New facilities of Biginelli reaction. Synthesis of methyl 6-aryl-5-benzoyl-4-methoxy-2-oxohexahydropyrimidine-4-carboxylates

Аннотация

Three-component reaction of methyl benzoylpyruvate, aromatic aldehyde, and urea in methanol in the presence of sodium bisulfate stops at the stage of the formation of nondehydrated product with a methylated tertiary hydroxy group and results in methyl 6-aryl-5-benzoyl-4-methoxy-2-oxohexahydropyrimidine-4-carboxylates.