Abstract
AbstractA new approach to 2‐amino‐6‐(methoxycarbonyl)amino‐4‐(1,2,3,6‐tetrahydro‐1‐pyridyl)pyrimidine 1‐oxide (3) is described. Methyl [1‐ethoxy‐2‐(ethoxycarbonyl)‐ethylidene]carbamate (5) reacted with guanidine to the pyrimidinecarbamate 6, which was successively transformed into methyl 2‐amino‐6‐(p‐tolyslulfonyl)oxy‐4‐pyrimidinecarbamate (8). Oxidation of 8 led to the corresponding pyrimidine N‐oxide 9, a useful starting material to 3.
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