Synthesis of New Heterocycles through
a Cation-Driven Tandem
Ring-Enlargement−Annulation Reaction

Bernard, Angela M.; Cadoni, Enzo; Frongia, Angelo; Piras, Pier P.; Secci, Francesco

doi:10.1021/ol026199x.s001

Synthesis of New Heterocycles through a Cation-Driven Tandem Ring-Enlargement−Annulation Reaction

journal contribution

posted on 2002-06-27, 00:00 authored by Angela M. Bernard, Enzo Cadoni, Angelo Frongia, Pier P. Piras, Francesco Secci

The thionium ion, generated through a cyclopropylcarbinyl-cyclobutyl ring expansion, is, for the first time, intramolecularly intercepted by activated aromatic rings to generate new versatile 2a-methyl-8b-(phenylsulfanyl-1,2a,3,8b-tetrahydro-2H-cyclobuta[c]chromenes.

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Synthesis of New Heterocycles through a Cation-Driven Tandem Ring-Enlargement−Annulation Reaction

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