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Conformational and configurational studies on diastereoisomeric methyl (methyl 3,4-O-benzylidene-α- and -β-D-galactopyranosid)uronates

C. Peciar, R. Palovčík, J. Alföldi, T. Sticzay, and P. Kováč

 

Abstract: Proton magnetic resonance and circular dichroism spectra for two pairs of diastereoisomeric methyl (methyl 3,4-O-benzylidene-a- and -ß-D-galactopyranosid)uronates and carbon magnetic resonance spectra for the dia­stereoisomeric title a anomers were measured. From the p.m.r. coupling constants, chemical shifts, and Cotton effects conformation and configura­tion for the compounds under investigation was determined. The possibility of the deformation of the tetrahydropyran ring containing a dioxolane fused ring is also discussed.

Full paper in Portable Document Format: 293a397.pdf

 

Chemical Papers 29 (3) 397–401 (1975)

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