C(sp2)–H bond oxidation of oximes or azobenzenes with diverse carboxylic acids has been developed. In contrast to the previous catalytic systems, this protocol features mild conditions (close to room temperature for most cases) and a broad substrate scope (up to 64 examples), thus constituting a versatile method to directly prepare diverse O-aryl esters. Moreover, the superiority of the nitrate additive
Palladium-catalyzed decarboxylative acylation of O-methyl ketoximes with α-keto acids
作者:Minyoung Kim、Jihye Park、Satyasheel Sharma、Aejin Kim、Eonjeong Park、Jong Hwan Kwak、Young Hoon Jung、In Su Kim
DOI:10.1039/c2cc38433g
日期:——
A mild, practical and efficient palladium-catalyzed decarboxylative ortho-acylation of O-methyl ketoximes with α-keto acids via CâH bond activation is described. In these reactions, a broad range of O-methyl ketoximes and α-keto acids undergoes the decarboxylative cross-coupling reactions with high selectivities and good tolerance.
Palladium-Catalyzed Direct Acylation of Ketoximes and Aldoximes from the Alcohol Oxidation Level through C-H Bond Activation
作者:Satyasheel Sharma、Minyoung Kim、Jihye Park、Mirim Kim、Jong Hwan Kwak、Young Hoon Jung、Joa Sub Oh、Youngil Lee、In Su Kim
DOI:10.1002/ejoc.201300649
日期:2013.10
A highly efficient palladium-catalyzed oxidative ortho-acylation of O-methyl ketoximes and O-methyl aldoximes with benzylic and aliphatic alcohols from the alcohol oxidation level is described. This protocol potentially provides new opportunities to use readily available alcohols as starting materials for catalytic reactions, and represents a catalytic alternative to transcend the barriers imposed
Rhodium(III)-catalyzed [3+2] annulative coupling between oximes and electron-deficient alkynes
作者:Xukai Zhou、Songjie Yu、Zisong Qi、Xingwei Li
DOI:10.1007/s11426-015-5408-8
日期:2015.8
Rhodium(III)-catalyzedcoupling between ketoximes and alkynes via C-H activation and annulation typically followed the [4+2] selectivity to afford isoquinolines. By designing alkynes bearing a highly electron-withdrawing group and under substrate control, we have successfully switched the selectivity of the coupling between oximes and alkynes to the alternative [3+2] annulation, leading to the efficient
Carboxylate-Enhanced Rhodium(III)-Catalyzed Aryl C–H Alkylation with Conjugated Alkenes under Mild Conditions
作者:Zhao Zhang、Mengyao Tang、Shengnan Han、Lutz Ackermann、Jie Li
DOI:10.1021/acs.joc.6b02672
日期:2017.1.6
synthesis of β-aryl aldehydes and ketones from (hetero)aryl oximes, pyri(mi)dine, as well as pyrazoles and α,β-unsaturatedcarbonylcompounds has been developed under exceedingly mild reaction conditions. Thus, the versatile rhodium(III) catalysis features high step- and atom-economy, oxidant-free reaction conditions, and broad substrate scope.