in benzene-d6 byproducts: (E)-2-propenylphenol, 2-allylphenol; under Ar or N2; by a react. of Ru-contg. compds. with excess of Broensted acid at 50°C; instant; NMR spectra monitoring;

in benzene-d6 byproducts: (E)-2-propenylphenol, 2-allylphenol; under Ar or N2; excess of HCl; at 50°C; instant; NMR spectra monitoring;