A Novel One-Pot Method for Highly Regioselective Synthesis of Triazolopyrimidinedicarboxylates Using Silica Sodium Carbonate

摘要

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.