A Convenient Preparation of 8-Ethyl-4,9-dihydro-3H-pyrano[3,4-b]indole-1-one, Key Intermediate of the Antiinflammatory Agent Etodolac
作者:Asensio González
DOI:10.1080/00397919108020835
日期:1991.3
A facile synthesis of 8-ethyl-4,9-dihydro-3H-pyrano [3,4-b]indole-1-one 5 is described which features the condensation of hydrazines with 2-oxo-5-hydroxypentanoic acid, followed by Fischer cyclization of these adducts.