Rh(<scp>iii</scp>)-Catalyzed allylic C–H amidation of unactivated alkenes with <i>in situ</i> generated iminoiodinanes
作者:Pinki Sihag、Masilamani Jeganmohan
DOI:10.1039/d1cc02283k
日期:——
Rh(iii)-catalyzed direct allylic C–H amidation of substituted alkenes by in situ generated iminoiodinanes in a highly atom- and step-economical manner is demonstrated.
Regioselective and Redox‐Neutral Cp*Ir
<sup>III</sup>
‐Catalyzed Allylic C−H Alkynylation
作者:Shobhan Mondal、Tobias Pinkert、Constantin G. Daniliuc、Frank Glorius
DOI:10.1002/anie.202015249
日期:2021.3.8
bromoalkynes via intermolecular allylicC−Halkynylation. The developed mild reaction conditions tolerate a broad range of common functional groups, even enabling selective alkynylation of allylicC−H bonds in the presence of other prominent directing groups. Mechanistic experiments including the isolation of a catalytically active IrIII‐allyl species support an intermolecular allylicC−H activation followed by
在本文中,我们报道了Cp * Ir III催化的高度区域选择性和氧化还原中性方案,用于通过分子间烯丙基CH-H烷基化反应从未活化的烯烃和溴炔烃构建1,4-烯炔。发达的温和反应条件可以耐受广泛的通用官能团,甚至可以在存在其他重要的导向基团的情况下选择性烯丙基CH键进行炔基化反应。包括分离具有催化活性的Ir III-烯丙基物种的机械实验支持分子间烯丙基CH活化,然后进行亲电炔基化。
Intermolecular, Branch‐Selective, and Redox‐Neutral Cp*Ir
<sup>III</sup>
‐Catalyzed Allylic C−H Amidation
Herein, we report the redox‐neutral, intermolecular, and highly branch‐selectiveamidation of allylicC−H bonds enabled by Cp*IrIII catalysis. A variety of readily available carboxylic acids were converted into the corresponding dioxazolones and efficiently coupled with terminal and internal olefins in high yields and selectivities. Mechanistic investigations support the formation of a nucleophilic
在本文中,我们报道了由Cp * Ir III催化实现的烯丙基CH键的氧化还原中性,分子间和高度分支选择性酰胺化。将各种容易获得的羧酸转化为相应的二恶唑酮,并以高收率和选择性将其与末端和内部烯烃有效偶联。机理研究支持亲核性Ir III-烯丙基中间体的形成,而不是将Ir-nitrenoid物种直接插入烯丙基CH键中。
Chemoselective CaO-Mediated Acylation of Alcohols and Amines in 2-Methyltetrahydrofuran
作者:Vittorio Pace、Pilar Hoyos、Andrés R. Alcántara、Wolfgang Holzer
DOI:10.1002/cssc.201200922
日期:2013.5
Calcium oxide is proposed as an innocuous acid scavenger for the chemoselective synthesis of amide‐ and ester‐type compounds. Although these molecules have wide spread applications in organic and pharmaceutical chemistry, and a large number of routes have been designed for their synthesis, the development of more efficient and environmentally friendly acylation strategies remains an ongoing challenge
[EN] PHOTOALIGNING MATERIALS<br/>[FR] MATÉRIAUX DE PHOTOALIGNEMENT
申请人:ROLIC AG
公开号:WO2013050121A1
公开(公告)日:2013-04-11
The present invention relates to polymer, homo- or copolymer or oligomer for the photoalignment of liquid crystals, especially for the planar orientation of liquid crystals, comprising a main chain and a side chain, wherein the side chain and/or main chain comprises a polar group, compositions thereof, and its use for optical and electro optical devices, especially liquid crystal devices (LCDs).