反应详情

28.0 g of 2,3-dichlorobenzaldehyde, 13.9 g of ammonium acetate, 13.9 ml of nitromethane and 120 ml of glacial acetic acid are refluxed for 2 hours. After cooling, the reaction mixture is poured onto ice and stirred for 30 minutes. The formed precipitate is then filtered off, washed with water and dried in vacuo to thus obtain the product in the form of slightly yellowish crystals, m.p. 89°-91° C. IR (CHCl3) in cm-1 : 1650 (C=C); 1530 and 1350 (NO2). NMR (CDCl3) in ppm: 7.2-7.7 (m, 4H); 8.50 (d, J=15 Hz, 1H).

1. temperatureAfter cooling
2. additionthe reaction mixture is poured onto ice
3. filtrationThe formed precipitate is then filtered off
4. washwashed with water
5. customdried in vacuo
6. customto thus obtain the product in the form of slightly yellowish crystals, m.p. 89°-91° C