Synthesis of functionalized 2-aryl-4-(indol-3-yl)-4H-chromenes via iodine-catalyzed domino Michael addition–intramolecular cyclization reaction
作者:Guodong Yin、Ling Fan、Tianbing Ren、Chunyang Zheng、Qing Tao、Anxin Wu、Nengfang She
DOI:10.1039/c2ob26642c
日期:——
An efficient synthesis of novel functionalized 2-aryl-4-(indol-3-yl)-4H-chromenes has been developed, in the presence of a catalytic amount of iodine, from easily available starting materials, 2-hydroxychalcone derivatives. Indole, substituted indoles and 7-azaindole are suitable for this transformation. The possible domino Michael additionâintramolecular cyclization reaction mechanism is proposed.