Syntheses of deoxy analogues of methyl 3,6-di-O-alpha-D-mannopyranosyl-alpha-D-mannopyranoside for studies of the binding site of concanavalin A.
Carbohydr Res
; 278(2): 271-87, 1995 Dec 20.
Article
in En
| MEDLINE
| ID: mdl-8590445
ABSTRACT
All of the monodeoxy analogues of methyl 3,6-di-O-alpha-D-mannopyranosyl-alpha-D-mannopyranoside have been synthesized together with two dideoxy (2,3'- and 4,3'-) analogues. The 2'- and 2"-deoxy functions were introduced by NIS-promoted couplings with 2,3,4-tri-O-acetyl-D-glucal as donor, followed by reduction of the resulting 2'- and 2"-iodo derivatives, whereas the 3'-, 3"-, 4'-, 4"-, 6'-, and 6"-deoxy functions were introduced by using known deoxyglycosyl chlorides as donors in coupling reactions promoted by silver trifluoromethanesulfonate. The 2- and 4-deoxy functions on the central mannose residue were introduced by displacement, using triiodoimidazole and triphenylphosphine, of a hydroxyl group by iodine on suitably protected derivatives followed by reduction of the resulting iodo analogues.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Trisaccharides
/
Deoxy Sugars
/
Concanavalin A
/
Disaccharides
Language:
En
Journal:
Carbohydr Res
Year:
1995
Document type:
Article
Affiliation country:
Suecia