T=740°C; P=0.1 Torr; 0.25 h;

1: 72.5 percent / magnesium sulfate, potassium permanganate / H2O / 0.5 h / 6 °C 2: 63 percent / pyridine, methanesulfonyl chloride / 1.) RT, overnight, 2.) reflux, 4 h View Scheme

toluene-4-sulfonic acid in benzene Heating;

toluene-4-sulfonic acid in benzene 16 h; Heating; Yields of byproduct given;