Photoaddition of Aliphatic Ethers to 4-Methyl-1,2,4-triazoline-3,5-dione: Application to the Synthesis of Functionalized Crown Ethers and Mechanism
作者:Florence Risi、Ana-Maria Alstanei、Elena Volanschi、Micheline Carles、Louis Pizzala、Jean-Pierre Aycard
DOI:10.1002/(sici)1099-0690(200002)2000:4<617::aid-ejoc617>3.0.co;2-m
日期:2000.2
4-triazoline-3,5-dione (4-MTAD) with a wide variety of acyclic, cyclic and crown aliphatic ethers has been investigated. Monochromatic (λ = 514.5 nm) or polychromatic (λ ≥ 310 nm) irradiations give identical mono-urazolyl ethers as reaction products. Unsymmetrical acyclic ethers afford a mixture of the two α and α′ mono-urazolyl ethers. In the case of 12-crown-4, mono and di-substituted products are obtained
已经研究了4-甲基-1,2,4-三唑啉-3,5-二酮(4-MTAD)与各种各样的无环,环状和冠状脂族醚的光加成反应。单色(λ= 514.5 nm)或多色(λ≥310 nm)辐照产生相同的单脲基醚作为反应产物。不对称的无环醚提供了两种α和α'单-铀唑基醚的混合物。在12-冠-4的情况下,获得单取代和二取代的产物。进行了在AM1和6-31G *水平的ESR实验和量子计算,并提出了一种可能的反应机理,其中最可能的光化学过程是导致铀唑基自由基的H吸收。