Intramolecular 1,5-H transfer reaction of aryl iodides through visible-light photoredox catalysis: a concise method for the synthesis of natural product scaffolds
The intramolecular 1,5-H transfer reaction of the aryl radicals generated from unactivited aryl iodides by photocatalysis is described. The features of this transformation are operational simplicity, excellent yields, mild reaction...
mild visible‐light‐induced Pd‐catalyzed intramolecular C−H arylation of amides is reported. The method operates by cleavage of a C(sp2)−O bond, leading to hybrid aryl Pd‐radical intermediates. The following 1,5‐hydrogen atom translocation, intramolecular cyclization, and rearomatization steps lead to valuable oxindole and isoindoline‐1‐one motifs. Notably, this method provides access to products with
Nickel-Catalyzed Aromatic C–H Alkylation with Secondary or Tertiary Alkyl–Bromine Bonds for the Construction of Indolones
作者:Chao Liu、Dong Liu、Wei Zhang、Liangliang Zhou、Aiwen Lei
DOI:10.1021/ol403021p
日期:2013.12.20
A nickel-catalyzed aromatic C-H alkylation with tertiary or secondary alkyl-Br bonds for the construction of indolones was demonstrated. Various functional groups were well tolerated. Moreover, the challenging secondary alkyl bromides were well introduced in this transformation. Radical trapping and photocatalysis conditions exhibited that it is most likely to be a radical process for this aromatic C-H alkylation.