Phenyl isocyanate → HCID 1377176, compound

Participants

Reaction Steps

A solution of methyl carbazate (91.9 g, 1.02 moles) in 450 ml of benzene was added dropwise with stirring during 45 min. to phenyl isocyanate (122 g. 1.02 moles); a temperature rise to near 80° C. was observed. After addition of the ester solution the mixture was heated under reflux, with stirring, for 45 min. Stirring was continued at ambient temperature for 15 hr. Removal of volatiles under reduced pressure gave 210.6 g (99%) of product ester, as long prisms, m.p. 154°-155°. Recrystallization from isopropyl alcohol/ethanol (4/1) gave a polymorph as chunky crystals, m.p. 166°-168°.

Provenance & Evidence