Novel antioxidants, preparation processes and their uses
申请人:——
公开号:US20040158092A1
公开(公告)日:2004-08-12
The invention concerns a process for preparing compounds of general formula (I)
1
wherein R and R′ represent an alkyl radical or an aryl group; and R″ is hydrogen or a CO—R
1
group wherein R
1
is an alkyl radical or an aryl group; and wherein these compounds are or not in the thiazolidine form; by protecting the N-acyl-L-cysteine to form an intermediate compound; and then by coupling said intermediate compound with S-acylcysteamine hydrochloride or with thiazolidine.
Mucolytic benzene and thiophene-carbothioic acid 2-aminoalkyl ester acid
申请人:A. H. Robins Company, Inc.
公开号:US04296092A1
公开(公告)日:1981-10-20
Benzene and 2-thiophene carbothioic and 2-aminoalkyl ester acid salts having the formula: ##STR1## wherein R is 2-thiophene, benzene or substituted benzene; n is 2 and 3 and X.sup.- is a chlorine or bromine radical and methods of using the compounds and compositions are disclosed.
Antioxidants, preparation processes and their uses
申请人:Oiry Joel
公开号:US06979747B2
公开(公告)日:2005-12-27
The invention concerns a process for preparing compounds of general formula (I)
wherein R and R′ represent an alkyl radical or an aryl group; and R″ is hydrogen or a CO—R
1
group wherein R
1
is an alkyl radical or an aryl group; and wherein these compounds are or not in the thiazolidine form; by protecting the N-acyl-L-cysteine to form an intermediate compound; and then by coupling said intermediate compound with S-acylcysteamine hydrochloride or with thiazolidine.
申请人:Centre National de la Recherche Scientifique (CNRS)
公开号:US06989372B1
公开(公告)日:2006-01-24
The invention concerns compounds of general formula (I) (wherein R and R′ represent an alkyl radical or an aryl group and R″ is hydrogen or a CO—R1 group wherein R1 is an alkyl radical or an aryl group; and the dimers formed by the disulphide bond from one and/or the other of the two sulphur atoms of the compounds of general formula (I); and the corresponding thiazolidin forms), the methods for preparing them and uses thereof. More particularly, it concerns the use of said compounds as antioxidant agents, in particular for preparing medicines designed to increase the intracellular and/or extracellular level of glutathione (GSH).
Synthesis of new N-isobutyryl-l-cysteine/MEA conjugates: Evaluation of their free radical-scavenging activities and anti-HIV properties in human macrophages
Four novel N-isobutyryl-L-cysteine/2-mercaptoethylamine (MEA, cysteamine) conjugates have been designed and synthesized. The antioxidant activities of these new series were evaluated by three different free radical scavenging methods (DPPH test, ABTS test, and deoxyribose assay) and their metal binding capacity was evaluated by the ethidium bromide fluorescence binding assay. These results were compared with those obtained with their pro-GSH acetyl analogues recently developed in our laboratory. We observed that most of these compounds exhibit free radical-scavenging activities similar to those of Trolox, but always superior than NAC. While none of these new derivatives had pro-GSH activities, they displayed anti-HIV properties in human monocyte-derived macrophages infected in vitro. The present study demonstrates that these new N-isobutyryl derivatives, which are expected to have a greater bioavailability than their acetyl analogues, may have useful applications in HIV infection in respect to their antioxidant and anti-HIV activities. (C) 2008 Elsevier Inc. All rights reserved.