Yc. Chang et al., MICROWAVE-MEDIATED SYNTHESIS OF ANTICARCINOGENIC ISOFLAVONES FROM SOYBEANS, Journal of agricultural and food chemistry, 42(9), 1994, pp. 1869-1871
Soybean isoflavonoids, 7,4'-dihydroxyisoflavone (daidzein), 7-hydroxy-
4'-methoxyisoflavone (formononetin), 5,7,4'-trihydroxyisoflavone (geni
stein), and 5,7-dihydroxy-4'-methoxyisoflavone (biochanin A), were syn
thesized in high yields by cyclization of their corresponding ketones
in a conventional microwave oven.