A new approach is described for the synthesis of substi- tuted indoles 5, through an intramolecular and regioselective Friedel-Crafts cyclization of enaminones 6a-h catalyzed by Lewis acids. Compounds 6 were prepared from the 2-anilinocarbonyl compounds 7, by treatment with DMFDMA under thermal or mi- crowave (MW) irradiation conditions. An alternative and shorter one-pot two-step synthesis of indoles
描述了一种合成取代的
吲哚 5 的新方法,通过
路易斯酸催化的烯胺酮 6a-h 的分子内和区域选择性 Friedel-Crafts 环化。通过在热或微波 (MW) 辐射条件下用
DMFDMA 处理,由 2-
苯胺基羰基化合物 7 制备化合物 6。从化合物 7 开始并通过 MW 辐射促进了
吲哚 5 的替代和较短的一锅两步合成,包括难以捉摸的 2-乙酰
吲哚 5i-m。