Diphosgene → 4-(4-Fluorophenylmethoxy)-2-fluorophenyl isocyanate

Participants

Reaction Steps

To a solution of 6.50 g (0.0276 mole) of 4-fluorophenylmethyl 4-amino-3-fluorophenyl ether in toluene, stirring at room temperature, was slowly added 3.95 g (0.020 mole) of trichloromethyl chloroformate. During the addition a thick precipitate formed. Upon completion of addition, the reaction mixture was stirred for one hour at room temperature and then at reflux for approximately seventeen hours. The toluene was removed by distillation, leaving 7.10 g of 4-(4-fluorophenylmethoxy)-2-fluorophenyl isocyanate.

Provenance & Evidence