Palladium-catalyzed <i>N</i>-arylsulfonamide formation from arylsulfonyl hydrazides and nitroarenes
作者:Feng Zhao、Bin Li、Huawen Huang、Guo-Jun Deng
DOI:10.1039/c5ra26588f
日期:——
A palladium-catalyzed construction for N-arylsulfonamide from nitroarenes and arylsulfonylhydrazides is developed. In this protocol, abundant and stable nitroarenes serve as the nitrogen sources by in situ reduction reaction of hydrogen released from arylsulfonylhydrazides. No external oxidants or reductants are needed for this kind of transformation.
Bissulfonamide derivatives of formula (I) are capable of inhibiting: a) the biosynthesis of aromatic amino acids via the shikimate pathway and b) the catabolism of quinic acid, wherein: Ar is an aryl or heteroaryl group; R1 and R2 are the same or different and each represent hydrogen or alkyl or R1 and R2 together form a C1-C3 alkylene group, -CO- or -CS-; and R3 and R4 are the same or different and each represent -alkyl-aryl, -alkyl-heteroaryl, -alkenyl-aryl, -alkenyl-heteroaryl, -alkynyl-aryl-alkynyl-heterorayl, aryl or heteroaryl.
Copper-Catalyzed Aminoarylation of Alkenes via Aminyl Radical Addition and Aryl Migration
作者:Jin-Lin Wang、Mei-Ling Liu、Jian-Yu Zou、Wen-Hui Sun、Xue-Yuan Liu
DOI:10.1021/acs.orglett.1c03973
日期:2022.1.14
We describe a new strategy for aminoarylation of alkenes by copper-catalyzed smilesrearrangement using O-benzoylhydroxylamines as the amine reagent. This method affords various β-amino amide derivatives possessing a quaternary carbon center with wide functional group tolerance and high regioselectivity. The mechanistic studies indicate that the transformation can involve aminyl radical intermediates
metal-free one-pot two-step synthesis of sulfonamides from readily available nitroarenes and sodium arylsulfinates in a mixture of methanol and water has been developed. In this procedure, the aryl amines were produced in situ by the reduction of nitroarenes mediated by diboronic acid, and then coupled with sodium arylsulfinates in the presence of iodine. A series of N-arylsulfonamides with various functional