Phenylurea → p-Nitrophenyl phenylcarbamoylcarbamate

Participants

Reaction Steps

To a stirred solution of 6.8 g. of phenylurea in 50 ml. of dry THF maintained at 0° C. under nitrogen were added 5.05 g. of p-nitrophenyl chloroformate. The reaction mixture was allowed to warm to room temperture and was stirred for about 18 hours. The mixture was evaporated to dryness and the residue dissolved in ethyl acetate. The solution was washed twice with water, twice with brine, and was filtered through sodium sulfate. The filtrate was evaporated to dryness to yield 4.9 g. of the product as a white product.

Provenance & Evidence