An efficient synthesis of cyclodextrin-based carbohydrate cluster compounds

The photoaddition of the thiol 2,3,4,6-tetra-O-acetyl-beta-D-1-thioglucopyr anose to the allyl ether functions of per-2-allyl-, per-6-allyl-, and per-2 ,6 diallyl-beta-cyclodextrin derivatives provides a remarkably simple and e fficient way for attaching glucopyranose units onto (1) the secondary face, as well as (2) the primary face, of beta-cyclodextrin-not to mention (3) b oth the primary and secondary faces, simultaneously-in yields of up to 70%.