Abstract
Treatment of 2-alkylaminopyrimidines (1) and (2) with ethoxycarbonyl isocyanate gave the acyclic urea derivatives, namely, 3-alkyl-1-ethyoxycarbonyl-3-(2-pyrimidyl)ureas (3) and (4), which cyclized to 1-alkyl-4-oxopyrimido-[1,2-a]-s-triazin-1-ium-2-olates (6) and (7) in refluxing p-xylene. Structural proof was obtained through spectral analyses, and an alternate synthesis in which (1) and (2) were reacted with phenoxycarbonyl isocyanate.
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More From: Journal of the Chemical Society, Perkin Transactions 1
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