A novel series of 1-oxo-1H-6-substitutedpyrimido[1,2-a]quinoline-2-carboxylic acids of the formula ##STR1## wherein each of R.sub.1, R.sub.2 and R.sub.3 is hydrogen, alkyl having from 1 to 5 carbon atoms, alkoxy having from 1 to 5 carbon atoms, carboalkoxy having from 1 to 5 carbon atoms in the alkoxy group, fluoro, chloro, bromo, methylthio or methylsulfinyl; with the proviso that no more than two of R.sub.1, R.sub.2 and R.sub.3 are bulky groups; i.e., branched-chain alkyl or branched-chain alkoxy, and when two of said R.sub.1, R.sub.2 and R.sub.3 are bulky groups they are located on non-adjacent positions; R.sub.4 is selected from the group consisting of chloro and bromo and --OR.sub.4 ' wherein OR.sub.4 ' is selected from the group consisting of alkoxy having from 1 to 5 carbon atoms, alkenyloxy of 3 to 4 carbon atoms and alkynyloxy of 3 to 4 carbon atoms; R.sub.5 is hydroxy, alkoxy having from 1 to 5 carbon atoms and hydroxy substituted alkoxy having from 2 to 5 carbon atoms; R.sub.2 and R.sub.3 when taken together are 1,3-butadienyl or alkylenedioxy of one to two carbon atoms; and the pharmaceutically-acceptable cationic salts of those compounds wherein R.sub.5 is hydroxy; compositions thereof; and their use as antiallergy agents.
一种新的1-
氧代-1H-6-取代
嘧啶并[1,2-a]
喹啉-2-
羧酸系列化合物,其
化学式为##
STR1##其中R.sub.1、R.sub.2和R.sub.3中的每一个均为
氢、具有1至5个
碳原子的烷基、具有1至5个
碳原子的烷
氧基、烷
氧基中烷
氧基团中有1至5个
碳原子的羧基烷
氧基、
氟、
氯、
溴、甲
硫基或
甲基磺
氧基;但要注意,R.sub.1、R.sub.2和R.sub.3中最多只有两个是大块基团,即支链烷基或支链烷
氧基;当R.sub.1、R.sub.2和R.sub.3中有两个大块基团时,它们位于非相邻位置;R.sub.4选择自
氯和
溴以及--OR.sub.4',其中OR.sub.4'选择自具有1至5个
碳原子的烷
氧基、具有3至4个
碳原子的
烯基
氧基和具有3至4个
碳原子的炔基
氧基;R.sub.5为羟基、具有1至5个
碳原子的烷
氧基和具有2至5个
碳原子的羟基取代烷
氧基;当R.sub.2和R.sub.3同时取代时,它们为
1,3-丁二烯基或具有1至2个
碳原子的烷基二
氧基;以及其中R.sub.5为羟基的药用阳离子盐化合物;该化合物的组合物;以及它们作为抗过敏剂的用途。