苯并咪唑合成的后处理，跪求大神？有文献吗？ 3.3 mmol quinaldic acid (1), 1.5 mmol 3,3′-diamino- diphenylamine (2) and 25 mL polyphosphoric acid (PPA) were added into a round bottom flask, stirring 48 h at 170 °C under the atmosphere of N2. After the reaction was stopped and cooled to room temperature, the dark green mixture was obtained by adding water and regulating pH to the range of 9–10 with sodium hydroxide. Then, the product was purified by column chromatography on silica gel with gradient eluents of petroleum ether and ethyl acetate查看更多
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