A novel straightforward approach to 3-(arylideneamino)hydantoins has been developed. It is based on the reaction of readily available 4-(tosylmethyl)semicarbazones with NaCN in DMF followed by heating of the obtained 4-(cyanomethyl)semicarbazones with concd HCl.

中文翻译：

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3-（芳基亚氨基）乙内酰脲的一种新的直接方法

已经开发了新颖的3-（芳基亚氨基）乙内酰脲的简单方法。其基于容易获得的4-（甲苯磺酰基甲基）半咔唑酮与NaCN在DMF中的反应，然后将得到的4-（氰甲基甲基）半咔唑酮与浓HCl加热。