The Mechanism of Gold(I)-Catalyzed Hydroalkoxylation of Alkynes: An Extensive Experimental Study
作者:Alexander Zhdanko、Martin E. Maier
DOI:10.1002/chem.201303795
日期:2014.2.10
An extensiveexperimentalstudy of the mechanism of gold(I)‐catalyzed hydroalkoxylation of internal alkynes has been conducted by using NMR spectroscopy. This study was focused on the organogold intermediates, observations of actual catalytic intermediates in situ, and the reaction kinetics that are involved in this reaction. Based on the experimental results, a complete mechanistic picture was established
Csp–Csp<sup>3</sup> Bond Formation via Iron(III)-Promoted Hydroalkynylation of Unactivated Alkenes
作者:Yangyong Shen、Bo Huang、Jing Zheng、Chen Lin、Yu Liu、Sunliang Cui
DOI:10.1021/acs.orglett.7b00499
日期:2017.4.7
An iron(III)-promoted hydroalkynylation of unactivated alkenes toward Csp–Csp3 bond formation has been developed. Various alkenes, including mono-, di-, and trisubstituted alkenes, could all smoothly convert to structural diversified alkynes in this chemoselective protocol. Additionally, the scalability was unraveled and the further divergent transformations of products were conducted to demonstrate
Rh(II)-Catalyzed Chemoselective Oxidative Amination and Nucleophilic Trapping of <i>gem</i>-Dimethyl Alkynyl-Tethered Sulfamates
作者:Dong Pan、Yin Wei、Min Shi
DOI:10.1021/acs.orglett.7b03425
日期:2018.1.5
A Rh(II)-catalyzed chemoselective oxidative amination and nucleophilic trapping of gem-dimethyl sulfamates has been presented. For 2,2-dimethyl-4-arylbut-3-yn-1-yl sulfamates, the reactions underwent a metallonitrene-initiated alkyne oxidation along with nucleophilic trapping of H2O upon oxidation, giving aroyl group containing heterocycles. For 2,2-dimethyl-4-arylpent-3-yn-1-yl sulfamates, the α-iminometal
Catalyst-Dependent Divergent Synthesis of Pyrroles from 3-Alkynyl Imine Derivatives: A Noncarbonylative and Carbonylative Approach
作者:Gen-Qiang Chen、Xiao-Nan Zhang、Yin Wei、Xiang-Ying Tang、Min Shi
DOI:10.1002/anie.201405215
日期:2014.8.4
A novel Ru0‐ and RhI‐catalyzed noncarbonylative and carbonylative cycloisomerization of readily available 3‐alkynylimine derivatives has been developed to provide 3,4‐fused or nonfused pyrrole derivatives efficiently in moderate to excellent yields. The key steps involve the formation of a ruthenium carbenoid intermediate or a rhodacycle intermediate, respectively. In these reactions, CO can serve
Gold catalyzed synthesis of fluorinated tetrahydrofurans and lactones
作者:Deepika Malhotra、Leping Liu、Weibo Wang、Mallory Durham、Gerald B. Hammond、Bo Xu
DOI:10.1016/j.jfluchem.2014.05.014
日期:2014.11
The gold catalyzed tandemcycloisomerization/fluorination of alkynylic alcohols gives difluoro hydroxyl tetrahydrofurans at roomtemperature in moderate to good yields. The gold catalyzed monofluorolactonization of alkynylic acids to the corresponding fluoro lactones was also explored.