-2- acetonitrile with ammonia to synthesize 2. The structures of γ-carbolines 1 and 2 were unambiguously established by comparing samples of each synthesized by the two different routes. A selective and one-step synthesis of ethyl 2-acetamido-3-(2-indolyl)alkanoates was newly exploited starting from diethyl acetamidomalonate and quaternary ammonium
致癌性γ-咔啉3-
氨基-1,4-二甲基-
5H-吡啶并[4,3-b]吲哚(1)和3-
氨基-1-甲基-
5H-吡啶并[4,3-b]吲哚( 2) 通过以下程序有效合成。关键方法涉及酸催化 2-乙酰
氨基-3-(2-
吲哚基) 链烷酸环化为 1,2-二氢-γ-咔啉。随后脱氢为 γ-咔啉
羧酸酯,酯基转化为羧基,最后通过 Curtius 重排转化为
氨基。替代方法包括 4-(1-苯并三唑基)-
3,6-二甲基-2-吡啶胺热解合成 1 和
3-乙酰吲哚-2-
乙腈与
氨缩合合成 2。 γ-咔啉的结构 1和 2 是通过比较两种不同途径合成的每种样品而明确建立的。