氧氮环丙烷是一种有机分子，含有氧，氮，碳的3 -元杂环。氧氮环丙烷的衍生物通常作为各种不同氧化反应的试剂，其中包括α-羟基化反应的烯醇化物，环氧化烯烃的氮杂环丙烷，和其他杂原子的转移反应。氧氮环丙烷也可以合成有用的中间物来进行酰胺的重组反应，以及与各种的累积多烯化合物进行[3 +2]环加成反应，取代五种重组的杂环。另外也开发出具有掌性的氧氮环丙烷衍生物，可以影响非对称性的氧原子转移到没有掌性的烯醇类化合物，另一些的氧氮环丙烷可以使原本很难反转的氮原子，能够在氮原子上产生掌性的特色。

An oxaziridine is an organic molecule that features a three-membered heterocycle containing oxygen, nitrogen, and carbon. In their largest application, oxazidines are intermediates in the industrial production of hydrazine. Oxaziridine derivatives are also used as specialized reagents in organic chemistry for a variety of oxidations, including alpha hydroxylation of enolates, epoxidation and aziridination of olefins, and other heteroatom transfer reactions. Oxaziridines also serve as precursors to amides and participate in [3+2] cycloadditions with various heterocumulenes to form substituted five-membered heterocycles. Chiral oxaziridine derivatives effect asymmetric oxygen transfer to prochiral enolates as well as other substrates. Some oxaziridines also have the property of a high barrier to inversion of the nitrogen, allowing for the possibility of chirality at the nitrogen center.