Mechanism of the Reaction of Olefins with Nitrous Anhydride (O═N–O–N═O) to Form 1,2-Oxazetes
作者:G. Sudhakar Reddy、E. J. Corey
DOI:10.1021/acs.orglett.2c04080
日期:2023.1.13
The mechanistic pathway for the formation of 1,2-oxazetes by reaction of olefins with nitrous anhydride has been clarified. The initial reaction intermediate, a β-nitroso nitrite ester that is sensitive to light, undergoes O–NO fission to form a β-nitroso alkoxy radical, even with ambient fluorescent lighting but much faster with blue light irradiation. The oxygen of the alkoxy radical subsequently
通过烯烃与亚硝酸酐反应形成1,2-氧杂氮化合物的机理已经阐明。初始反应中间体是一种对光敏感的 β-亚硝基亚硝酸酯,即使在环境荧光照明下,也会发生 O-NO 裂变,形成 β-亚硝基烷氧基自由基,但在蓝光照射下速度要快得多。烷氧基的氧随后与相邻的亚硝基加成,生成环状四元亚硝酰基。然后通过消除生成C=N键,生成1,2-氧氮杂酸酯。在黑暗中不会形成 1,2-氧杂氮化合物。