A Different Role of Meldrum's Acid in the Biginelli Reaction
作者:Jan Svĕtlík、Lucia Veizerová
DOI:10.1002/hlca.201000193
日期:2011.2
A Biginelli‐type condensation using Meldrum's acid has been accomplished in refluxing AcOH to give 6‐substituted dihydropyrimidine‐2,4‐(1H,3H)‐diones. In contrast to other aldehydes, the three‐component reaction with salicylaldehyde led to an oxygen‐bridged pyridine. A reaction mechanism is proposed.