C(sp)–C(sp<sup>3</sup>) Bond Formation through Cu-Catalyzed Cross-Coupling of<i>N</i>-Tosylhydrazones and Trialkylsilylethynes
作者:Fei Ye、Xiaoshen Ma、Qing Xiao、Huan Li、Yan Zhang、Jianbo Wang
DOI:10.1021/ja3004792
日期:2012.4.4
Copper-catalyzed cross-coupling of N-tosylhydrazones with trialkylsilylethynes leads to the formation of C(sp)-C(sp(3)) bonds. Cu carbene migratory insertion is proposed to play the key role in this transformation.
Palladium(0)-catalyzed C(sp<sup>3</sup>)–Si bond formation <i>via</i> formal carbene insertion into a Si–H bond
作者:Zhenxing Liu、Jingfeng Huo、Tianren Fu、Haocheng Tan、Fei Ye、Mohammad Lokman Hossain、Jianbo Wang
DOI:10.1039/c8cc06768f
日期:——
Pd(0)-Catalyzed formal carbene insertion into Si–H bonds has been achieved as an efficient method for C(sp3)–Si bond formation. The reaction, which uses readily available N-tosylhydrazones as the diazo precursors, is highly efficient and shows a wide substrate scope. Rh(II) and Cu(I) salts, which are the widely used catalysts for carbene insertion reactions, have been proved to be ineffective for the
Cyclopropylmethyl Palladium Species from Carbene Migratory Insertion: New Routes to 1,3-Butadienes
作者:Lei Zhou、Fei Ye、Yan Zhang、Jianbo Wang
DOI:10.1021/ol2034405
日期:2012.2.3
Cyclopropylmethyl palladium species can be accessed by Pd-catalyzed reaction of either cyclopropyl N-tosylhydrazone with halide or N-tosylhydrazone with cyclopropyl halide. In both approaches migratory insertion of Pd carbene is the key process. These transformations constitute new approaches toward 1,3-butadiene derivatives.
Cu(I)-catalyzed cascade reaction of N-tosylhydrazones with 3-butyn-1-ol: A new synthesis of tetrahydrofurans
作者:Mohammad Lokman Hossain、Kang Wang、Fei Ye、Yan Zhang、Jianbo Wang
DOI:10.1016/s1872-2067(16)62565-2
日期:2017.1
Abstract The Cu(I)-catalyzedcascade coupling/cyclization reaction of N -tosylhydrazones with 3-butyn-1-ol has been explored. This new strategy represents a simple platform for the synthesis of tetrahydrofurans in moderate to good yields.
Synthesis of Terminal Allenes through Copper-Mediated Cross-Coupling of Ethyne with<i>N</i>-Tosylhydrazones or α-Diazoesters
作者:Fei Ye、Chengpeng Wang、Xiaoshen Ma、Mohammad Lokman Hossain、Ying Xia、Yan Zhang、Jianbo Wang
DOI:10.1021/jo502316q
日期:2015.1.2
Ethyne is employed as coupling partner in copper-mediated cross-coupling reactions with N-tosylhydrazones and alpha-diazoacetate, leading to the development of a new synthetic method for terminal allenes. With this novel coupling method, the terminal allenes were obtained in good yields and with excellent functional group tolerance. Copper carbene migratory insertion is proposed as the key step in these transformations.