The oxidative cyclization of aromatic and heteroaromatic nitriles with alkynes in the presence of a catalytic amount of [RuCl2(p-cymene)}2], Cu(OAc)2.H2O and KPF6 in acetic acid under air gave isoquinolones in good to excellent yields.
<i>N</i>-Sulfonylcarboxamide as an Oxidizing Directing Group for Ruthenium-Catalyzed C-H Activation/Annulation
作者:Elina Petrova、Dace Rasina、Aigars Jirgensons
DOI:10.1002/ejoc.201601582
日期:2017.4.3
N-Sulfonylcarboxamides can act as both a directinggroup for C–H activation and an internal oxidant in the Ru-catalyzedannulation reaction with alkynes to give isoquinolones. Of all of the N-sulfonylcarboxamides that were studied, the N-(2,6-difluorophenyl)sulfonamide derivatives were found to be the most efficient and led to the formation of an unstable sulfinate byproduct that decomposed into 1
Ruthenium-Catalyzed C–H/N–O Bond Functionalization: Green Isoquinolone Syntheses in Water
作者:Lutz Ackermann、Sabine Fenner
DOI:10.1021/ol202861k
日期:2011.12.16
Ruthenium-catalyzed isoquinolone syntheses with ample scope were accomplished through carboxylate assistance in environmentally benign water as a reaction medium. The high chemoselectivity of the ruthenium(II) carboxylate complex also set the stage for the direct use of free hydroxamic acids for annulations of alkynes.