中文摘要：

采用一种新的方法——氯甲酸甲酯法合成了新型植物生长调节剂N,N′-二苯基脲。该反应分两步进行,即在三正丁胺存在下,苯胺与氯甲酸甲酯加热回流生成苯胺基甲酸甲酯,后者不经分离再与过量苯胺继续反应,生成目标产物。第一步反应很快,回流30 min即可;通过正交试验得出第二步反应的最佳条件为：反应体系在120℃回流3.0 h,产物的产率为90.5%。采用IR、MS1、H NMR和13C NMR对其结构进行表征。以丰光萝卜种子为材料,采用萝卜子叶扩张生长法测定其促进细胞分裂的活性,结果表明：该化合物在0.01~1.00 mg.L-1浓度范围内能显著促进萝卜子叶生长,浓度为1.00 mg.L-1时活性最高。

英文摘要：

N, N＇-diphenylurea was synthesized by a novel and simple method. First, aniline reacts with methyl chloroformate in the presence of tri-n-butylamine; then the unseperated mixture then reacts with aniline to get final product. The first step was quick, and finished within 30 min of refluxing. The best re- action conditions of the second step was confirmed by the orthogonal experiment. Its yield was 90.5 when the reagents were refluxed for 3.0 h at 120℃. Its structure was elucidated by IR, MS, 1 H NMR and 13C NMR. Its biological activity of promoting Radish Fengguang Cell split was tested by the method of radish cotyledon stretching growth. The results showed that the synthesized compound promoted radish cotyledon growing effectively when its concentrations ranged from 0.01 mg · L-1to 1.00 mg· L-1. Further- more, it had the highest bioactivity at the concentration of 1.00 mg · L-1.