Gabriele Bianchi et al.
FULL PAPERS
was evaporated under reduced pressure and the crude mix-
ture was filtered through a silica gel pad. The residue was
purified by column chromatography on silica gel (n-hex-
F. Marinelli, M. Verdecchia, Tetrahedron 2008, 64,
5364–5371.
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610–618.
ACHTUNGTRENNUNGane:EtOAc=90: 10) to afford 5c; yield: 81.0 mg (81%).
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Supporting Information
Experimental details and copies of H/13C NMR spectra of
1
all new compounds are available as supporting information.
Acknowledgements
The authors thank the Ministero dell’Universitꢀ, dell’Istru-
zione e della Ricerca (MIUR) – Roma and the Universitꢀ
degli Studi di L’Aquila for support of this work.
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