可见光诱导的有机反应因具有反应条件温和、较高的反应效率和新颖的反应类型等优点而备受有机化学家们的关注。有机氮氧化物因其N–O键结构特性和高的化学活性，在有机反应中表现出了与众不同的反应特性，它们是一类合成含氮、氧化合物的重要合成子。本文围绕可见光诱导有机氮氧化物的反应展开研究，取得了如下研究成果： 建立了一种有效的可见光诱导N (芳乙酰氧)邻苯二甲酰亚胺与芳基羧酸的脱羧偶合合成1,2-二芳基乙酮的新方法。反应经历了可见光诱导N (芳乙酰氧)邻苯二甲酰亚胺的N–O键断裂脱羧形成芳甲基自由基、三苯基膦辅助芳基羧酸脱氧形成酰基自由基和双自由基的偶合过程。这种方法具有底物范围广、反应条件温和、操作简便以及产物的多样性丰富等优点，为1,2-二芳基乙酮化合物的合成提供了一条新途径。建立了一种高效的可见光诱导含O-(2,4-二硝基苯基)酮肟基酚衍生物去芳构化合成螺吡咯啉的新方法。机理研究显示，首先1,8-二氮杂二环十一碳-7-烯(DBU)与底物中2,4-二硝基苯基形成了电子供体-受体(EDA)复合物，然后在可见光作用下经过N–O键断裂形成氮自由基，随后发生酚衍生物分子内去芳构化而得到螺吡咯啉。该方法具有如下优点：没有额外光催化剂的加入、容易制备的起始原料、简单且温和的反应条件、广泛的底物范围和好的官能团容忍性。发展了一种有效的可见光诱导碳酸肟酯对烯烃的氧亚胺化合成2-胺基-1-醇衍生物的新方法。反应通过能量转移过程发生了碳酸肟酯N–O键的均裂同时产生O和N两种自由基，然后对烯烃发生1,2-加成。该方法具有区域选择性高、底物范围广、反应条件温和以及官能团容忍性好等优点，为2-胺基-1-醇衍生物的合成提供了一种有效的新方法。

Visible-light induced reactions have attracted much attention for their mild conditions, higher reaction efficiency, and novel reaction types. The organic oxynitrides are one kind of important building blocks for their unique structural characteristics and high activation of N–O bonds, and they exhibit different reactivity from other organic compounds. In this dissertation, visible-light induced reactions of organic oxynitrides were investigated, and some important results were achieved as follows: A new method for the synthesis of 1,2-diarylethanones has been developed via visible-light induced decarboxylative couplings of N-(arylacetoxy)phthalimide derivatives and aryl carboxylic acids. The reactions underwent the decarboxylation of N-(arylacetoxy)phthalimide derivative providing arylmethyl radical via cleavage of the N–O bond, triphenylphosphine-mediated deoxidation of aryl carboxylic acid giving substituted benzoyl radical and cross-coupling between the two radicals. The present method shows some advantages including wide substrate scope, mild conditions, simple operation and diverse products, and it provides a new route for synthesis of 1,2-diarylethanones.A novel method for the synthesis of spiropyrrolines has been developed via visible-light induced dearomatization of phenol derivatives containing O-(2,4-dinitrophenyl)oximes. The mechanism investigations showed that the electron-donor acceptor (EDA) complex between 2,4-dinitrophenyl in the substrates and 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) acted as the visible- light photosensitizer, and then cleavage of the N–O bonds in the substrates and subsequent dearomatization of phenol derivatives provided the spiropyrrolines. The present method affords some advantages such as the readily available substrates, mild and simple conditions, wide substrate scope and good tolerance of functional groups.A new method for the synthesis of 2-amino-1-ol derivatives has been developed via visible-light induced homolysis of the N–O bonds in oxime carbonates and subsequent 1,2-oxyimination of alkenes. During the reactions, both oxygen and nitrogen radicals were first formed through N–O bond homolysis of the oxime carbonate by an energy transfer process, and then 1,2-addition of the two radicals to alkenes provided the target products. The present method exhibits some merits including applicability of universal substrates, mild reaction conditions and excellent functional group tolerance.