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Beilstein J. Org. Chem. 2012, 8, 177–185, doi:10.3762/bjoc.8.19
Graphical Abstract
Figure 1: Tetrahydropyran ring containing natural products.
Scheme 1: Plausible side products mechanism.
Scheme 2: Plausible reaction mechanism via Prins cyclization.
Figure 2: Schematic NOE diagram of compound 3b.
Scheme 3: Deprotection of the hydroxy group.