Glycosyl oxides, base-catalyzed addition

Base-catalyzed addition of glycosyl oxides for anomeric O-activation has been extended meanwhile to trifluoroacetonitrile (see Scheme 9), to dichlor-oacetonitrile, to l-aryl-l,l-dichloroacetonitriles, and to ketene imines (46,51,52). Also 2-(glycosyloxy)-pyridine and -pyrimidine derivatives were readily prepared from the corresponding 2-halo precursors (78). However,... 

---