描述了一种新的铑催化的苯并[ h ]喹啉-10-羧酸乙酯与有机硼化合物的脱羰偶联反应,该反应通过螯合辅助的sp 2 C-COOEt键活化而发生。在该系统中,CuCl发挥了非常重要的作用,并且五元罗丹环也作为关键中间体参与其中。在反应中各种官能团是相容的,并且以良好至优异的产率获得了所需的产物。还已经使用Rh(I)模型催化剂对该反应机理进行了DFT计算。
AbstractA novel palladium‐catalyzed direct alkoxycarbonylation of 2‐arylpyridines, 2‐arylquinolines, benzo[h]quinolines, 2‐phenylpyrimidines, N‐pyrimidine pyrroles and N‐pyrimidine indoles via aromatic CH bond activation and selective CC cleavage of α‐keto esters has been developed. The method has the advantages of wide functional group tolerance, high selectivity, broad range of substrates and good yields.magnified image
Palladium-Catalyzed Oxidative Ethoxycarbonylation of Aromatic C−H Bond with Diethyl Azodicarboxylate
作者:Wing-Yiu Yu、Wing Nga Sit、Kin-Man Lai、Zhongyuan Zhou、Albert S. C. Chan
DOI:10.1021/ja710555g
日期:2008.3.1
(DEAD) together with Oxone or K2S2O8. Substrates such as 2-arylpyridines, pyrrolidinone, acetylindoline, quinoline, and oximes were ethoxycarbonylated with excellent chemo- and regioselectivities. The catalytic reaction is probably initiated by chelation-assisted cyclopalladation of the ortho-C−H bond. Preliminary studies suggested that reactive ethoxyacyl radicals generated from thermal decomposition
New Reactivity of Oxaziridine: Pd(II)-Catalyzed Aromatic C–H Ethoxycarbonylation via C–C Bond Cleavage
作者:Xingao Peng、Yingguang Zhu、Thomas A. Ramirez、Baoguo Zhao、Yian Shi
DOI:10.1021/ol2021252
日期:2011.10.7
A novel Pd(II)-catalyzed aromatic C-H ethoxycarbonylation with oxaziridine involving C-C bond cleavage is described. Various aromatic 2-phenylpyridines and related compounds as well as aryl ureas can be effectively ethoxycarbonylated. A catalytic cycle involving Pd(II) and Pd(IV) is proposed.
Rhodium-Catalyzed Cross-Coupling Reactions of Carboxylate and Organoboron Compounds via Chelation-Assisted C–C Bond Activation
作者:Jingjing Wang、Bowen Liu、Haitao Zhao、Jianhui Wang
DOI:10.1021/om300994j
日期:2012.12.24
A new rhodium-catalyzed decarbonylated coupling reaction of ethyl benzo[h]quinoline-10-carboxylate and organoboroncompounds that occurs through chelation-assisted sp2 C–COOEt bond activation was described. In this system CuCl played a very important role, and a five-membered rhodacycle was also involved as a key intermediate. Various functionalities were compatible in the reaction, and the desired
描述了一种新的铑催化的苯并[ h ]喹啉-10-羧酸乙酯与有机硼化合物的脱羰偶联反应,该反应通过螯合辅助的sp 2 C-COOEt键活化而发生。在该系统中,CuCl发挥了非常重要的作用,并且五元罗丹环也作为关键中间体参与其中。在反应中各种官能团是相容的,并且以良好至优异的产率获得了所需的产物。还已经使用Rh(I)模型催化剂对该反应机理进行了DFT计算。
Palladium-Catalyzed Direct Alkoxycarbonylation of Aromatic CH Bonds<i>via</i>Selective CC Cleavage of α-Keto Esters
作者:Wei Zhou、Pinhua Li、Yicheng Zhang、Lei Wang
DOI:10.1002/adsc.201300436
日期:2013.8.12
AbstractA novel palladium‐catalyzed direct alkoxycarbonylation of 2‐arylpyridines, 2‐arylquinolines, benzo[h]quinolines, 2‐phenylpyrimidines, N‐pyrimidine pyrroles and N‐pyrimidine indoles via aromatic CH bond activation and selective CC cleavage of α‐keto esters has been developed. The method has the advantages of wide functional group tolerance, high selectivity, broad range of substrates and good yields.magnified image