Suzuki–Miyaura coupling of nonbenzylic α‐(acylamino)alkylboron compounds with aryl halides is established. A Pd/PCy2Ph catalyst promotes the reaction efficiently at 145 °C. The reaction of enantioenriched α‐(acylamino)alkylboron compounds affords chiral 1‐arylalkylamides in high enantiospecificity and inversion of configuration.
A concise, highly stereoselective synthesis of 2,4- and 2,5-disubstituted thiazole amino acids was developed. These are important building blocks for various biologically active thiazole-containing natural peptides and their regioisomeric analogues. The fundamental reactions are diastereoselective addition of (4- or 5-bromothiazol-2-yl)lithium to N-tert-butanesulfinyl imine with subsequent Pd-catalyzed
Dramatic lithium chloride effect on the reaction stereocontrol in Zn-mediated asymmetric cinnamylation: highly practical synthesis of β-aryl homoallylic amines
作者:Min Liu、An Shen、Xing-Wen Sun、Fei Deng、Ming-Hua Xu、Guo-Qiang Lin
DOI:10.1039/c0cc03230a
日期:——
An extremely mild and practical approach for the preparation of enantiomerically enriched beta-aryl substituted homoallylic amines bearing two adjacent stereogeniccenters was realized by room temperature zinc-mediated highlystereoselective cinnamylation of N-sulfinyl imines.
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.