Novel 5-substituted-1,2-dihydro-3H-pyrrolo[1,2-a]pyrrole-1-carboxylic acid compounds represented by the formulas ##STR1## and the pharmaceutically acceptable, non-toxic esters and salts thereof, wherein X is oxygen or sulphur, R is hydrogen or a lower alkyl group having from 1 to 4 carbon atoms and R.sup.1 is hydrogen, methyl, chloro or bromo, the R.sup.1 substitution being at the 3, 4 or 5 positions of the furan or thiophene ring in the compounds of Formula (A), and process for the production thereof; 5-(2-thenoyl)-1,2-dihydro-3H-pyrrolo-[1,2-a]pyrrole-1-carboxylic acid and 5-(3-furoyl)-1,2-dihydro-3H-pyrrolo[1,2-a]pyrrole-1-carboxylic acid are representative of the class. These compounds, as the racemic mixture or the (1)-isomer, are useful as anti-inflammatory, analgesic and antipyretic agents and as smooth muscle relaxants.
化合物为Novel 5-取代-1,2-二氢-
3H-吡咯并[1,2-a]
吡咯-1-
羧酸,其
化学式表示为##STR1##以及其药学上可接受、无毒的酯和盐,其中X为氧或
硫,R为氢或具有1至4个碳原子的低碳基,R.sup.1为氢、甲基、
氯或
溴,R.sup.1取代物位于化合物A的
呋喃或
噻吩环的3、4或5位置,以及其生产方法;5-(2-
硫代苯甲酰基)-1,2-二氢-
3H-吡咯并[1,2-a]
吡咯-1-
羧酸和5-(3-
呋喃甲酰基)-1,2-二氢-
3H-吡咯并[1,2-a]
吡咯-1-
羧酸是该类化合物的代表。这些化合物,作为混合物或(1)-异构体,可用作抗炎、镇痛和退热剂以及平滑肌松弛剂。