Abstract

A recyclable sulfated copper oxide catalyst in acetonitrile is effective for the synthesis of N-fused benzimidazolo/benzothiazolo pyrimidine derivatives by the reaction of 2-aminobenzimidazole/2-aminobenzothiazole, phenyl acetylene, and benzaldehydes. This method is a unified approach to assemble a wide variety of fused pyrmidines.

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