Abstract
A novel synthesis of dimethyl 4,5-dihydro-5-aryl-[1,2,4]triazolo[1,5-a]pyrimidine-6,7-dicarboxylates is reported. This methodology consists of the one-pot condensation of 3-amino-1H-1,2,4-triazole, dimethyl acetylenedicarboxylate, and aryl aldehydes using silica sodium carbonate as a solid base catalyst. The use of silica sodium carbonate as a heterogeneous reusable catalyst makes this procedure mild, convenient, and environmentally benign.
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