Efficient synthesis of kaempferol 3,7-O-bisglycosides via successive glycosylation with glycosyl ortho-alkynylbenzoates and trifluoroacetimidates

Article abstract of DOI:10.1016/j.tetlet.2012.03.103

Selective glycosylation of the 3-OH of 5,4′-di-O-acetyl-kaempferol was achieved with glycosyl ortho-alkynylbenzoates as donors under the catalysis of Ph₃PAuNTf₂, and subsequent glycosylation of the remaining 7-OH with glycosyl triflu