Diphosgene → Methyl 6-chloro-3-isocyanato-2-methylbenzoate

Participants

Reaction Steps

A solution of 14.7 grams (0.074 mole) of methyl 3-amino-6-chloro-2-methylbenzoate in 1000 mL of toluene was stirred and 14.6 grams (0.074 mole) of trichloromethyl chloroformate was added dropwise thereto. Upon completion of the addition, the reaction mixture was warmed to reflux where it stirred for about 18 hours. After this time the reaction mixture was concentrated under reduced pressure to a residue, which was assumed to be a theoretical yield (16.7 grams) of the subject compound. The subject compound was taken directly to the next reaction in the sequence.

Provenance & Evidence