osmium-catalyzed dihydroxylation has uncovered that electron-deficient olefins are converted into the corresponding diols much more efficiently when the pH of the reaction medium is maintained on the acidic side. Further studies have identified citric acid as the additive of choice, for it allows preparation of very pure diols in yields generally exceeding 90%. As described here, a much wider range of olefin classes
Benzoyl Shift: A New Approach to Reverse Regioselectivity in the Monoprotection of vic-Diols
作者:Camille Oger、Jean-Marie Galano、Aurélien de la Torre、Valérie Bultel-Poncé、Thierry Durand
DOI:10.1055/s-0035-1561496
日期:——
monoprotected vic-diols is described. Triggered under mild conditions, this transformation allows regioselective protection of the least acidic hydroxyl function of an activated vic-diol. The benzoyl shift in monoprotected vic-diols is described. Triggered under mild conditions, this transformation allows regioselective protection of the least acidic hydroxyl function of an activated vic-diol.