Synthesis of curcumin β-maltooligosaccharides through biocatalytic glycosylation with Strophanthus gratus cell culture and cyclodextrin glucanotransferase
A two step synthesis of a series of curcumin β-maltooligosaccharides through sequential biocatalytic glycosylation using Strophanthusgratuscellculture and cyclodextrin glucanotransferase (CGTase) is reported. Cultured plant cells of S. gratus converted exogenously added curcumin into unnatural curcumin β-d-glucoside. Furthermore, four unnatural β-maltooligosaccharides, that is, α-Glc-1→(4-α-Glc
Condensation of glycosylated arylaldehyde with acetylacetone-B(2)O(3) complex gave a corresponding diglycosylcurcuminoid, and a similar reaction using a mixture of arylaldehyde and glycosylarylaldehyde gave an unsymmetrical monoglycosylcurcuminoid, both as boron-complexes. The boron was removed from the complexes by heating in methanol, thus achieving the synthesis of di- and mono-glycosylcurcuminoids
A one-pot multienzyme cofactors recycling (OPME-CR) system was designed for the synthesis of UDP-α-d-galactose, which was combined with LgtB, a β-(1,4) galactosyltransferase from Neisseria meningitidis, to modify various polyphenol glycosides. This system recycles one mole of ADP and one mole of UDP to regenerate one mole of UDP-α-d-galactose by consuming two moles of acetylphosphate and one mole of