1-substituted-3-acylpyrrole derivatives, process for their preparation and platelet aggregation inhibiting agents containing them
申请人:TEIJIN LIMITED
公开号:EP0002392A2
公开(公告)日:1979-06-13
The invention provides 1-substituted-3-acylpyrroles of the formula:-
wherein is an optionaliy substituted phenyl group, a cycloalkyl or cycloalkenyl group. branched alkyl group, or optionally substituted heterocyclic group, R, is hydrogen or an alkyl group and R2, R3 and R4, are such that the substituent linked to the N-atom in the 1-position contains an alcoholic hydroxyl proup. an ether group, a thioether group or a functional group derived from oxidation of these groups linked to the N-atorn through a chain of two carbon atoms.
The compounds of the invention, unlike known 3-acyl-1- substituted pyrrole derivatives, have high platelet aggregation inhibiting activities and low antiinflammatory activities.
They may be made by acylating a 1-substituted pyrrole in the 3-position by reaction with an anhydride or halide of a carboxylic acid of the formula COOH, in the presence of an acid catalyst, and if desired subjecting the products to oxidation, hydrolysis, amidation or acetal-forming reaction.
本发明提供了式中的 1-取代-3-酰基吡咯:- 1-取代-3-酰基吡咯
其中,R2、R3 和 R4 是任选取代的苯基、环烷基或环烯基、支链烷基或任选取代的杂环基团;R 是氢或烷基;R2、R3 和 R4 是这样的取代基:与 1 位 N 原子相连的取代基含有醇羟基、醚基、硫醚基或由这些基团通过两个碳原子链与 N 原子相连的氧化衍生的官能团。
与已知的 3-酰基-1-取代的吡咯衍生物不同,本发明的化合物具有较高的血小板聚集抑制活性和较低的抗炎活性。
本发明化合物的制备方法是:在酸催化剂存在下,通过与式 COOH 的羧酸的酸酐或卤化物反应,使 1-取代的吡咯在 3 位上酰化,并根据需要使产物进行氧化、水解、酰胺化或缩醛生成反应。