A Convenient Method for Conversion of Flavonols into Anthocyanins
Reduction of rutin by zinc amalgam in 3percent absolute methanolic hydrochloric acid provides pure 3-O-β-D-(6''-O-α-L-(6'''-deoxy-mannosyl))glucopyranosyl-cyanidin in good yield.
Elhabiri, Mourad,Figueiredo, Paulo,Fougerousse, Andre,Brouillard, Raymond