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通常用以制备醛、酮衍生物的2,4-二硝基苯肼的酸性(H_2SO_4)乙醇溶液,与三苯甲醇在水浴上加热一刻鐘后,得到其縮合产物——α-[2,4-二硝基苯]-β-[三苯甲基]-肼(Ⅲ),产率70％,熔点167.5°(自乙醇-乙酸乙酯中)。
The acidic (H 2 SO 4) ethanol solution of 2,4-dinitrophenylhydrazine, which is usually used to prepare aldehyde and ketone derivatives, is heated with trityl alcohol in a water bath for one quarter of an hour to obtain the condensation product of α - [2, Dinitrobenzene] -β- [trityl] -hydrazine (III) in 70% yield, m.p. 167.5 ° (from ethanol-ethyl acetate).