toluene-4-sulfonic acid; hydroquinone 1.) 150 deg C, 24 h, 2.) benzene, reflux, 0.5 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

toluene-4-sulfonic acid; hydroquinone 1.) 150 deg C, 24 h, 2.) benzene, reflux, 0.5 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;