Table 1.

Procedures and results concerning diosgenin glycosylation.

Entry	Procedure	Glycosyl donor	Solvent	Promoter	Product	Yield (%)
1	normal	2a (α)	CH2Cl2/Et2O	AgOTf	6a	30
2	reverse	2a (α)	CH2Cl2/Et2O	AgOTf	6a	77
3	reverse	2a (α)	CH2Cl2	AgOTf	―	―
4	reverse	2b (α)	CH2Cl2/Et2O	AgOTf	6b	98
5	normal	2c (α + β)	CH2Cl2/Et2O	AgOTf	6c	51
6	reverse	2c (α + β)	CH2Cl2/Et2O	AgOTf	6c	55
7	reverse	2c (α + β)	CH2Cl2	AgOTf	6c	90
8	normal	2d (α + β)	CH2Cl2/Et2O	AgOTf	6d	73
9	reverse	2d (α + β)	CH2Cl2	AgOTf	6d	93
10	reverse	3a (α)	CH2Cl2/Et2O	AgOTf	6a	69
11	reverse	3b (α)	CH2Cl2/Et2O	AgOTf	6b	86
12	reverse	3c (β)	CH2Cl2	AgOTf	6c	99
13	reverse	3d (β)	CH2Cl2	AgOTf	6d	87
14	normal	5a (α + β)	CH2Cl2	TMSOTf	6a	85
15	normal	5b (α + β)	CH2Cl2	TMSOTf	6b	81
16	normal	5c (β)	CH2Cl2	TMSOTf	6c	83
17	normal	5d (β)	CH2Cl2	TMSOTf	6d	52