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
Palladium-Catalyzed Direct Selanylation of Chalcogenophenes and Arenes Assisted by 2-(Methylthio)amide
作者:Gul Badshah、Carla M. B. Gomes、Sher Ali、Eduardo Q. Luz、Gabriel L. Silvério、Francielli S. Santana、Diego Seckler、Douglas B. Paixão、Paulo H. Schneider、Daniel S. Rampon
DOI:10.1021/acs.joc.3c01577
日期:2023.10.6
The direct and selective conversion of a C–H bond into a C–Se bond remains a significant challenge, which is even more intricate with substrates having an innate regioselectivity under several reaction conditions, such as chalcogenophenes. We overrode their selectivity toward selanylation using palladium, copper, and the 2-(methylthio)amide directinggroup. This chelation-assisted direct selanylation