Carbodiimides are a unique class of heterocumulene compounds that display distinctive chemical properties. The rich chemistry of carbodiimides has drawn increasing attention from chemists in recent years and has made them exceedingly useful compounds in modern organic chemistry, especially in the synthesis of N-heterocycles. This review has outlined the extensive application of carbodiimides in the synthesis of N-heterocycles from the 1980s to today. A wide range of reactions for the synthesis of various types of N-heterocyclic systems (three-, four-, five-, six-, seven-, larger-membered and fused heterocycles) have been developed on the basis of carbodiimides and their derivatives.

中文翻译：

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基于碳二亚胺的N杂环合成：从两个经典的反应位转变为化学键断裂/形成反应。

碳二亚胺是一类独特的杂枯烯化合物，具有独特的化学性质。碳二亚胺的丰富化学方法近年来引起了化学家的越来越多的关注，并使它们在现代有机化学中，尤其是在N杂环的合成中极为有用。这篇综述概述了碳二亚胺从1980年代到今天在N-杂环的合成中的广泛应用。在碳二亚胺及其衍生物的基础上，已经开发了用于合成各种类型的N-杂环系统（三元，四元，五元，六元，七元，大元和稠合杂环）的各种反应。 。