Ruthenium- and Sulfonamide-Catalyzed Cyclization between N-Sulfonyl Imines and Alkynes
摘要:
Ruthenium(II)-catalyzed redox-neutral annulative coupling of N-sulfonyl imines with alkynes has been achieved for the synthesis of indenamines, where a sulfonamide cocatalyst is necessary.
N‐tosylarylimines and alkynes via ruthenium(II)‐catalyzed CH bond activation and annulation is described. The catalytic reaction proceeds well with a broad substrate scope and in good yields. A possible mechanism is proposed that involves imine nitrogen chelation‐assisted ortho‐CH bond activation of the substrate, alkyne insertion, and intramolecular insertion of the CN Ts group into the CRu bond. Isotope‐labeling
Ruthenium- and Sulfonamide-Catalyzed Cyclization between <i>N</i>-Sulfonyl Imines and Alkynes
作者:Peng Zhao、Fen Wang、Keli Han、Xingwei Li
DOI:10.1021/ol302594w
日期:2012.11.2
Ruthenium(II)-catalyzed redox-neutral annulative coupling of N-sulfonyl imines with alkynes has been achieved for the synthesis of indenamines, where a sulfonamide cocatalyst is necessary.