cyclometalated gold(III) complexes is reported. The bench‐stable bis(trifluoroacetyl) complexes 2 a,b perform very well in the intermolecular hydroarylation of alkynes. The reaction is broad in scope, it proceeds within few hours at 25 °C at catalytic loadings of 0.1–5 mol %. The electron‐rich arene adds across the C≡C bond with complete regio‐ and stereo‐selectivity. The significance of well‐defined gold(III)
A highly regioselective Cu-exchanged tungstophosphoric acid catalyst for hydroarylation and hydroamination of alkynes
作者:Nayeem Pasha、N. Seshu Babu、K.T. Venkateswara Rao、P.S. Sai Prasad、N. Lingaiah
DOI:10.1016/j.tetlet.2008.10.131
日期:2009.1
An efficient and reusable Cu-exchanged tungstophosphoric acid catalyst is demonstrated for the solvent free hydroarylation and hydroamination reactions of alkynes with numerous arene and amine derivatives, respectively. The catalyst exhibited exceptionally high activity and regioselectivity in both the reactions.
Disambiguation of Metal and Brønsted Acid Catalyzed Pathways for Hydroarylation with Platinum(II) Catalysts
作者:Miriam A. Bowring、Robert G. Bergman、T. Don Tilley
DOI:10.1021/om2000458
日期:2011.3.28
The hydroarylation of unactivated olefins effected by Pt(II) precatalysts was found to proceed through the in situ production of protic acid followed by a Friedel Crafts mechanism. The reaction was investigated using the hindered base 2,6-di-tert-butyl-4-methylpyridine and a variety of substrates.