4-Nitroaniline → HCID 69202260, compound

Participants

Reaction Conditions

Reaction Steps

Into a dry 2 L round-bottom flask was placed 106.3 grams (0.506 moles) of 3-(3-fluorophenyl)-3-oxo-propionic acid ethyl ester, 63.0 grams (0.456 moles) of 4-nitro-aniline and 4.0 grams (0.023 moles) of 4-nitro-aniline hydrochloride. To the mixture was added 1.3 L of n-butanol, the flask was fitted with a Soxhlet extractor (cup volume of 0.3 L), condenser and nitrogen inlet. Dry, activated 4 Å sieves (200 grams) were placed in the extractor cup and the reaction mixture heated to reflux temperature of 118° C. under nitrogen and maintained at that temperature for 90 hours. The reaction mixture was decanted while hot from a small amount of solids and chilled to −15° C. for 48 hours Crystalline solids were collected by vacuum filtration. The crystals were washed with 0.2 L of cold ethanol and two 0.2 L portions of hexanes and vacuum dried at 50° C. overnight to yield 35.8 grams (20.8% yield) of the title compound.

Provenance & Evidence