| 摘要 |
Ortho- and para-nitro-anilines are made by (a) reaction of o- or p-chloro nitrobenzene with 1.05-2 parts by wt. cyanamide or one of its salts, e.g. calcium cyanamide, in aq. soln. in presence of a phase transference catalyst, e.g. triethyl benzyl ammonium chloride at ambient temp.; and (b) hydrolysis of the nitrophenyl cyanamide formed by treatment with sulphuric acid at pH 1 at the b.pt. of the mixt. for 3 h..
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