We have developed a new method for the synthesis of carbamates from amine and hydrazine formate. The reaction occurs in the presence of iodine and tert-butyl hydroperoxide, in which carbazates are produced via alkoxycarbonyl radical formation for cross-coupling reaction. The method exhibits broad functional group tolerance and affords a series of N-phenylcarbamates in moderate to good yields. Remarkably, our approach is metal free and utilizes cheap, readily available raw materials and relatively universal substrates.

中文翻译：

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无金属参与的C-N偶联反应合成N-苯基氨基甲酸酯

我们开发了一种由胺和甲酸肼合成氨基甲酸酯的新方法。该反应在碘和叔丁基过氧化氢存在下发生，通过烷氧基羰基自由基的交叉偶联反应生成肼基甲酸酯。该方法表现出广泛的官能团耐受性，并以中等至良好的产率提供一系列 N-苯基氨基甲酸酯。值得注意的是，我们的方法不含金属，并利用廉价、容易获得的原材料和相对通用的基材。