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用过量的氯乙酸或氯乙醇,反应的pH值控制为9~10,可将硝基苯氧乙酸的产率从50%~60%提高到85%~92%,1,4-二羟乙基苯二醚的产率可达80%。
With an excess of chloroacetic acid or chloroethanol, the pH of the reaction is controlled to 9 to 10, the yield of nitrophenoxyacetic acid is increased from 50% to 60% to 85% to 92%, and 1,4-dihydroxyethyl The yield of benzophenone can reach 80%.