Abstract
We report herein the synthesis and the X-ray crystal structure of 2-azido-2-deoxy-3,4-O-isopropylidene-α-d-galactopyranosyl-N-oxyphthalimide 3 which is the key-precursor of a cancer-related STn antigen analogue 5. Compound 3 crystallizes from a mixture of dichloromethane/pentane as colorless orthorhombic needles in P2 1 2 1 2 space group with the following cell parameters: a = 14.039(2) Å; b = 16.574(3) Å; c = 8.038(1) Å. The hexapyranose ring of 3 adopts a twisted boat according to the Cremer and Pople puckering parameters (Cremer and Pople, J Am Chem Soc 97:1354, 1975) whereas the structure determination of the corresponding deprotected intermediate 4 (orthorombic colorless prisms, P2 1 2 1 2 1 space group, a = 4.927(3) Å; b = 13.423(2) Å; c = 22.744(3) Å) has revealed a quasi perfect chair.
Index Abstract
We report herein the synthesis and the X-ray crystal structure of 2-azido-2-deoxy-3,4-O-isopropylidene-α-d-galactopyranosyl-N-oxyphthalimide 3 which is the key-precursor of a cancer-related STn antigen analogue 5.
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This work was supported by the Centre National pour la Recherche Scientifique (CNRS), Université Joseph Fourier (UJF) and the COST Action D-34.
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Renaudet, O., Philouze, C., Bailly, C. et al. X-Ray Structure of the Key Synthetic Intermediate of a Cancer-Related Sialyl-Tn Antigen Analogue. J Chem Crystallogr 41, 204–208 (2011). https://doi.org/10.1007/s10870-010-9864-x
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DOI: https://doi.org/10.1007/s10870-010-9864-x