hydroformylation and hydroaminomethylation of α-substituted acrylamides is described using 1,3-phosphite-phosphoramidite ligands based on a sugar backbone. A broad scope of chiral aldehydes and amines were afforded in high yields and excellent enantioselectivities (up to 99%). Furthermore, the synthetic potential of this method is demonstrated by the single-step synthesis of the brain imaging molecule RWAY.
作者:Qi-Liang Yang、Yi-Kang Xing、Xiang-Yang Wang、Hong-Xing Ma、Xin-Jun Weng、Xiang Yang、Hai-Ming Guo、Tian-Sheng Mei
DOI:10.1021/jacs.9b11915
日期:2019.12.4
Synergistic use of electrochemistry and organometallic catalysis has emerged as a powerful tool for site-selective C-H functionalization, yet this type of transformation has thus far mainly been limited to arene C-H functionaliza-tion. Herein, we report the development of electrochemi-cal vinylic C-H functionalization of acrylic acids with al-kynes. In this reaction an iridium catalyst enables C-H/O-H
[EN] HYDROXAMATE SULFONAMIDES AS CD23 SHEDDING INHIBITORS<br/>[FR] SULFONAMIDES D'HYDROXAMATE SERVANT D'INHIBITEURS D'ELIMINATION DU VIRUS CD23
申请人:CELLTECH R&D LTD
公开号:WO2004113312A1
公开(公告)日:2004-12-29
A class of piperazine and related heterocyclic derivatives, substituted at the 4-position by a substituted aryl or heteroaryl moiety, and at the 1-position by an ethylsulfonyl group which in turn is substituted at the 2-position by a hydroxamic acid moiety and also by a range of alternative substituents, being potent inhibitors of CD23 shedding, are useful in the treatment and/or prevention of allergic, inflammatory and neoplastic diseases.
[EN] HYDROXAMATE SULFONAMIDES AS CD23 SHEDDING INHIBITORS<br/>[FR] HYDROXAMATE SULFONAMIDES UTILISES EN TANT QU'INHIBITEURS DE L'ELIMINATION DE CD23
申请人:CELLTECH R&D LTD
公开号:WO2004113298A1
公开(公告)日:2004-12-29
A class of piperidine and related heterocyclic derivatives, C-substituted by a substituted aryl or heteroaryl moiety, and N-substituted by an ethylsulfonyl group which in turn is substituted at the 2-position by a hydroxamic acid moiety and also by a range of alternative substituents, being potent inhibitors of CD23 shedding, are useful in the treatment and/or prevention of allergic, inflammatory and neoplastic diseases.
efficient and convenient copper-mediated method has been developed to achieve direct cascadeC–H/N–H annulation to synthesize 2-quinolinones from electron-deficient acrylamides and arynes. This method highlights an emerging but simple strategy to transform inert C–H bonds into versatile functional groups in organic synthesis to provide a new method of synthesizing 2-quinolinones efficiently. Mechanistic