4-Nitrobenzaldehyde → HCID 58674197, compound

Participants

Reaction Steps

7.84 g (38.4 mmol) N-[3-(trifluoromethyl)phenyl]urea, 5.81 g (38.4 mmol) 4-nitro-benzaldehyde, 5.0 g (38.4 mmol) ethyl 3-oxobutanoate and 15 g polyphosphoric acid ethyl ester are suspended in 100 ml of THF. The mixture is stirred at reflux for 18 hours. After cooling down to room temperature, the solvent is removed in vacuo and the residue is purified by column chromatography on silica with toluene/etiyl acetate as eluent.

Provenance & Evidence