1,2,3,4-Tetrahydropyrimidines and some other compounds based on propiolic acid derivatives
The reactions of ethyl propiolate and propiolamide with methylene and benzaldehyde and anisaldehyde in an acidic medium, in which the corresponding 2-oxo-1,2,3,4-tetrahydropyrimidines and 1,4-dihydropyridines or a 3,4-dihydropyrimidine derivative are formed, were studied.