Table 3.

Glycosylation of 1 and diol-type glycosyl acceptors 2j–n promoted by ZrO₂/SO₄ in scCO₂ with or without MW irradiation.

Entry	Acceptor 2	MW (W)	Monoglycosylated product 3	Yield of 3 [1st, 2nd] (%)	Yield of diglycosylated product 4 (%)
19		0		6 [7,4]	n. d.
20	2j	200	3j	5 [4,6]	n. d.
21		0		14 [8,19]	n. d.
22	2k	200	3k	19 [10,28]	n. d.
25		0		20 [19,21]	n. d.
26	2l	200	3l	17 [16,18]	n. d.
27		0		12 [12,12]	4ma,b 12 [11,12]
28	2m	200	3m	30 [33,26]	4ma,b
29		0		17 [14,20]	18 [16,20] 4na,b
30	2n	200	3n	21 [23,19]	17 [15,18] 4na,b 14 [10,17]

^aStructure of diglycosylated product 4m and 4n.

^bThe yields of 4m and 4n were calculated as one half molar equivalent of the glycosyl donor 1 was 100%.