A. Vijay Kumar

Indium-Catalyzed C−S Cross-Coupling of Aryl Halides with Thiols

Indium-catalyzed C-S cross-coupling of aromatic and alkane thiols with aryl halides proceeds smoothly in the presence of In(OTf)(3) (10 mol %), TMEDA (20 mol %), and KOH as a base in DMSO at 135 degrees C. When this protocol was utilized, a variety of thiols could be cross-coupled with aryl halides to afford the corresponding aryl sulfides in good to excellent yields.

Recyclable Heterogeneous Iron Catalyst for C-N Cross-coupling under Ligand-free Conditions

An efficient and ligand-free C-N cross-coupling of aryl halides with various heterocycles using Fe/C(g) as a recyclable catalyst is reported. The yields are excellent to moderate.

Unexpected C−Se Cross-Coupling Reaction: Copper Oxide Catalyzed Synthesis of Symmetrical Diaryl Selenides via Cascade Reaction of Selenourea with Aryl Halides/Boronic Acids

Selenourea is used as an effective selenium surrogate in the C-Se cross-coupling reaction catalyzed by copper oxide nanoparticles under ligand free conditions. This protocol has been utilized for the synthesis of a variety of symmetrical diaryl selenides in good to excellent yields from the readily available aryl halides/boronic acids.