Provided herein are compositions and related methods useful for free radical scavenging, with particular selectivity for mitochondria. The compounds comprise a nitroxide-containing group attached to a mitochondria-targeting group. The compounds can be cross-linked into dimers without loss of activity. Also provided herein are methods, for preventing, mitigating and treating damage caused by radiation. The method comprises delivering a compound, as described herein, to a patient in an amount and dosage regimen effective to prevent, mitigate or treat damage caused by radiation.
INTRAESOPHAGEAL ADMINISTRATION OF TARGETED NITROXIDE AGENTS FOR PROTECTION AGAINST IONIZING IRRADIATION-INDUCED ESOPHAGITIS
申请人:University of Pittsburgh - Of the Commonwealth System of Higher Education
公开号:US20190210969A1
公开(公告)日:2019-07-11
Provided herein are compositions and related methods useful for prevention or mitigation of ionizing radiation-induced esophagitis. The compositions comprise compounds comprising a nitroxide-containing group attached to a mitochondria-targeting group. The compounds can be cross-linked into dimers without loss of activity. The method comprises delivering a compound, as described herein, to a patient in an amount and dosage regimen effective to prevent or mitigate esophageal damage caused by radiation.
A novel protecting group methodology for syntheses using nitroxides
作者:Benjamin A. Chalmers、Jason C. Morris、Kathryn E. Fairfull-Smith、Richard S. Grainger、Steven E. Bottle
DOI:10.1039/c3cc46146g
日期:——
The methoxyamine group represents an ideal protecting group for the nitroxide moiety. It can be easily and selectively introduced in high yield (typically >90%) to a range of functionalised nitroxidesusing FeSO4.7H2O and H2O2 in DMSO. Its removal is readily achieved under mild conditions in high yield (70-90%) using mCPBA in a Cope-type elimination process.
The synthesis of water soluble isoindoline nitroxides and a pronitroxide hydroxylamine hydrochloride UV–VIS probe for free radicals
作者:Damien A. Reid、Steven E. Bottle
DOI:10.1039/a805228j
日期:——
The novel water soluble nitroxides 5-trimethylammonio-1,1,3,3-tetramethylisoindolin-2-yloxyl iodide 8 and 5-carboxy-1,1,3,3-tetramethylisoindolin-2-yloxyl 10 are prepared by nitration of the parent nitroxide 2 and bromination of its amine precursor 1; the stable (t1/2 > 580 h in MeOH; ca 72 h in physiological saline) pronitroxide 2-hydroxy-1,1,3,3-tetramethylisoindoline hydrochloride 6 was synthesised by treatment of 2 with HCl gas in dry EtOH and reacts with radicals to form 2; the transformation can be followed by UVâVIS spectroscopy.