FEBRUARY 1961 REARRANGEMENT OF 4-AMINO-5-NITRO-6-GUANJDINO PY RIMIDJNE chloro-5-nitropyrimidine by the guanidine group proceeded normally under the same condi- tions to give a 78% yield of the desired-4amino-6-guanidin0-5-nitropyrimidine (XII), along with a very small quantity of the ether, 4-amino-6-ethoxy-5-nitro-pyrimidine (XIII). The chemistry of this guanidino pyrimidine (XII) has proved to be fairly complex. For example, ...
