Acylation of secondary alcohol group
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Often selective acylation of the primary hydroxyl group of a primary- secondary diol is required, in particular, selective acety- lation of hydroxyl.

Transesterification/Acylation of Secondary Alcohols Mediated by N-Heterocyclic Carbene . Protection for the Hydroxyl Group, Including 1,2- and 1,3-Diols.
Key Words: Primary and secondary aliphatic alcohols, acetic anhydride, graphite bisulphate, acety- lation.
Introduction. Alcoholic hydroxy groups are common.
Khan, L.
Video: Acylation of secondary alcohol group Oxidation of Alcohols - PCC, H2CrO4 & Swern Oxidation
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Among various hydroxyl groups protecting moieties, acetyl is primary alcohols are acetylated in the presence of secondary (entry 1) or tertiary. The alkyl hydroxyl groups, including primary and secondary alcohols, were selectively acylated in the presence of phenolic hydroxyl groups in good yields.
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Ishihara, J. Diacyl disulfides offer excellent moisture tolerance, high efficiency, and potential in synthetic chemistry and biologically meaningful natural product modification.
