申请人:Sterling Drug Inc.
公开号:US04105766A1
公开(公告)日:1978-08-08
4,5-Dihydro-5-oxopyrazolo[1,5-a]quinazoline-3-carboxylic acids and esters and alkali metal salts thereof, useful as anti-inflammatory, anti-allergic and anti-parasitic agents, are prepared by reacting a 4- or 5-R.sub.3 -2-carboxyphenylhydrazine with a lower-alkyl ethoxymethylenecyanoacetate and, if desired, saponifying the ester group and if desired, N-alkylating the product by reaction with an R.sub.2 -halide in the presence of an acid-acceptor.
4,5-二氢-5-氧代吡唑并[1,5-a]喹唑啉-3-羧酸及其酯和碱金属盐,可用作抗炎、抗过敏和抗寄生虫剂。其制备方法为将4-或5-R.sub.3-2-羧基苯肼与较低烷基乙氧甲基丙烯腈酸酯反应,如有需要,则皂化酯基,如有需要,则在酸受体的存在下通过与R.sub.2-卤代物反应对产物进行N-烷基化。