Direct arylation of n-heteroarenes with aryldiazonium salts by photoredox catalysis in water
A highly effective visible light-promoted "radical-type" coupling of N-heteroarenes with aryldiazonium salts in water has been developed. The reaction proceeds at room temperature with [Ru(bpy)3]Cl 2×6 H2O as a photosensit
Palladium-catalyzed direct arylation of N-heteroarenes with arylsulfonyl hydrazides
Hydrazides applied: A palladium-catalyzed direct Ci-H arylation of heteroarenes, with arylsulfonyl hydrazides as the arylating reagents, has been developed (see scheme). The reaction is chemoselective, in that arylsulfonyl hydrazides containing halogen substituents can be employed without participation of the halogen substituent in the reaction. The method offers a straightforward approach to a variety of aryl-heteroaryl compounds. Copyright
Liu, Bo,Li, Jian,Song, Feijie,You, Jingsong
supporting information; experimental part
p. 10830 - 10833
(2012/09/22)
Palladium-catalyzed desulfitative C-H arylation of heteroarenes with sodium sulfinates
Desulfitative C-H arylation: Palladium-catalyzed desulfitative C-H arylation of heteroarenes with sodium sulfinates has been disclosed to construct aryl-heteroaryl bonds without the need for any extra ligands (see scheme). Copyright