Synthesis of a library of fucopyranosyl-galactopyranosides consisting of a complete set of anomeric configurations and linkage positions.
A library composed of a complete set of fucopyranosyl-galactopyranosides was synthesized. A perbenzylated phenylthio fucopyranoside and a series of tri-O-benzyl-galactopyranosyl fluorides having single hydroxyl groups at the 2-, 3-, 4-, and 6-positions were used as the glycosyl donor and glycosyl acceptors, respectively. The chosen set of functionalities at the anomeric centers enabled rapid access to the oligosaccharides based on chemoselective activation. The first coupling reaction was achieved by the action of dimethyl(methylthio)sulfonium trifluoromethanesulfonate (DMTST). The resulting disaccharide fluoride was readily activated by hafnocene bistrifluoromethanesulfonate [Cp2Hf(OTf)2] and glycosidated with n-octanol.
Ohtsuka
Isao
I
Mitsubishi Kagaku Institute of Life Sciences (MITILS), 11 Minamiooya, Machida-shi, Tokyo 194-8511, Japan.
Ako
Takuro
T
Kato
Rumiko
R
Daikoku
Shusaku
S
Koroghi
Satomi
S
Kanemitsu
Takuya
T
Kanie
Osamu
O
D002236:Carbohydrate Conformation; D004187:Disaccharides / Q000138:chemical synthesis* / Q000737:chemistry; D005643:Fucose / Q000031:analogs & derivatives; D005697:Galactosides / Q000138:chemical synthesis; D013237:Stereoisomerism; D013865:Thioglycosides / Q000737:chemistry
D004187:Disaccharides; D005697:Galactosides; D013865:Thioglycosides; D005643:Fucose