反应详情

2.0 g (8.22 mmol) of 4-nitronaphthalene-1,8-dicarboxylic anhydride and 2.68 g (9.04 mmol) of N-ethyl-N-(2-hydroxyethyl)-p-phenylenediamine sulfate monohydrate were stirred in 12 g of molten imidazole at 130° C. under an argon atmosphere for 1 hour. After cooling, the mixture was poured into 400 mL of 2 N hydrochloric acid and the precipitate was suction-filtered off, washed with water and dried. The resulting product was used in Step 2 without further purification.

1. temperatureAfter cooling
2. filtrationthe precipitate was suction-filtered off
3. washwashed with water
4. customdried
5. customThe resulting product was used in Step 2 without further purification