6-Methyl-2-(3-methyl-5-oxo-2,5-dihydropyrazolyl)-pyrimidin-4(1H)-one as CH acid in Michael reaction
作者:A. V. Erkin、V. I. Krutikov
DOI:10.1134/s1070363209070214
日期:2009.7
Addition of 6-methyl-2-(3-methyl-5-oxo-2,5-dihydropyrazol-1-yl)pyrimidin-4(1H)-one, a compound with two CH-acidic centers, to 5-benzylidenepyrimidine-2,4,6(1H,3H,5H)-trione proceeds with the participation of the atom C-5 of pyrimidine ring. Under the realized reaction conditions the latter possesses a greater nucleophilicity as a result of the priority ionization. The obtained Michael adduct is unstable in the neutral aqueous medium and is decomposed into initial oxopyrazolylpyrimidinone, pyrimidine-2,4,6-(1H,3H,5H)-trione, and benzaldehyde.