Regioselective reduction of the homoisoflavone system with dialkylboranes in the presence of palladium catalysts

Article abstract of DOI:10.1246/bcsj.71.2923

(E)-3-Benzylidene-4-chromanones were regioselectively reduced to 3- benzyl-4-chromanones through the 1,4-addition of dialkylboranes, especially 9-borabicyclo[3.3.1]nonane, in excellent yields. The reaction was efficiently promoted by some palladium cataly