Synthesis of phthalic acid derivatives <i>via</i> Pd-catalyzed alkoxycarbonylation of aromatic C–H bonds with alkyl chloroformates
作者:Gang Liao、Hao-Ming Chen、Bing-Feng Shi
DOI:10.1039/c8cc06663a
日期:——
A Pd(II)-catalyzed alkoxycarbonylation of aromatic C–H bonds with alkylchloroformates has been developed. A broad range of benzamides and alkylchloroformates are compatible with this protocol. The reaction is operationally simple and scalable. The direct group could be readily removed to access substituted phthalic acid esters (PAEs), 1,2-dibenzyl alcohols and phthalamides. Besides alkoxycarbonylation
Nickel-Catalyzed Direct Alkylation of C–H Bonds in Benzamides and Acrylamides with Functionalized Alkyl Halides via Bidentate-Chelation Assistance
作者:Yoshinori Aihara、Naoto Chatani
DOI:10.1021/ja401344e
日期:2013.4.10
The alkylation of the ortho C-H bonds in benzamides and acrylamides containing an 8-aminoquinoline moiety as a bidentate directing group with unactivated alkylhalides using nickel complexes as catalysts is described. The reaction shows high functional group compatibility. In reactions of meta-substituted aromatic amides, the reaction proceeds in a highly selective manner at the less hindered C-H bond
Aqueous Benzylic C–H Trifluoromethylation for Late-Stage Functionalization
作者:Shuo Guo、Deyaa I. AbuSalim、Silas P. Cook
DOI:10.1021/jacs.8b08547
日期:2018.10.3
The installation of trifluoromethylgroups has become an essential step across a number of industries such as agrochemicals, drug discovery, and materials. Consequently, the rapid introduction of this critical functional group in a predictable fashion would benefit current practitioners in those fields. This communication describes a mild trifluoromethylation of benzylic C-H bonds with high selectivity
Palladium-Catalyzed Direct <i>ortho</i>-Alkynylation of Aromatic Carboxylic Acid Derivatives
作者:Yusuke Ano、Mamoru Tobisu、Naoto Chatani
DOI:10.1021/ol203100u
日期:2012.1.6
The palladium-catalyzed directalkynylation of C–H bonds in aromatic carboxylicacid derivatives is described. The use of 8-aminoquinoline as a directing group facilitates the alkynylation of an electronically diverse range of C(sp2)–H bonds.
Cobalt-Catalyzed Carbonylative Synthesis of Phthalimides from <i>N</i>-(Pyridin-2-ylmethyl)benzamides with TFBen as the CO Source
作者:Lu-Yang Fu、Jun Ying、Xiao-Feng Wu
DOI:10.1021/acs.joc.9b01890
日期:2019.10.4
A cobalt-catalyzed direct carbonylative synthesis of phthalimide motifs from N-(pyridin-2-ylmethyl)benzamides has been developed. Various phthalimide derivatives were obtained in moderate to excellent yields (up to 98%) by using 2-picolylamine as an efficient directing group and benzene-1,3,5-triyl triformate (TFBen) as a convenient CO surrogate.