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卤素或硝基取代的芳醚类是有效的除草剂。我们利用相转移催化法依下列反应合成了苯基2·4—二硝基苯基醚(Ⅰ)和α—萘基2·4—二硝基苯基醚(Ⅱ)。应用相转移催化法合成(Ⅰ)和(Ⅱ)与文献所述的方法相比,不仅降低了反应温度而且提高收率10％以上。制得的化合物熔点与文献值符合,见表1,而且红外分析证实了(Ⅰ)和(Ⅱ)的结构,见表2和图1、2。
Halogen- or nitro-substituted aryl ethers are effective herbicides. We use the phase transfer catalysis to synthesize phenyl 2,4-dinitrophenyl ether (Ⅰ) and α-naphthyl 2,4-dinitrophenyl ether (Ⅱ) according to the following reaction. Compared with the method described in the literature, the synthesis of (I) and (II) by phase transfer catalysis not only reduces the reaction temperature but also increases the yield by more than 10%. The melting points of the compounds obtained are in accordance with the literature values, as shown in Table 1, and the structures of (I) and (II) are confirmed by infrared analysis, as shown in Table 2 and Figs.