4-Nitrobenzaldehyde → 2-((4-Nitrophenyl)methylene]-3-oxobutanoic acid 2-cyanoethyl ester

Participants

Reaction Steps

A suspension of 4-nitrobenzaldehyde (10.00 g, 66.2 mol), 2-cyanoethyl acetoacetate (10.27 g, 66.2 mol), piperidine (281 mg, 3.31 mmol) and acetic acid (198 mg, 3.31 mmol) in 250 ml of 2-propanol was stirred at room temperature for 48 hrs. Reaction mixture was filtered, the solid collected and dried in air to give 2-[(4-nitrophenyl)methylene]-3-oxobutanoic acid 2-cyanoethyl ester as a white powder (11.24 g, 59%).

Provenance & Evidence