Behaviour of 3(3-indolylmethylene)-5-aryl-2(3<i>H</i>)-furanones as Alkylating Agents: Intra- Versus Inter-Molecular Alkylation
作者:Wael S.I. Abou-Elmagd
DOI:10.3184/030823407x217652
日期:2007.5
5-Aryl-3-(3-indolylmethylene)-2(3H)-furanones (6a–c) were prepared as a mixture of (E) and (Z) stereoisomers by condensing indole-3-carboxaldehyde with 3-aroylpropanoic acids using thionyl chloride in N,N-dimethylformamide as cyclodehydrating agent. The reaction of the furanones 6a and 6b with anhydrous aluminium chloride in benzene, toluene or anisole led to the formation of 4,4-diaryl-1-(3-indolyl)buta-1
5-Aryl-3-(3-indolylmethylene)-2(3H)-furanones (6a-c) 制备为 (E) 和 (Z) 立体异构体的混合物N,N-二甲基甲酰胺中的亚硫酰氯作为环脱水剂。呋喃酮 6a 和 6b 与无水氯化铝在苯、甲苯或苯甲醚中的反应导致形成 4,4-二芳基-1-(3-吲哚基)丁-1,3-二烯-2-羧酸 (7 ) 作为几何 (E, E- 和 E, Z-) 立体异构体的混合物,通过分子间烷基化模式。呋喃酮6c在相同反应条件下通过分子内烷基化得到1-(4-甲氧基苯基)咔唑-3-羧酸(8)。这代表了一种合成咔唑衍生物的新方法。