Abstract
Reaction of 5-arylidene-2-thiohydantoins 3a-d with glycosyl halides 4a,b under alkaline conditions gave the respective bisglycosylated derivatives 5a-h. Deacetylation with ammonia in methanol caused a change of the S-glycosyl residue and gave the N-3 glycosylated analogues 7a-h. S-Glycosylation also occured when N-3 substituted hydantoins 9a-h were reacted.