One-Pot Synthesis of 2,5-Bis(3-indolyl)-3,4-dinitrothiophene, 3-(2-Chloro-3,4-dinitrothien-2-yl)indole and Related Congeners
作者:Ismail I. Fasfous、Mustafa M. El-Abadelah、Salim S. Sabri
DOI:10.2174/157017811799304124
日期:2011.12.1
Direct interaction of indolylzinc chloride with 2,5-dichloro-3,4-dinitrothiophene (4) produced 2,5-bis(indol-3- yl)-3,4-dinitrothiophene (5) together with 3-(5-chloro-3,4-dinitrothien-2-yl)indole (6). Interaction of the latter compound with 1-methylpiperazine gave 3-[4,5-di(4-methylpiperazin-1-yl)-3-nitrothien-2-yl]indole (7), as the expected SN-Ar (addition-elimination) di-substitution product, together with 3-[5-(4-methylpiperazin-1-yl)-3-nitrothien-2-yl]indole (8), a mono-substituted product. The formation of 8 probably proceeds via an anomalous pathway, related to cine-substitution, with departure of the nitro group at C-4. Compound 4 underwent SN-Ar substitution reaction with 1-methylpiperazine to give the respective 2,5-di-(4-methylpiperazin-1-yl)-2,4-dinitrothiophene (9).
吲哚基氯化锌与 2,5-二氯-3,4-二硝基噻吩 (4) 直接作用,生成 2,5-双(吲哚-3-基)-3,4-二硝基噻吩 (5) 以及 3-(5-氯-3,4-二硝基噻吩-2-基)吲哚 (6)。后一种化合物与 1-甲基哌嗪作用后,得到了 3-[4,5-二(4-甲基哌嗪-1-基)-3-硝基噻吩-2-基]吲哚(7),这是一种预期的 SN-Ar(加成-消除)二取代产物,同时还得到了 3-[5-(4-甲基哌嗪-1-基)-3-硝基噻吩-2-基]吲哚(8),这是一种单取代产物。8 的形成可能是通过一种异常途径进行的,与 C-取代有关,硝基离开了 C-4 位。化合物 4 与 1-甲基哌嗪发生 SN-Ar 取代反应,得到相应的 2,5-二(4-甲基哌嗪-1-基)-2,4-二硝基噻吩(9)。