Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS, Avenue de la Terrasse, 91198 Gif-sur-Yvette, France.
J Org Chem. 2010 Dec 17;75(24):8383-91. doi: 10.1021/jo101453y. Epub 2010 Nov 11.
α-C-Glucopyranosides and mannopyranosides are obtained in 65-85% yields from 4,6-O-benzylidene-protected glucosyl and mannosyl thioglycosides bearing ester functionality at the 3-O-position by a coupling reaction with C-nucleophiles on activation with diphenyl sulfoxide, 2,4,6-tri-tert-butylpyrimidine, and trifluoromethanesulfonic anhydride.
α-C-吡喃葡萄糖苷和α-D-吡喃甘露糖苷可以通过 4,6-O-苄叉保护的 3-O-位带有酯基的葡萄糖基和甘露糖基硫糖苷与 C-亲核试剂在二苯砜、2,4,6-三特丁基嘧啶和三氟甲磺酸酐的活化作用下发生偶联反应,以 65-85%的收率得到。