有机光化学反应由于环境友好、操作简单、反应条件温和等优点备受关注，成为近年的研究热点之一。本项课题拟利用炔键易与自由基发生加成反应的特点，设计合成简单易得的有机小分子，通过研究其在不同反应条件下的光化学反应行为和反应机理, 开展新型有机光化学反应特别是串联反应的研究，主要内容包括：通过异氰基苯乙炔与苯甲酰基自由基发生分子间自由基加成关环实现多环结构吲哚类化合物的光化学合成；利用单电子转移反应形成含氮自由基与炔键发生加成、双键重排串联反应实现多取代吲哚类化合物的合成；利用氮杂环丙烷易发生开环产生自由基的特点，通过分子内的自由基加成关环实现多取代吡咯类化合物的光化学合成。通过以上工作的开展，探索能够简捷、高效合成吲哚和吡咯类化合物等重要中间体的有机光化学新途径, 加深对有机光化学新领域的探索，进一步拓展有机光化学反应在有机合成中的应用。

In the past decades, organic photochemical reactions have received considerable interests from both academy and industry because the reaction conditions are mild and environmental friendly. The radical involved in the procedure can be considered as the ideal clean reagent for organic synthesis in contrast to toxic chemical activators. Based upon our long-term investigation on the photoreactions, we are continuing to explore new photochemical reactions involving the alkyne group which include the intermolecular addition of benzoyl radical with 2-isocyano-1-ethynylbenzenes to form indole compounds, photochemical studies on intramolecular nitrogen radical addition to propynols, and the synthesis of pyrrole compounds through ring openning of aziridines followed by intralecular radical cyclization reactions. The research work will further develop new photoreactions and highlight the application of photochemistry in the realm of organic synthesis.