Stereospecific Iron-Catalyzed Carbon (sp<sup>2</sup>)–Carbon (sp<sup>2</sup>) Cross-Coupling of Aryllithium with Vinyl Halides
作者:Peng Chen、Zhi-Yong Wang、Xiao-Shui Peng、Henry N.C. Wong
DOI:10.1021/acs.orglett.1c01318
日期:2021.6.4
We present herein an efficient synthetic protocol involving iron-catalyzed cross-coupling of organolithium compounds with vinyl halides as key coupling partners. More than 30 examples were obtained with moderate to good yields and high stereoselectivities. The practicality of this method is evidenced by a gram-scale synthesis. In addition, a preliminary mechanistic investigation was also performed
Palladium-Catalyzed Fluorosulfonylvinylation of Organic Iodides
作者:Gao-Feng Zha、Qinheng Zheng、Jing Leng、Peng Wu、Hua-Li Qin、K. Barry Sharpless
DOI:10.1002/anie.201701162
日期:2017.4.18
A palladium‐catalyzed fluorosulfonylvinylation reaction of organiciodides is described. Catalytic Pd(OAc)2 with a stoichiometric amount of silver(I) trifluoroacetate enables the coupling process between either an (hetero)aryl or alkenyl iodide with ethenesulfonyl fluoride (ESF). The method is demonstrated in the successful syntheses of eighty‐eight otherwise difficult to access compounds, in up to
Copper-Mediated Difluoromethylation of Aryl and Vinyl Iodides
作者:Patrick S. Fier、John F. Hartwig
DOI:10.1021/ja301013h
日期:2012.3.28
straightforward method for the cross-coupling of aryl and vinyliodides with a difluoromethyl group generated from readily available reagents to form difluoromethylarenes and difluoromethyl-substituted alkenes. The reaction of electron-neutral, electron-rich, and sterically hindered aryl and vinyliodides with the combination of CuI, CsF and TMSCF(2)H leads to the formation of difluoromethyl-substituted
[EN] DIFLUOROMETHYLATION OF ARYL AND VINYL IODIDES<br/>[FR] DIFLUOROMÉTHYLATION D'IODURES D'ARYLE ET DE VINYLE
申请人:UNIV CALIFORNIA
公开号:WO2013134296A1
公开(公告)日:2013-09-12
Selectively fluorinated molecules are important as materials, pharmaceuticals, and agrochemicals, but their synthesis by simple, mild, laboratory methods is challenging. We report a straightforward method for the cross-coupling of a difluoromethyl group with readily available reagents to form difluoromethylarenes. The reaction of electron-neutral, electronrich, and sterically hindered aryl and vinyl iodides with the combination of Cul, CsF and TMSCF2H leads to the formation of difluoromethylarenes in high yield with good functional group compatibility. This transformation is surprising, in part, because of the prior observation of the instability of CuCF2H.
Ligand-Free Iron-Catalyzed Carbon(sp<sup>2</sup>)–Carbon(sp<sup>2</sup>) Cross-Coupling of Alkenyllithium with Vinyl Halides
作者:Qiang Liu、Zhi-Yong Wang、Xiao-Shui Peng、Henry N. C. Wong
DOI:10.1021/acs.joc.8b00510
日期:2018.6.15
An efficient ligand-free iron-catalyzedcross-couplingreaction involving alkenyllithium and vinyl iodides was developed to form diene species in moderate to good yields. This new iron-catalyzedcross-couplingreaction provides a mild, inexpensive, and environmentally friendly avenue toward synthesis of diversified diene derivatives.