A nickel(II)-catalyzed alkynylation/annulation of aryl carboxamides assisted by an N, S-bidentate directing group with terminal alkynes is described. This protocol provides an effective method to selectively furnish a series of biologically 3-methyleneisoindolin-1-one derivatives bearing methylthio group. Various carboxamides and terminal alkynes with a number of functional groups were compatible in
Diverse Visible‐Light‐Promoted Functionalizations of Benzotriazoles Inspired by Mechanism‐Based Luminescence Screening
作者:Michael Teders、Adrián Gómez‐Suárez、Lena Pitzer、Matthew N. Hopkinson、Frank Glorius
DOI:10.1002/anie.201609393
日期:2017.1.16
Three new visible‐light‐promotedfunctionalizations of benzotriazole substrates were discovered using a mechanism‐basedscreening method. ortho‐Thiolated, borylated, and alkylated N‐arylbenzamide products were obtained under mild reaction conditions in a new denitrogenative synthetic approach to functionalized aniline derivatives. The functional group tolerance of the borylation reaction was further
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