Abstract
Previously unknown methyl 2,3-diacetamido-2,3-dideoxy-α- d-hexopyranosides having the gulo, allo, galacto, ido, and altro configurations, as well as 2,3-diacetamido-2,3-dideoxy- d-galactose, have been synthesised. 13C-N.m.r. data for all eight methyl 2,3-diacetamido-2,3-dideoxy-α- d-hexopyranosides and for three 2,3-diacetamido-2,3-dideoxy- d-hexoses having the gluco, manno, and galacto configurations are reported. The regularity of changes in the spectra of 2,3-diacetamido sugars, as compared with those of the parent hexoses, and the calculation of 13C-n.m.r. spectra of their derivatives, using a method of additive corrections, are discussed.
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