Regioselective and Stereospecific Cross-Coupling of Primary Allylic Amines with Boronic Acids and Boronates through Palladium-Catalyzed CN Bond Cleavage
作者:Man-Bo Li、Yong Wang、Shi-Kai Tian
DOI:10.1002/anie.201109171
日期:2012.3.19
The NH2 group serves as an effective leaving group in the palladium‐catalyzed regioselective and stereospecific title reaction (see scheme). The reaction works well with aryl‐ and alkenylboronic acids and aryl‐, alkenyl‐, allyl‐, and benzylboronates, and complete transfer of chirality has been achieved when using α‐chiral primary allylic amines as the allylic electrophiles.
Palladium Membrane-Installed Microchannel Devices for Instantaneous Suzuki-Miyaura Cross-Coupling
作者:Yoichi M. A. Yamada、Toshihiro Watanabe、Tomohiko Beppu、Naoshi Fukuyama、Kaoru Torii、Yasuhiro Uozumi
DOI:10.1002/chem.201000511
日期:——
Instantaneous catalytic carbon–carbon bond‐forming reactions were achieved in catalytic membrane‐installed microchanneldevices that have a polymeric palladium‐complex membrane. The catalytic membrane‐installed microchanneldevices were provided inside the microchannels by means of coordinative and ionic molecular convolution at the interface between the organic and aqueous phases flowing laminarly
Palladium-Catalyzed Allylic Cross-Coupling Reactions of Primary and Secondary Homoallylic Electrophiles
作者:Benjamin J. Stokes、Susanne M. Opra、Matthew S. Sigman
DOI:10.1021/ja305403s
日期:2012.7.18
cross-coupling of homoallylic tosylate substrates using boronic acids and pinacol esters is reported. The reaction uses 2-(4,5-dihydro-2-oxazolyl)quinoline (quinox) as a ligand and is performed at ambient temperature. The scope of the reaction is broad in terms of both the boronate transmetalating reagent and the substrate and includes secondary tosylates. Mechanistic studies support an alkene-mediated
Iron-catalyzed alkylation of α-oxo ketene dithioacetals
作者:Qin Yang、Ping Wu、Jiping Chen、Zhengkun Yu
DOI:10.1039/c4cc02264e
日期:——
Iron-catalyzed alkylation of α-oxo ketene dithioacetals by styrenes efficiently afforded highly functionalized tetrasubstituted olefins.
铁催化的α-氧酮二硫代醛与苯乙烯的烷基化反应高效地合成了高度官能化的四取代烯烃。
Silver-catalyzed decarboxylative C(sp<sup>2</sup>)–C(sp<sup>3</sup>) coupling reactions <i>via</i> a radical mechanism
作者:Zhongxue Fang、Chenlong Wei、Jing Lin、Zhenhua Liu、Wei Wang、Chenshu Xu、Xuemin Wang、Yu Wang
DOI:10.1039/c7ob02455j
日期:——
A silver catalyzed decarboxylative C(sp2)–C(sp3) coupling of vinylic carboxylic acids with alcohols, alkylbenzenes, cycloalkanes and cyclic ethers was developed by using DTBP as an oxidant. This reaction tolerates a wide range of substrates, and products are obtained in good to excellent yields. The reaction also shows good stereoselectivity, and only trans-isomers are obtained. In addition, a radical