Abstract
Noncatalytic acetylation of methyl 2,3-di-O-benzoyl-α-d-glucopyranoside with acetic acid or acetic anhydride proceeds regioselectively at the primary hydroxyl group and affords methyl 6-O-acetyl-2,3-di-O-benzoyl-α-d-glucopyranoside in good yield. The possibility of 6-O-acetylation should be taken into account when removing a 4,6-O-benzylidene protecting group with aqueous acetic acid at elevated temperature.
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This work was financially supported by the Russian Science Foundation (Project No. 19-43-02023).
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2228—2230, November, 2020.
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Tsvetkov, Y.E., Gening, M.L. & Nifantiev, N.E. Noncatalytic selective 6-O-acetylation of methyl 2,3-di-O-benzoyl-α-d-glucopyranoside with acetic acid and acetic anhydride. Russ Chem Bull 69, 2228–2230 (2020). https://doi.org/10.1007/s11172-020-3026-x
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DOI: https://doi.org/10.1007/s11172-020-3026-x