Efficient ligand-free nickel-catalyzed C-S cross-coupling of thiols with aryl iodides

NiCl2 center dot 6H(2)O efficiently catalyzes the C-S bond formation by the cross-coupling of aryl iodides with thiols in tetrabutylammonium bromide (TBAB) in excellent yield. The reaction functions in air and the NiLn-TBAB can be recovered and recycled without the loss of activity. (c) 2008 Elsevier Ltd. All rights reserved.