RuCl3-Catalyzed Regioselective Diarylation with Aryl Tosylates via C-H Activation
摘要:
The direct arylation of arylpyridines with aryl tosylates was carried out smoothly in the presence of 2.5mol% RuCl3 using MesCOOH as crucial promoter to generate biarylated products. The method is simple, efficient, safe, and regioselective, can be performed in the absence of expensive ligands, and does not require any precautions with regard to the exclusion of air and moisture. The biarylated products were obtained in good yields. Supplemental materials are available for this article. Go to the publisher's online edition of Synthetic Communications (R) to view the free supplemental file.
Efficient rhodium(I)-catalyzed regioselective direct arylation and alkenylation of aromatic C−H bonds has been realized with aromatic carboxylic and cinnamic anhydrides as the coupling partners via decarbonylation and C−H activation under phosphine-free conditions.
The direct arylation of aryl iodides with 2-phenylpyridines and related substrates was carried out smoothly in the presence of 5 mol% RuCl3 using benzoyl peroxide as a promoter to generate biarylated products in high yields. The method is simple, efficient, and regioselective, and employs only commercially available reagents.