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Communication | Regular issue | Vol 24, No. 11, 1986, pp.3023-3026
Published online, 1st January, 1970
DOI: 10.3987/R-1986-11-3023
The Structural Study on 2-Aminodihydropyrimidine Derivatives

Yong Hae Kim* and Hyoung Rae Kim

*Department of Applied Chemistry, Korea Advanced Institute of Science and Technology, P.O.Box 150 Chong-Yang-ni, Seoul 131, Korea

Abstract

The structures of dihydropyrimidines synthesized from mono- or dialkyl-guanidine with methyl acrylate were assigned as 1-alkyl-2-amino-(6b) or 1-alryl-2-alkylamino-5,6-dihydropyrirmidin-4-one(6d) by comparing 1H nmr, ir, and uv spectral data with those from 6b and 6d synthesized by the other route. The λmax values of the dihydropyrimidines showed significant differences from those of the hydrochlorides whose significant blue shifts are thought to be a good evidence and a tool for the conjugative system of the two double bonds in 2-aminodihydropyrimidines.