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在碱金属亚硝酸盐和碳酸盐存在下,被强吸电子基团取代的硝基苯在非质子极性溶剂中能发生自身缩合反应,生成结构对称的双取代二苯醚,收率较高。此类反应的主要历程属于S_NA_r,但同时也存在着S_(RN)A_r(SET)历程作为次要途径。
In the presence of alkali metal nitrite and carbonate, nitrobenzene substituted by a strongly electron-withdrawing group can undergo self-condensation reaction in aprotic polar solvents to form a symmetrically substituted disubstituted diphenyl ether with a yield of high. The main course of such reactions belongs to S_NA_r, but there is also a history of S_ (RN) A_r (SET) as the secondary path.