Hague, Catherine, Patmore, Nathan J., Frost, Christopher G., Mahon, Mary F. and Weller, Andrew S. (2001) [(PPh3)Ag(CB11H6Y6)] (Y = H, Br): highly active, selective and recyclable Lewis acids for a hetero-Diels–Alder reaction. Chemical Communications (21). pp. 2286-2287. ISSN 1359-7345

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.

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