L. Blackburn et al., Manganese dioxide can oxidise unactivated alcohols under in situ oxidation-Wittig conditions, CHEM COMMUN, (14), 1999, pp. 1337-1338
The in situ alcohol oxidation-Wittig reaction using manganese dioxide as th
e oxidant has been applied to semi-activated and, for the first time, unact
ivated alcohols to furnish the corresponding alpha,beta-unsaturated esters.