Clamped by the acid-resistant phenylsulfonylethylidene (PSE) acetal, d-glucal privileged the additive pathway over the Ferrier I rearrangement when confronted with protic nucleophiles.
Fernandes, A., Dell’Olmo, M., Tatibouët, A., Imberty, A., Philouze, C., & Rollin, P. (2008). Dramatic effect of PSE clamping on the behaviour of d-glucal under Ferrier I conditions. Tetrahedron Letters, 49(21), 3484-3488. https://doi.org/10.1016/j.tetlet.2008.03.093 (Original work published 2008)