Polyphosphate Ester-Mediated Synthesis of Dihydropyrimidines. Improved Conditions for the Biginelli Reaction
作者:C. Oliver Kappe、S. Fabio Falsone
DOI:10.1055/s-1998-1764
日期:1998.7
Dihydropyrimidines 7 are prepared in high yield by a one-pot condensation of aldehydes, acetoacetates, and ureas using a polyphosphate ester-mediated cyclocondensation reaction. Yields are significantly higher than utilizing classical Biginelli reaction conditions.