Chlorostyrenes in Iron-Catalyzed Biaryl Coupling Reactions
作者:Samet Gülak、Axel Jacobi von Wangelin
DOI:10.1002/anie.201106110
日期:2012.2.6
An effective protocol for iron‐catalyzed biaryl syntheses by couplingchlorostyrenes with aryl Grignard reagents requires only mild reaction conditions and tolerates various functional groups. The underlying activation of deactivated aryl chlorides proceeds through a rate‐determining coordination of the catalyst to the vinyl substituent and subsequent haptotropic migration along the conjugated π system
Redox-Neutral Generation of Iminyl Radicals by <i>N</i>-Heterocyclic Carbene Catalysis: Rapid Access to Phenanthridines from Vinyl Azides
作者:Lixia Liu、Qijing Zhang、Chengming Wang
DOI:10.1021/acs.orglett.2c02118
日期:2022.8.19
carbene-catalyzed oxidant-, metal- and light-free iminyl radical generation pathway stemming from the reaction of vinyl azide and α-bromo ester is uncovered. This newly developed methodology is successfully applied to the redox-neutral construction of a number of diversified phenanthridine derivatives with nice functional group compatibility. Insights from the mechanism study reveal that this NHC-catalyzed transformation
揭示了源自乙烯基叠氮化物和 α-溴酯反应的N-杂环卡宾催化的氧化剂、金属和无光亚胺基自由基生成途径。这种新开发的方法成功地应用于具有良好官能团相容性的多种菲啶衍生物的氧化还原中性构建。机理研究表明,这种 NHC 催化的转化可能通过烷基自由基加成引发的 HAS 过程进行,亚胺自由基作为活性中间体。
Process of enhanced chemical bonding by electron beam radiation
申请人:KIMBERLY-CLARK CORPORATION
公开号:EP0668390A2
公开(公告)日:1995-08-23
Permanent surface modification of polypropylene nonwoven fabrics is achieved through electron beam radiation induced chemical bonding. The electron beam energy levels suitable for such chemical bonding are between about 5 KeV to about 110 KeV at the surface of the fabric facing the electron beam radiation source. At these energy levels, chemical bonding, control of electron beam penetration and the formation of free radicals in the polypropylene nonwoven fabrics are achieved. Control of electron beam penetration produces free radical formation and chemical bonding at selective levels within the fabric as well as bonding of different chemicals asymmetrically to the same fabric with minimal, if any, loss of polymer fabric strength.
[EN] VOLTAGE-GATED SODIUM CHANNEL BLOCKERS<br/>[FR] BLOQUEURS DE CANAUX SODIQUES SENSIBLES AU POTENTIEL
申请人:GLAXO GROUP LTD
公开号:WO2011088201A1
公开(公告)日:2011-07-21
The present invention relates to voltage-gated sodium channel blocker intermediates, compounds and dimers, corresponding pharmaceutical compositions, compound preparation and treatment methods for respiratory or respiratory tract diseases.