61. Synthesis of 2-Oxo-2H-oxadiazolo-pyrimidine-5-carbamates
Thermal cyclization of the pyrimidine-N-oxide dicarbamate 2 gives a 95:5 mixture of the 2-oxo-2H-oxadiazolo- and pyrimidinecarbamates 3 and 4.An efficient procedure for the conversion of 3 to 4, and vice versa, is described.
Hengartner, Urs,Muller, Jean-Claude,Ramuz, Henri
p. 669 - 672
(2007/10/02)
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