3-Formylchromones in Guareschi Synthesis of 5-(2-hydroxybenzoyl)-2-pyridones
作者:Dmitriy M. Volochnyuk、Sergey V. Ryabukhin、Andrey S. Plaskon、Andrey A. Tolmachev
DOI:10.1055/s-2004-832852
日期:——
A set of 5-(2-hydroxybenzoyl)-pyrid-2-ones, which are analogous to cardiotonic drugs such as milrinone, has been prepared in high yield by recyclization of 3-formylchromones with acetic acid amides having at the α-position an electron-withdrawing group. The best reaction conditions were found to be heating in DMF in the presence of Me3SiCl as a promoter and water scavenger.