The First General Palladium Catalyst for the Suzuki−Miyaura and Carbonyl Enolate Coupling of Aryl Arenesulfonates
作者:Hanh Nho Nguyen、Xiaohua Huang、Stephen L. Buchwald
DOI:10.1021/ja036947t
日期:2003.10.1
for the palladium-catalyzed Suzuki-Miyaura and carbonyl enolate coupling of unactivated aryl arenesulfonates was developed utilizing XPhos, 1, and Pd(OAc)2. This is of significant interest because aryl tosylates and aryl benzenesulfonates are more easily handled and considerably less expensive than aryl triflates. This catalyst system effects the coupling of a variety of aryl, heteroaryl, and extremely
Preparation of α,β-unsaturated esters and amides via external-CO-free palladium-catalyzed carbonylation of alkenyl tosylates
作者:Tsuyoshi Ueda、Hideyuki Konishi、Kei Manabe
DOI:10.1016/j.tetlet.2012.07.057
日期:2012.9
monoxide nor any pressure-resistant apparatus. A variety of cyclic and acyclic alkenyl tosylates can be converted into the corresponding phenyl esters in good yields. Furthermore, this method is effective for the one-pot synthesis of α,β-unsaturatedamides.
Palladium-catalysed mono-α-alkenylation of ketones with alkenyl tosylates
作者:Yong Wu、Wai Chung Fu、Chien-Wei Chiang、Pui Ying Choy、Fuk Yee Kwong、Aiwen Lei
DOI:10.1039/c6cc08392g
日期:——
The first example of palladium-catalysed selective mono-[small alpha]-alkenylation of ketones with alkenyl tosylates is described. In the presence of Pd/XPhos catalyst system (0.1-1.0 mol%), the reaction provides mono--alkenylated of ketones in...
General Synthesis of Alkenyl Sulfides by Palladium-Catalyzed Thioetherification of Alkenyl Halides and Tosylates
作者:Noelia Velasco、Cintia Virumbrales、Roberto Sanz、Samuel Suárez-Pantiga、Manuel A. Fernández-Rodríguez
DOI:10.1021/acs.orglett.8b00854
日期:2018.5.18
ligand is reported. These reactions occur under low catalyst loading and in high yields and display widescope, including the coupling of bulky thiols and trisubstituted bromoolefins, and functional group tolerance. In addition, the thioetherification of less reactive chloroalkenes and, for the first time, alkenyl tosylates was accomplished using a catalyst generated from CyPFtBu alkylbisphosphine ligand
据报道,链烯基溴化物与硫醇的交联反应是由廉价dppf配体衍生的钯配合物催化的。这些反应在低催化剂负载和高收率下发生,并显示出较宽的范围,包括大体积硫醇和三取代溴代烯烃的偶联以及官能团的耐受性。另外,使用由CyPF t Bu烷基双膦配体产生的催化剂实现了反应性较低的氯代烯烃的硫醚化以及首次甲苯基甲苯磺酸酯的硫醚化。
Enantioselective Hydroalkenylation of Olefins with Enol Sulfonates Enabled by Dual Copper Hydride and Palladium Catalysis
作者:Alexander W. Schuppe、James Levi Knippel、Gustavo M. Borrajo-Calleja、Stephen L. Buchwald
DOI:10.1021/jacs.1c02117
日期:2021.4.14
The catalytic enantioselective synthesis of α-chiral olefins represents a valuable strategy for rapid generation of structural diversity in divergent syntheses of complex targets. Herein, we report a protocol for the dual CuH- and Pd-catalyzed asymmetric Markovnikov hydroalkenylation of vinyl arenes and the anti-Markovnikov hydroalkenylation of unactivated olefins, in which readily available enol triflates