Phosgene → HCID 86740301, compound

Participants

Reaction Conditions

Reaction Steps

A three-liter, round-bottom flask was obtained and fitted with an overhead stirrer, a thermocouple, a temperature controller, an addition funnel with a cold trap overhead, and a line leading to a phosgene cyclinder. Also it was fitted with an exit line to a nitrogen/vacuum source, a heating mantle, and a catch basin. The exit line went to a condenser and a caustic scrubber. Into this flask was placed 183.2 g (0.67 mole) benzyloxyphenoxypropionic acid, 900 ml of toluene, and 2.9 g (0.04 mole) dimethylformamide. The phosgene cyclinder was turned on and 75 ml (1.05 moles) phosgene was allowed to accumulate in the funnel. The reactants were heated to 80° C. with stirring while the phosgene was added thereto. During the course of the phosgene addition, solids formed in the flask; however, ultimately they went into solution. After the phosgene addition, nitrogen was slowly added to the flask. The reaction was stopped, and a vacuum pulled on the flask to boil off the excess phosgene. The flask was then placed under a nitrogen atmosphere. The solvent was stripped off, leaving 233.2 g of yellow solids, which were identified by suitable analytical techniques as being the subject compound.

Provenance & Evidence