Synthesis of the oligosaccharide domain of acarbose was reinvestigated and was optimally performed using a maltosidic acceptor, already bearing a alpha-D-Glc-(1-->4)-D-Glc bond, and a new D-fucopyranosyl donor. The crucial glycosylation step was improved by varying three different parameters and notably by focusing on the C-4 protecting group of the fucosyl residue, solvent and promoter. The resulting
Synthesis of the oligosaccharides α-d-Glcp(1→4)-d-Xylp, α-d-Xylp-(1→4)-d-Glcp, α-d-Glcp-(1→4)-α-d-Glcp-(1→4)-d-Xylp, α-d-Glcp-(1→4)-α-d-Xylp-(1→4)-d-Glcp, and α-d-Xylp-(1→4)-α-d-Glcp-(1→4)-d-Glcp
Syntheses are described of the disaccharides, alpha-D-Glcp-( -->4) -D-Xylp, alpha-D-Xylp-(1 --> 4)-D-Glcp, and alpha-D-Xylp-(1 --> 4)-D-Xylp, and trisaccharides, alpha-D-Glcp-(1 --> 4)-alpha-D-Glcp-(1 --> 4)-D-Xylp, alpha-D-Glcp-( --> 4)-alpha-D-Xylp-(1 --> 4)-D-Gep, and alpha-D-Xylp-(1 --> 4)-alpha-D-Glcp-(1 --> 4)-D-Glcp as analogues of glucoamylase and soybean beta-amylases substrates.
TAKEO, KENICHI;TERAMOTO, YASUHIRO;SHIMONO, YUMI;NITTA, YASUNORI, CARBOHYDR. RES., 209,(1991) C. 167-179