Substituted Pyrrol-1-ylacetic Acids That Combine Aldose Reductase Enzyme Inhibitory Activity and Ability To Prevent the Nonenzymatic Irreversible Modification of Proteins from Monosaccharides
摘要:
Starting from the known inhibitory activity of (3-benzoylpyrrol-1-yl)acetic acid (1) and (2-benzoylpyrrol-1-yl)acetic acid (II), a series of 3-aroyl and 2,4-bis-aroyl derivatives (54-75) were synthesized and tested for inhibition of aldose reductase, an enzyme involved in the appearance of diabetic complications. It was found that a number of the tested compounds exhibited considerable activity in the micromolar range. Important structural features for the potent compounds is the presence of substituents with relatively low Hammett sigma values and/ or moieties which increase their overall aromatic area. The most active derivative was the [2,4-bis(4-methoxybenzoyl)pyrrol-1-yl] acetic acid (75), with potency favorably compared to known ARIs such as tolrestat, epalrestat, zopolrestat, and fidarestat. Four selected derivatives were also evaluated for their ability to interfere with the oxidative modification of serum albumin in an in vitro experimental glycation model of diabetes mellitus. All of them showed considerable activity, comparable to the known inhibitor trolox. Our results, taken together, indicate that compound 75 combines favorably two biological activities directly connected to a number of pathological conditions related to the chronic diabetes mellitus.
established as a bioisostere of aceticacid in a group of aroyl-substituted pyrrolyl derivatives. In the present work, optimization of this new class of ARIs was achieved by the addition of a trifluoroacetyl group on the pyrrole ring. Eight novel compounds were synthesized and tested for their inhibitoryactivity towards ALR2 and selectivity against aldehyde reductase (ALR1). All compounds proved potent
Therapeutic intervention with aldose reductase inhibitors appears to be promising for major pathological conditions (i.e., long-term diabetic complications and inflammatory pathologies). So far, however, clinical candidates have failed due to adverse side-effects (spiroimides) or poor bioavailability (carboxylic acids). In this work, we succeeded in the bioisosteric replacement of an acetic acid moiety with that of 1-hydroxypyrazole. This new scaffold appears to have a superior physicochemical profile, while attaining inhibitory activity in the submicromolar range. (C) 2013 Elsevier Ltd. All rights reserved.
Substituted Pyrrol-1-ylacetic Acids That Combine Aldose Reductase Enzyme Inhibitory Activity and Ability To Prevent the Nonenzymatic Irreversible Modification of Proteins from Monosaccharides
作者:Ioannis Nicolaou、Vassilis J. Demopoulos
DOI:10.1021/jm0209477
日期:2003.1.1
Starting from the known inhibitory activity of (3-benzoylpyrrol-1-yl)acetic acid (1) and (2-benzoylpyrrol-1-yl)acetic acid (II), a series of 3-aroyl and 2,4-bis-aroyl derivatives (54-75) were synthesized and tested for inhibition of aldose reductase, an enzyme involved in the appearance of diabetic complications. It was found that a number of the tested compounds exhibited considerable activity in the micromolar range. Important structural features for the potent compounds is the presence of substituents with relatively low Hammett sigma values and/ or moieties which increase their overall aromatic area. The most active derivative was the [2,4-bis(4-methoxybenzoyl)pyrrol-1-yl] acetic acid (75), with potency favorably compared to known ARIs such as tolrestat, epalrestat, zopolrestat, and fidarestat. Four selected derivatives were also evaluated for their ability to interfere with the oxidative modification of serum albumin in an in vitro experimental glycation model of diabetes mellitus. All of them showed considerable activity, comparable to the known inhibitor trolox. Our results, taken together, indicate that compound 75 combines favorably two biological activities directly connected to a number of pathological conditions related to the chronic diabetes mellitus.
A study of the friedel-crafts acylation of 1-benzenesulfonyl-1<i>H</i>-pyrrole in the preparation of 3-aroylpyrroles
作者:Ioannis Nicolaou、Vassilis J. Demopoulos
DOI:10.1002/jhet.5570350619
日期:1998.11
In this work, we studied the aluminum chloride catalyzed reaction of 1-benzenesulfonyl-1H-pyrrole with a series of eleven aroyl chlorides. The products formed were not isolated, but hydrolyzed to the target 3-aroylpyrroles in overall yields, usually, higher than 50%. However, in the cases with the π electron rich 1-phenyl-1H-pyrrole-3-carbonyl chloride and 1-methyl-1H-indole-3-carbonyl chloride significant