Methanol → 1,1-Diphenylethylene

Participants

Reaction Steps

200.23 g of crude carbinol, 400 ml of toluene and 1 g of paratoluenesulfonic acid (PTSA) were weighed and put in a 1-liter reaction flask, and azeotropic dehydration was carried out under toluene refluxing (94°-116° C.) for 2 hours. The resulting product was washed with water after cooling, washed with a 2% aqueous solution of soda ash, washed with water, dried over magnesium sulfate, and concentrated to obtain 190.09 g of crude 1,1-diphenylethylene (9a, Ar=R=Ph). Crude 1,1-diphenylethylene (9a) was distilled in a Claisen flask equipped with a vigreux to obtain 174.06 g of 1,1-diphenyl-ethylene (9a).

Provenance & Evidence