Preparation of 4-(2-nitrophenyl)but-3-en-2-one
2.85 g of o-nitrobenzaldehyde and 3.5 g of acetone are heated with 20 ml of 10% sodium hydroxide solution on a water bath for 1 hour. The crystals which separate on cooling are filtered off and recrystallized from a little alcohol. Yield 3 g. Colourless crystals; m.p. 60° C.
Systematic organic chemistry, by W. M. Cumming, 99, 1937.