反应详情

温度

120 °C

0.822 g (2 mmol) 2,3-dimethyl-1,3-bis-(3-sulfo-propyl)-3H-indolium sodium salt 7 and 0.65 g (2.5 mmol) malonaldehyde-bisphenylimine-hydrochloride are dissolved in a mixture of 10 ml acetic acid and 20 ml acetic anhydride and stirred at 120° C. for four hours. The solvent is removed in vacuum after cooling to room temperature. The residue is washed carefully with ethyl acetate. A dark brown solid is obtained which is processed without further purification.

1. customThe solvent is removed in vacuum
2. temperatureafter cooling to room temperature
3. washThe residue is washed carefully with ethyl acetate
4. customA dark brown solid is obtained which
5. customis processed without further purification