Ov. Singh et al., SYNTHESIS AND ANTICOMPLEMENTARY ACTIVITY OF 2-(2-ARYL-3-ALKOXYCHROMON-6-YL)PROPANOIC ACIDS, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 31(4), 1992, pp. 248-253
The title compounds have been synthesized from the corresponding 2-ary
l-3-alkoxy-6-propionylchromones by 1,2-migration of chromone ring usin
g hypervalent iodine reagents. Seven selected compounds have been foun
d to inhibit the in vitro immunohaemolysis of antibody coated sheep er
ythrocytes by guinea pig serum.