Process for producing pyrido[1,2-a]pyrimidine derivative

Details Process for producing pyrido[1,2-a]pyrimidine derivative Process for producing pyrido[1,2-a]pyrimidine derivative

C - Chemistry, Metallurgy

07

D

260/242.01, 260/

C07D 401/12 (2006.01) C07D 471/04 (2006.01)

Patent

CA 2010336

3-Tetrazolylpyrido[1,2-a]pyrimidin-4-one derivatives useful as an antiallergy agent are produced by reacting a cyano derivative of pyrido[1,2-a]pyrimidin-4- one compound with (i) hydrazoic acid, followed by hydrolysis, or with (ii) a salt of hydrazoic acid, reacting the resulting product with an acid or a base, followed by hydrolysis.

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