SCHEDULED MAINTENANCE
While conventional monobenzylation of benzyl 6-O-allyl-2-O-benzyl-α-D-galactopyranoside (1) gives a four component mixture, treatment of the OO′-dibutyl-stannylidene derivative of (1) with benzyl bromide provides only the 3-O-benzyl ether (2) in 66% isolated yield.
C. Augé, S. David and A. Veyrières, J. Chem. Soc., Chem. Commun., 1976, 375 DOI: 10.1039/C39760000375
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