Diphenyl carbonate → Oxalic acid, diphenyl ester

Participants

Reaction Steps

400 parts of an aqueous solution of sodium hydrogencarbonate having a pH of 8 were added to 200 parts of diphenyl carbonate, obtained through the decarbonylation reaction of diphenyl oxalate using tetraphenyl phosphonium chloride as a catalyst, and the mixture was heated to 90° C. and stirred for 1 hour. The obtained heavy solution (diphenyl carbonate layer) was purified by distillation in the same manner as in Example 3 at an yield of 85% to obtain diphenyl carbonate containing 0.8 ppm of hydrolyzable chlorine.

Provenance & Evidence