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An X-ray crystallographic study has confirmed that the potassium bisulfite adducts of d-glucose and d-mannose have open-chain structures with R and S configurations respectively at C-1. NMR studies have shown that each sugar gives rise to two bisulfite compounds, and solution-state structures and conformations of these isomers have been deduced from analysis of 1 H NMR spectra. 13...
A procedure for preparing allyl 4,6-O-benzylidene-N-phthaloyl-muramic acid methyl ester is described. Depending on the reaction conditions, a partial cleavage of the phthaloyl group and formation of the tricyclic allyl 4,6-O-benzylidene-muramic acid 1',2-lactam also occurred; a successful route to the latter was via de-esterification (LiI) of the protected muramic acid ester group, dephthaloylation...
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