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单线态氧在有机反应中有着广泛应用,尤其是在光敏反应中更为重要;在医药、化妆品及食物等的抗氧性方面,也将拥有更广阔的前景。目前,国内外对单线态氧已有很多研究,但尚未发现对单线态氧的化学反应的综述型文章,本文仅对其化学反应进行阐述,为研究者提供认识捷径。单线态氧~1O_2进行的是双电子反应(类似乙烯),而不象顺磁性的三线态氧~3∑_9~-那样参与自由基反应。单线态氧~1O_2的反应是很重要的,因为在一个高度立体专一的有机化合物中能使氧的引入非常容易。单线态氧1O_3有三种主要反应:与烯的“ene”反应,Diels—Alder 型环加成反应和与活泼双键的加成反应。三种反应示例如下:1 与烯的“ene”反应该反应包括双键的迁移,先形成一个烯丙基过氧化物,此过氧化物的形成经历过环氧化物中间体,Sharp 首先提出在烯烃孤立双键单线态加成中此中间体存在的实验证据。
Singlet oxygen is widely used in organic reactions, especially in the photosensitive reaction is more important; in the pharmaceutical, cosmetics and food, such as the antioxidant, will also have a broader perspective. At present, there are many studies on singlet oxygen at home and abroad, but no review article has been found on the chemical reaction of singlet oxygen. This article only describes the chemical reactions and provides researchers with a short cut. Singlet oxygen ~ 1O 2 is a two-electron reaction (similar to ethylene), unlike the paramagnetic triplet oxygen ~ 3Σ_9 ~ - that participate in free radical reactions. The reaction of singlet oxygen ~ 1 O 2 is important because oxygen can be introduced very easily in a highly sterically-specific organic compound. Singlet oxygen 1O_3 has three main reactions: the ene reaction with diene, the Diels-Alder ring addition reaction and the addition reaction with the active double bond. An example of the three reactions is as follows: 1 Reactions with ene “ene” The reaction involves the migration of double bonds, first forming an allyl peroxide, which undergoes epoxide intermediate formation. Sharp first proposed Experimental evidence of the presence of this intermediate in the soliton double bond singlet addition of olefins.