Organosilicon-mediated regioselective acetylation of carbohydrates
作者:Yixuan Zhou、Olof Ramström、Hai Dong
DOI:10.1039/c2cc31556d
日期:——
Organosilicon-mediated, regioselective acetylation of vicinal- and 1,3-diols is presented. Methyl trimethoxysilane or dimethyl dimethoxysilane was first used to form cyclic 1,3,2-dioxasilolane or 1,3,2-dioxasilinane intermediates, and subsequent acetate-catalyzed monoacylation was efficiently performed by addition of acetic anhydride or acetyl chloride under mild conditions. The reaction exhibited
Preparation of two methyl deoxyfluoro-β-d-galactopyranosides, and their interaction with galactan-specific immunoglobulin A 1539 (fab′)
作者:Yitzhak Ittah、Cornelis P.J. Glaudemans
DOI:10.1016/s0008-6215(00)85575-5
日期:1981.9
Methyl 2-deoxy-2-fluoro-beta-D-glactopyranoside (2) and methyl 4-deoxy-4-fluoro-beta-D-glactopyranoside (7) have been prepared, and the possibility of their binding to (1 leads to 6)-beta-D-galactopyranan-specific immunoglobulin A J539 (Fab') has been investigated. Compound 2 does not show binding, whereas 7 does. It appears that the 2-hydroxyl group of methyl beta-D-galactopyranoside may take part in hydrogen bonding to the protein.