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A new and efficient procedure has been designed for the preparation of 6-alkylamino-2,4-dialkyl(aryl)thiopyrimidines. The first alkylthio group was introduced into the pyrimidine ring by S-alkylation. The introduction of the second one was successfully achieved using the diazotization–alkylthionation method to afford 2,4-dialkyl(aryl)thio-6-chloropyrimidines. Subsequent nucleophilic displacement by...
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