New intermediates in the self-condensation of. beta.-aminocrotonamide

SC Shim, DW Kim, SS Moon…

Index: Shim, Sang Chul; Kim, Dae-Whang; Moon, Surk-Sik; Chae, Young Bok Journal of Organic Chemistry, 1984 , vol. 49, # 8 p. 1449 - 1450

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Citation Number: 9

Abstract

amide (4), which is difficult to isolate, although isolation of some divinylamines similar to 4 has been rep~ rted.~ Compounds 2 and 3 are interconvertible to each other, reaching the equilibrium from 2 and 3 in 20 and 60 min, respectively, at 110" C in dimethyl sulfoxide= 4.88). Prolonged heating of the equilibrium mixture of 2 and 3 at 110" C yields 6. Both 2 and 3 yield the pyrimidone 6 in quantitative yields by heating at 180" C. The reaction pathway ...