One-Pot Copper-Catalyzed Three-Component Reaction of Sulfonyl Azides, Alkynes, and Allylamines To Access 2,3-Dihydro-1H-imidazo[1,2-a]indoles
作者:Bingwei Zhou、Yunkui Liu、Hongwei Jin、Daohong Liu
DOI:10.1055/s-0037-1610739
日期:2020.5
A copper-catalyzed multicomponent reaction of sulfonylazides, alkynes, and allylamines affording 2,3-dihydro-1H-imidazo-[1,2-a]indoles in moderate yields is reported. Four C–N bonds are constructed by way of azide-alkyne cycloaddition (CuAAC) and double Ullmann-type coupling reactions in a one-pot process.
Transition-Metal-Mediated Three-Component Cascade Cyclization: Selective Cage B–C(sp<sup>2</sup>) Coupling of Carborane with Aromatics and Synthesis of Carborane-Fused Tricyclics
作者:Yangjian Quan、Zaozao Qiu、Zuowei Xie
DOI:10.1021/ja503489b
日期:2014.5.28
Zirconium/nickel comediated one-pot three-component cascade cyclization of carboryne, alkene, and 2-bromophenyltrimethylsilylacetylene has been achieved, leading to the formation of a series of C,C,B-substituted carborane-fused tricyclics. On the basis of experimental results, a plausible mechanism is proposed including [2 + 2 + 1] cross-cyclotrimerization followed by intramolecular direct selective cage B-C(sp(2)) coupling. This represents the first example of direct cage B-C(phenyl) coupling via cage B-H activation.