申请人:WAKO PURE CHEMICAL INDUSTRIES LTD
公开号:EP0385634A2
公开(公告)日:1990-09-05
3-Tetrazolylpyrido[1,2-a]pyrimidin-4-ones of formula
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.
3-
四唑基
吡啶并[1,2-a]
嘧啶-4-酮的式
吡啶并[1,2-a]
嘧啶-4-酮化合物的
氰基衍
生物与(i)
苯甲酸反应,然后
水解,或与(ii)
苯甲酸盐反应,生成物与酸或碱反应,然后
水解,即可制得可用作抗过敏剂的 3-
四唑基
吡啶并[1,2-a]
嘧啶-4-酮。