N-acyloxylated cycloalkyl compounds, composition containing the same and methods of use therefor
申请人:Daiichi Radioisotope Laboratories, Ltd.
公开号:US06713492B1
公开(公告)日:2004-03-30
Drugs or reagents containing as the active ingredient N-acyloxylated cycloalkyl compounds represented by general formula (I):
wherein A is optionally substituted C4 or C5 cycloalkyl which may have one double bond in the ring; and R is C1-C3 alkyl or phenyl). The above compounds are hydroxyamine derivatives functioning as spin trapping agents and can rapidly react with free radicals or active oxygen in an objective organ in spite of their being excellent in stability during the preparation or administration thereof.
Several acyl-protected hydroxylamines were synthesized as new spin reagents for ESR measurements of intracellular oxidative stress. These compounds were stable non-radical compounds, but were easily deprotected with esterase to yield hydroxylamines, which were oxidized by oxidants to yield ESR- detectable nitroxide radical. Using an acyl-protected hydroxylamine, a highly sensitive ESR determination procedure was successfully conducted to analyze oxidative stress in human leukocytes.
DRUGS AND REAGENTS CONTAINING N-ACYLOXYLATED CYCLOALKYL COMPOUNDS AS THE ACTIVE INGREDIENT
申请人:DAIICHI RADIOISOTOPE LABORATORIES, LTD.
公开号:EP1132085A1
公开(公告)日:2001-09-12
Drugs or reagents containing as the active ingredient N-acyloxylated cycloalkyl compounds represented by general formula (I):
(wherein A is optionally substituted C4 or C5 cycloalkyl which may have one double bond in the ring; and R is C1 - C3 alkyl or phenyl). The above compounds are hydroxyamine derivatives functioning as spin trapping agents and can rapidly react with free radicals or active oxygen in an objective organ in spite of their being excellent in stability during the preparation or administration thereof.