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Abstract
AbstractThe preparation of several derivatives of 4‐methylaminopyrimidine is described. When 2‐chloro‐4‐methylamino‐5‐nitropyrimidine is treated with aqueous sodium hydrogen sulphide, not only is the expected 5‐amino‐2‐mercapto‐4‐methylaminopyrimidine formed but also 5‐amino‐2: 6‐dimercapto‐4‐methylaminopyrimidine. Improved ways of making 5‐aminocytosine (4: 5‐diamino‐2‐hydrpxypyrimidine) and 2: 4: 5‐triaminopyrimidine, viz. by catalytic reduction of the corresponding 5‐nitro compounds, are reported.
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