The oxygenation of the potassium salt of flavonol (flaH) in absolute DMF leads to potassium O-benzoylsalicylate and carbon monoxide in 95% yield at 40° C. Kinetic measurements resulted in the rate law-d [flaK]/dt= k 2 [flaK][O2]. The rate constant, activation enthalpy, and entropy at 313.16 K are as follows: k 2/M-1 s-1=(3.28±0.10)× 10-1, Δ H⧧/kJ mol-1= 29±2, Δ S⧧/J mol-1 K-1=-161±6. The reaction fits a Hammett linear free energy relationship for 4'- ...
