Abstract
A facile method for the synthesis of tetrahydropyrimidines is described. Diethylamine was treated with methyl propiolate to provide Michael adduct (β-amino acrylate). In the presence of organic acid, the cyclization between imines with β-aminoacrylateoccurred at room temperature and completed within several minutes to give tetrahydropyrimidines with liberation of ammonium salt. Formaldimines show good toleration to the reaction.
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