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
Ruthenium- and rhodium-catalyzed cross-coupling reaction of acrylamides with alkenes: efficient access to (Z,E)-dienamides
作者:Jian Zhang、Teck-Peng Loh
DOI:10.1039/c2cc36137j
日期:——
Ruthenium- and rhodium-catalyzed direct oxidative cross-coupling reactions of acrylamides with alkenes were developed. These methods provide an efficient route for the synthesis of (Z,E)-dienamides in excellent yields with good stereoselectivity. The catalytic systems allowed oxidative olefination of a wide range of alkenes bearing different functional groups, such as CO(2)R, COMe, SO(2)Ph, aryl, CONHBn,
[EN] WATER-BASED UV INKJET INK<br/>[FR] ENCRE À BASE D'EAU DURCISSABLE PAR UV POUR L'IMPRESSION PAR JET D'ENCRE
申请人:SUN CHEMICAL CORP
公开号:WO2015183719A1
公开(公告)日:2015-12-03
The invention describes the use of a water-based UV curable inkjet printing ink wherein the ink is basic due to the presence of a tertiary amine, allowing the complete dissolution of an acid functional photoinitiator of Formula I or Formula IA (wherein R1, R2, R3, n, q, and y are as defined herein). This combination of photoinitiator and tertiary amine allows the rapid low dosage UV curing of a water-based UV formulation using a UV LED light source.
Directing-Group-Assisted Copper-Catalyzed Olefinic Trifluoromethylation of Electron-Deficient Alkenes
作者:Chao Feng、Teck-Peng Loh
DOI:10.1002/anie.201307245
日期:2013.11.18
Assistance provided: The directing group in the title reaction not only activates the substrates but also allows the stereospecific formation of cis‐trifluoromethylated products. The reaction is operationally simple and tolerates a wide variety of functional groups, thus providing an efficient method for the stereoselective synthesis of β‐CF3‐functionalized acrylamide derivatives.
Bifunctional ligands for Pd-catalyzed selective alkoxycarbonylation of alkynes
作者:Huimin Qi、Zijun Huang、Menglan Wang、Peiju Yang、Chen-Xia Du、Shu-Wei Chen、Yuehui Li
DOI:10.1016/j.jcat.2018.04.007
日期:2018.7
represent straightforward and atom-economic synthesis of α,β-unsaturatedcarbonylcompounds. One of the issues associated with the currently known catalytic systems is insufficient efficiency. In this context, Pd/ligand-catalyzed regioselective and efficient alkoxycarbonylation of terminal alkynes is desirable for the synthesis of α,β-unsaturated esters. Herein, we present the use of a newly designed