Palladium-Catalyzed Decarboxylative Acylation of<i>O</i>-Phenyl Carbamates with α-Oxocarboxylic Acids at Room Temperature
作者:Satyasheel Sharma、Aejin Kim、Eonjeong Park、Jihye Park、Minyoung Kim、Jong Hwan Kwak、Sang Hwi Lee、Young Hoon Jung、In Su Kim
DOI:10.1002/adsc.201200993
日期:2013.3.11
A palladium‐catalyzed oxidative acylation of O‐phenyl carbamates with α‐oxocarboxylic acids via selective aromatic CH bond activation is described. This protocol represents the first ortho‐acylation of phenol derivatives, and a catalytic amount of triflic acid additive is crucial for this transformation.
Ruthenium-catalyzed oxidative C–H alkenylation of aryl carbamates
作者:Jie Li、Christoph Kornhaaß、Lutz Ackermann
DOI:10.1039/c2cc36196e
日期:——
A cationic ruthenium(II) catalyst enabled highly efficient oxidative alkenylations of electron-rich arenes bearing removable, weakly coordinating carbamates, and allowed for cross-dehydrogenative CâH bond functionalization in an aerobic manner.
Rhodium(III)-Catalyzed Oxidative <i>ortho</i>-Olefination of Phenyl Carbamates with Alkenes: Elucidation of Acceleration Mechanisms by Using an Unsubstituted Cyclopentadienyl Ligand
作者:Jin Tanaka、Yuki Nagashima、Ken Tanaka
DOI:10.1021/acs.orglett.0c02499
日期:2020.9.18
It has been established that an unsubstituted cyclopentadienyl (Cp) Rh(III) complex is an effective catalyst for the oxidative ortho-olefination of phenyl carbamates with both acrylates and styrenes under mild conditions. In addition, diolefination of a protected BINOL (1,1′-binaphthalene-2,2′-diol) proceeded in high yields and disubstituted acrylates could participate in this catalysis. Experimental
Cobalt-Catalyzed Direct Arylation and Benzylation by CH/CO Cleavage with Sulfamates, Carbamates, and Phosphates
作者:Weifeng Song、Lutz Ackermann
DOI:10.1002/anie.201202466
日期:2012.8.13
Inexpensive cobalt catalysts enable the first directarylation and benzylation of (hetero)arenes with aryl carbamates, sulfamates, and phosphates with ample scope. The non‐radical CH/COarylation reaction even proved viable at ambient temperature.
Regio- and Stereoselective Olefination of Phenol Carbamates through C-H Bond Functionalization
作者:Bin Li、Jianfeng Ma、Yujie Liang、Nuancheng Wang、Shansheng Xu、Haibin Song、Baiquan Wang
DOI:10.1002/ejoc.201201574
日期:2013.4
ortho-olefinated phenol carbamate, including a ruthenium(II)-catalyzed oxidative olefination of phenol carbamate with acrylates and a rhodium(III)-catalyzedalkynehydroarylation of phenol carbamate with internal alkynes through direct C–H activation, are reported. Both reactions afford substituted alkenes in a highly regio- and stereoselective manner.
可用于获得邻位烯烃化苯酚氨基甲酸酯的两种途径,包括钌 (II) 催化的苯酚氨基甲酸酯与丙烯酸酯的氧化烯烃化和铑 (III) 催化的苯酚氨基甲酸酯与内部炔烃通过直接 C-H 的炔烃加氢芳基化激活,报告。这两个反应都以高度区域和立体选择性的方式提供取代的烯烃。