A novel multienzymatic approach for the preparation of complex carbohydrates by enzymic aldolization is presented in which both the aldol donor and acceptor components are generated in situ by air oxidation using microbial oxidases. The L-threo stereochemistry generated by the recombinant rhamnulose 1-phosphate aldolase has been established by X-ray structural analysis.
A direct and highly convenient organocatalytic method for the preparation of 1,5-dialdo-pyranosides and 1,4-dialdo-furanosides is presented. The method relies on the chemoselective properties of TEMPO in combination with trichloroisocyanuric acid under very mild, basic conditions. Unprotected glycosides are prepared in a single step in high yields and are efficiently purified with the use of solid-phase
Functional sugar substitutes with reduced calories
申请人:THE PROCTER & GAMBLE COMPANY
公开号:EP0341062A2
公开(公告)日:1989-11-08
Disclosed are novel 5-C-hydroxymethylhexose compounds and their derivatives which exhibit sugar-like functionality when used in food compositions. The derivatives include stereoisomers, di-, tri-, and polysaccharides, alkyl glycosides, polyol, and alditol derivatives. Also disclosed are sugar substitute compositions and food compositions containing these compounds and their derivatives.
Process for preparing 5-C-hydroxymethyl aldohexose-based compounds
申请人:THE PROCTER & GAMBLE COMPANY
公开号:EP0341063A2
公开(公告)日:1989-11-08
Processes of the present invention provide economical methods for preparing derivatives 5-C-hydroxymethyl-D-aldohexose and their bicyclic anhydro tautomeric forms. The 5-C-hydroxymethylation process comprises an enzymic oxidation reaction followed by a condensation reaction with formaldehyde.