1 Stereocontrolled Assembly of Tetrasubstituted Tetrahydrofurans: A Concise Synthesis of Virgatusin Tito Akindele, † Stephen P. Marsden* ,† and John G. Cumming ‡ School of Chemistry, University of Leeds, Leeds LS2 9JT, U.K., and AstraZeneca, Mereside, Alderley Park, Macclesfield SK10 4TG, U.K. s.p.marsden@leeds.ac.uk Supporting information and spectra