30. [(PPh3)Ag(CB11H6y6)] (Y = H, Br): Highly Active, Selective and Recyclable Lewis Acids for a Hetero-Diels-Alder Reaction
Chemical Communications 2001, 2286-2287
Hague, C.; Patmore, N. J.; Frost, C. G.; Mahon, M. F.; Weller, A. S.
The complex [(PPh3)Ag(CB11H6Br6)] 1 is an effective and selective catalyst (0.1 mol% loading) for a hetero-Diels-Alder reaction, which shows a marked dependence on the presence of trace amounts of water, while addition of Ag[Y] [Y = CB11H12, CB11H6Br6, O3SCF3] to a phosphine functionalised support gives an efficient and recyclable Lewis acid catalyst for this transformation.
