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Trisannelated Benzenes by Cyclotrimerization of Bromostannylalkenes

1997; Wiley; Volume: 36; Issue: 24 Linguagem: Inglês

10.1002/anie.199728051

1521-3773

Richard Durr, Sergio Cossu, Ottorino De Lucchi, Vittorio Lucchini,

Catalysis and Oxidation Reactions

Up to 80% yields of cyclotrimers, including 2 depicted below, can be achieved by reaction of bromo(stannyl)alkenes such as 1 with Cu(NO3)2 · 3H2O at room temperature in THF. This route, a definite improvement over previously reported methods, makes such molecules available in sufficient quantity for study, for example, as precursors of fullerene fragments.