Os. Yuzikhin et al., Oxidation of aromatic compounds: VIII. Oxidative dehydrodimerization of cinnamic acid derivatives in the system CF3COOH-CH2Cl2-PbO2, RUSS J ORG, 36(12), 2000, pp. 1743-1754
Regioselective oxidative dehydrodimerization of the E isomers of alkoxy-, a
lkyl-, and halogen-substituted cinnamic acids in the system CF3COOH-CH2Cl2-
PbO2 leads to formation of bis-lactones of the furo[3,4-c]furan series with
similar steric structures, regardless of the substituents in the aryl frag
ments of the initial acids.