Synthesis of Flavans :One-Pot Synthesis of Flavans From 4-Methylcoumarins
作者:Vijayendra P. Kamat、Ratnakar N. Asolkar、Janardan K. Kirtany
DOI:10.1080/00397919808004523
日期:1998.12
Abstract 4-Methylcoumarins (2), obtained by condensation of suitable phenols (1) with ethyl acetoacetate in the presence of sulfuric acid, lead directly to flavans (3) when refluxed with sodium hydroxide and ethanediol.