Table 1. Effect of Sulfonylating Agent^a.

entry	sulfonylating agent	yield (%)b	β/α ratioc
1	4a	27	β only
2	4b	29	β only
3	4c	29	β only
4	4d	36	β only
5	4e	27	β only
6	4f	36	β only
7	4g	29	β only
8	4h	18	β only
9	4i	46	β only
10	4j	15	β only
11	4k	17	β only

^a0.20 mmol of glucosyl donor 1, 0.13 mmol of acceptor 2, 0.20 mmol of TTBP, 0.20 mmol of sulfonylating agent, THF as the solvent, 2 h of activation time. Glycosylation [1] = 0.050 M.

^bIsolated yield.

^cAll selectivities based on ¹H NMR analysis of purified material (see SI). TTBP = 2,4,6-tri-tert-butylpyrimidine.