An efficient ZnO-catalyzed synthesis of novel indole-annulated thiopyrano-chromene derivatives via Domino Knoevenagel-hetero-Diels–Alder reaction
作者:Mostafa Kiamehr、Firouz Matloubi Moghaddam
DOI:10.1016/j.tetlet.2009.09.106
日期:2009.12
An efficient synthesis of pentacyclic indole derivatives is achieved viadominoKnoevenagel-hetero-Diels–Alderreactions of indolin-2-thiones and O-propargylated salicylaldehyde derivatives in CH3CN in the presence of 10 mol % of ZnO as a heterogeneous catalyst. The products are formed in good to excellent yields.