Table 1.

Stereoselective glycosylations between donor 17 and various acceptors

Entry	ROH	Product	Yield[b]	α:p[c]
1		29	91%	>15:1
	24
2		30	62%	>25:1
	25
3		31	89%	α only
	26
4		32	67%	>15:1
	27
5		33	72%	α only
	28

^a1,3,5-Trimethoxybenzene, Tf₂O, DTBMP, molecular sieves 4 Å, −10 °C, 30 min, then add acceptor, −40 °C to room temperature, 16 h.

^bIsolated yields of the α/β mixture of disaccharide products.

^cThe α/β ratios were determined by the integration of key signals in the ¹H NMR spectra of the disaccharide products after purification by LH-20 size exclusion chromatography.