Intermolecular C–H Amidation of Alkenes with Carbon Monoxide and Azides via Tandem Palladium Catalysis
作者:Zheng-Yang Gu、Yang Wu、Xiaoguang Bao、Ji-Bao Xia、Feng Jin
DOI:10.1055/a-1401-4486
日期:2021.9
alkenes with carbonmonoxide and organic azides has been developed for the synthesis of alkenyl amides. The reaction proceeds efficiently without an ortho-directing group on the alkene substrates. Nontoxic dinitrogen is generated as the sole by-product. Computational studies and control experiments have revealed that the reaction takes place via an unexpected mechanism by tandem palladium catalysis.
<i>N</i>-Sulfonyl acetylketenimine as a highly reactive intermediate for the synthesis of <i>N</i>-sulfonyl amidines
作者:Weiguang Yang、Dayun Huang、Xiaobao Zeng、Dongping Luo、Xinyan Wang、Yuefei Hu
DOI:10.1039/c8cc04699a
日期:——
A highly reactive intermediate N-sulfonyl acetylketenimine was generated from a 3-butyn-2-one participating CuAAC/ring-opening method. Its high reactivity due to bearing two EWGs allowed us to offer the first example of a reaction between ketenimine and amide to synthesize N-sulfonyl amidines efficiently.
作者:Yang Liu、Zhongyi Mao、Alexandre Pradal、Pei-Qiang Huang、Julie Oble、Giovanni Poli
DOI:10.1021/acs.orglett.8b01616
日期:2018.7.6
The synthesis of bi- and tricyclic structures incorporating pyrrolidone rings is disclosed, starting from resonance-stabilized acetamides and cyclic α,β-unsaturated-γ-oxycarbonyl derivatives. This process involves an intermolecular Tsuji–Trost allylation/intramolecular nitrogen 1,4-addition sequence. Crucial for the success of this bis-nucleophile/bis-electrophile [3 + 2] annulation is its well-defined
N-Sulfonyl acetylketenimine as a highly reactive intermediate for synthesis of N-Aroylsulfonamides
作者:Weiguang Yang、Dayun Huang、Xiaobao Zeng、Jianlan Zhang、Xinyan Wang、Yuefei Hu
DOI:10.1016/j.tet.2018.12.005
日期:2019.1
A highlyreactiveintermediate N-sulfonyl acetylketenimine was generated from an ynone-participated CuAAC/ring-opening method. Its unique structure allowed it to react with aryl carboxylic acids to give N-aroylsulfonamides via a novel Mumm-type rearrangement.