An efficient protocol for the cobalt-catalyzed preparation of diaryl sulfides from solid organozinc pivalates and commercially available diaryl disulfides is reported. This cross-coupling proceeds at roomtemperature and displays a good functional group tolerance, allowing the preparation of a diversity of symmetrical or asymmetrical diaryl sulfides in 60–95% yield.
Palladium-Catalyzed C(sp2)−H Olefination/Annulation Cascades of Aryl Carboxamides Assisted by N,S-Bidentate Auxiliary
作者:Ling Li、Xing-Guo Zhang、Xiao-Hong Zhang
DOI:10.1055/s-0037-1611799
日期:2019.8
auxiliary, with methyl acrylate is described. Various carboxamides with a number of functional groups were compatible with this reaction to afford, regioselectively and in moderate yield, (E)-3-methyleneisoindolin-1-one derivatives bearing an alkyl(aryl)thio group. A palladium(II)-catalyzed olefination/annulation of aryl carboxamides, assisted by an N, S-bidentate auxiliary, with methyl acrylate is described
Synthesis of indene-fused spiro-dibenz(ox)azepines <i>via</i> Rh(<scp>iii</scp>)-catalyzed cascade regioselective C–H activation/annulation
作者:Koushik Naskar、Sudip Karmakar、Imtiaj Mondal、Writhabrata Sarkar、Shantonu Roy、Anupam Roy、Indubhusan Deb
DOI:10.1039/d3cc01416a
日期:——
with diversefunctional group tolerance permitted the regioselective synthesis of a wide spectrum of indene-containing spirocyclic dibenz(ox)azepines in good to excellent yields. Also, we showcased detailed mechanistic studies to justify the formation of spirocycles. In addition, the synthetic utility of this process was also demonstrated by the modular synthesis of various steroid conjugates.