3 - 1h - tetrazol - 5 - - 4h - pirido 1.2 - to pirimidin - 4 - oni replaced useful in particular as therapeutic agents to inhibit allergic reactions and process for the production of said derivatives

摘要

A novel series of optionally substituted 3-(1H-tetrazol-5-yl)-4H-pyrido[1,2-a]pyrimidin-4-ones is provided for use as inhibitors of allergic reactions. The compounds exhibit antiallergy activity by both oral and parenteral routes of administration.