A-D-Glucose, and

Chiral nitrogen chelates derived from sugars were prepared by Ruffo [48], introducing diimines and diamines functionalities on inexpensive monoses, a-D-glucose and a-D-mannose. 

The regioselective esterification at position 6 of a-D-glucose and a-D-glucopyrano-sides with fatty acids [81] is readily achieved by use of Novozym 435, in accordance with Scheme 8.56. 

Preparation of 1,2-Anhydro-tri-O-Benzyl-a-D-Glucose and General Method for Its Use as a Glycosyl Donor in the Formation of fi-Glycosides... 

The result, [a] D -f-110° with an error of not more than + 2°, showed that prior to mutarotation the D-glucose was the ordinary a-form of rotation approximately - -109°, now known as a-D-glucopyranose. Sucrose, then, was an a-D-glucoside. Inspection of Fig. 1 also shows that after inversion but before mutarotation the sum of the rotations contributed by the a-D-glucose and the D-fructose remained very close to the specific rotation of 66° possessed by the original sucrose. The relationship ... 

Q2H22O11 + h2o c6h12o6 + c6h12o6 Sucrose, known as table sugar, is comprised of a-D-glucose and j8-D-fructose. The aldehyde group ( carbon) of glucose is linked... 

Some monosaccharides may also be classified as being epimers. Epimers are compounds that have identical configurations except for one carbon atom. For example, a-D-glucose and a-D-fructose are epimers. Epimers sometimes react with the same reagent to form the same product. For example, both a-D-glucose and a-D-fructose react with phenylhydrazine to form the same osazone. 

Thus, ignoring the small portions of furanose forms (-0.5% each), the mixture contains about 36% a-D-glucose and 64% /3-D-glucose. 

Sucrose (cane sugar) is a disaccharide in which the glycosidic link involves the anomer C-l of a-D-glucose and the anomeric C-2 of fructose. Sucrose (a-D-glucopyranosyl(l —> 2) (3-D-fruc.tofuranoside a-D-Glc(l —> 2) (3-D-Fru) does not have a reducing end because the reducing ends of both the constituent monosaccharides are involved in glycosidic bond formation (Section 4, Appendix). 

Sucrose is a disaccharide formed from a-D-glucose and fructose. 

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