One-step solvent-free synthesis of fluoroalkyl-substituted 4-hydroxy-2-oxo(thioxo)hexahydropyrimidines in the presence of 1-butyl-3-methylimidazolium tetrafluoroborate
摘要:
A convenient procedure has been developed for the synthesis of fluoroalkyl-substituted 6-aryl-4-hydroxy-2-oxo-(thioxo)hexahydropyrimidine derivatives by three-component condensation of fluorinated beta-dicarbonyl compounds with aromatic aldehydes and urea or thiourea in the absence of a solvent using 6 mol% of 1-butyl-3-methylimidazolium tetrafluoroborate as catalyst.