Zn-induced allylation of chromone-3-carbaldehyde 1 produces 3-(1-hydroxy-3-butene-1-yl)chromone 2, which gives back 1 on treatment with formalin under acidic conditions, and reacts differently towards nitrogenous nucleophiles.
Optically active uracil and chromen-4-one substituted homoallylic alcohols were obtained from the corresponding racemic alcohols by Pseudomonas cepacia lipase catalyzed transesterification in high enantiomeric ratio (E) under mild reaction conditions.