1: With silver trifluoromethanesulfonate in dichloromethane; toluene T=10 - 20°C; Koenigs-Knorr glycosylation; 3.5 h; Molecular sieveDarkness; 2: With sodium methylate in methanol T=0 - 20°C; 4 h; Inert atmosphere; optical yield given as percent deFurther stages;