Pyrido [2, 3‐d]pyrimidines and Pyrimido[5′, 4′:5, 6]pyrido[2, 3‐d]pyrimidines as New Antiviral Agents: Synthesis and Biological Activity

A series of 7‐amino‐ and 7‐oxo‐5‐aryl‐6‐cyanopyrido[2, 3‐d]pyrimidines, 4 and 11, respectively, and pyrimido [5′, 4′:5, 6]pyrido[2, 3‐d]pyrimidine derivatives 6 and 7 was synthesized and investigated as antiviral agents. Different synthetic strategies for the preparation of the target compounds were...

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