An efficient general strategy was developed for the synthesis of previously unknown
3-C-linked glycosyl iminocoumarins. The strategy involves a copper-catalyzed multicomponent
reaction of sugar-derived alkynes with tosyl azide and salicylaldehyde to give a diverse
array of glycosyl iminocoumarins in good yields. These compounds can serve as appropriate
precursors for the synthesis of the corresponding coumarin 3-C-glycosides.
Key words
multicomponent reactions - copper - alkynes - azides - glycosides - glycosylations
- heterocycles