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N-(p-甲苯基)-N＇-(α,α—二甲基苄基)脲的商品名为莎扑隆(Cyperon)或K-223,是一种优良的除草剂,目前国内正在研制。为了有效地进行K-223及其主要中间产品p-甲苯脲的工艺研究,我们开展了对这两种化合物分析方法的探索。由于K-223及p-甲苯脲均为芳烃衍生物,具有特征紫外吸收光谱,但二者最大吸收波长相近,对测定互相干扰,必须在测定前将二者分离。本文介绍薄层色谱(TLC)分离K-223和p-甲苯脲的条件以及用紫外光度法进行测定的方法。
The trade name of N- (p-tolyl) -N ’- (α, α-dimethylbenzyl) urea is Cyperon or K-223 which is an excellent herbicide. At present, Development. In order to effectively carry out the process of K-223 and its main intermediary product p-toluamide, we conducted an exploration of these two compound analysis methods. Since both K-223 and p-toluidine are aromatic derivatives, which have characteristic UV absorption spectra, the maximum absorption wavelengths of both are close and interfere with each other determination. They must be separated before the measurement. This article describes the conditions for the thin-layer chromatography (TLC) separation of K-223 and p-toluamide and the determination by UV spectrophotometry.