Chemistry Letters, Vol.32, No.1, 14-15, 2003
Synthesis of tungsten thienyl complexes via C-H bond activation of thiophenes
The reactions Of cis-CP*W(CO)(2)(MeCN)Me (1) with thiophene or 3-methylthiophene resulted in selective alpha-C-H bond activation to give cis-CP*W(CO)(2)(MeCN)R [R = 2-C4H3S (2a), 2-C4H2S-4-Me (2b)]. 2a reacted with 3-methylthiophene to afford thienyl exchange products 2b and thiophene in addition to decomposition products. Reversibility of the exchange reaction was shown by the reaction of 2b with thiophene.