An Efficient and Convenient Synthesis of 4,6-Dichloro-2-methyl-5-nitropyrimidine

摘要

A convenient synthesis of 4, 6-dihydro-2-methyl-pyrimidine can be obtained by cyclization reaction of acetamidine hydrochloride and diethyl malonate in the presence of sodium mefhoxide for a 91.2 % yield. 4, 6-Dihydro-2-methyl-5-nitropyrimidine can be achieved by nitration under the mixed acids of nitric acid, trichloroacetic acid and acetic acid in an 88.3 % yield and then the chlorination using phosphorus oxytrichloride can afford 4, 6-dichloro-2-methyl-5-nitropyrimidine with an 82.6 % yield.