Cobalt-Catalyzed Allylation of Amides with Styrenes Using DMSO as Both the Solvent and the α-Methylene Source
作者:Xu Zhang、Zhi Zhou、Huiying Xu、Xuefeng Xu、Xiyong Yu、Wei Yi
DOI:10.1021/acs.orglett.9b02462
日期:2019.9.20
An efficient synthesis of privileged allylic amines has been developed via cobalt-catalyzed allylation of amides with styrenes, in which DMSO was used as both the solvent and the α-methylene source. This transformation features high yields, and selectivity for the (E)-isomer of the linear product. Through the experimental and computational investigations, a sequential K2S2O8-mediated oxidative cou
通过将酰胺与苯乙烯进行钴催化的烯丙基化反应,已经开发了一种有效的特权烯丙基胺的合成方法,其中DMSO既用作溶剂,又用作α-亚甲基源。该转化具有高收率和对线性产物的(E)-异构体的选择性。通过实验和计算研究,还推导了顺序的K 2 S 2 O 8介导的氧化偶联/钴辅助的区域选择性烯烃插入/β-H消除/烯烃解离/氢化物转移过程。
Neighboring group participation of halo and aryl groups in the stoichiometric and catalytic reactions of olefins with transition-metal hydrides and a new route to arene complexes
作者:Robert H. Crabtree、Michelle F. Mellea、Jennifer M. Quirk
DOI:10.1021/ja00322a029
日期:1984.5
[IrH 2 (Me 2 CO) 2 (PPh 3 ) 2 ] BF 4 reagit avec ArCH=CH 2 pour donner [Ir(η 6 -ArEt) L 2 ] BF 4 , suivant le substrat, il y a participation du groupe aryl
[IrH 2 (Me 2 CO) 2 (PPh 3 ) 2 ] BF 4 反应物 avec ArCH=CH 2 倾倒物 [Ir(η 6 -ArEt) L 2 ] BF 4 ,辅助底物,il ya参与du groupe aryl
Palladium-catalyzed regiodivergent hydroaminocarbonylation of alkenes to primary amides with ammonium chloride
作者:Bao Gao、Guoying Zhang、Xibing Zhou、Hanmin Huang
DOI:10.1039/c7sc04054g
日期:——
the synthesis of primary amides has long been an elusive aim. Here, we report an efficient catalytic system which enables inexpensive NH4Cl to be utilized as a practical alternative to gaseous ammonia for the palladium-catalyzed alkene-hydroaminocarbonylation reaction. Through appropriate choice of the palladium precursors and ligands, either branched or linear primary amides can be obtained in good
A Highly Active and General Catalyst for the Stille Coupling Reaction of Unreactive Aryl, Heteroaryl, and Vinyl Chlorides under Mild Conditions
作者:Dong-Hwan Lee、Yingjie Qian、Ji-Hoon Park、Jong-Suk Lee、Sang-Eun Shim、Myung-Jong Jin
DOI:10.1002/adsc.201300075
日期:2013.6.17
efficient and general catalyst in the Stillecouplingreaction of various aryl and heteroaryl chlorides with organostannanes. The results show that this catalytic system allows for the use of less reactive substrates such as deactivated or sterically hindered arylchlorides. A catalyst loading of 0.5 mol% was sufficient to achieve excellent performance under relatively mild reaction conditions. Furthermore
Palladium-Catalyzed Hydrocarbonylative C–N Coupling of Alkenes with Amides
作者:Xibing Zhou、Guoying Zhang、Bao Gao、Hanmin Huang
DOI:10.1021/acs.orglett.8b00538
日期:2018.4.20
An efficient palladium-catalyzed hydrocarbonylative C–N coupling of alkenes with amides has been developed. The reaction was performed via hydrocarbonylation of alkenes, followed by acyl metathesis with amides. Both intermolecular and intramolecular reactions proceed smoothly to give either branched or linear amides in high turnover number (3500) with NH4Cl or NMP·HCl as a proton source under the palladium