Table 3.

Coupling of various glycosyl acceptors to C(2)-N-benzylidene substituted glucosamine donor 5.

Entry	Acceptors	Products	Yieldd (α:βe)
1a			85%, 15:1
2b			93%, α-only
3a			90%, 11:1
4a			76%, α-only 71%, α-onlyf
5c			58%, α-only

^aDonor/Acceptor = 1:1.2.

^bDonor/Acceptor = 1:2.

^cDonor/Acceptor = 2:1.

^dIsolated by chromatography.

^eCalculated based on ¹H NMR.

^fConducted with 15 mol % commercially available Ni(OTf)₂ for 16 h.