Stereospecific photochemistry of Δ2-1,2,3-triazolines in solution and in the solid state: scope and mechanistic studies
作者:Tim S. Chung、Yang Xue、Alberto Carranza、Miguel A. Garcia-Garibay
DOI:10.1039/c7pp00187h
日期:2017.9
The stereospecific photochemistry of ten N-aryl-substituted cis- or trans-Δ2-1,2,3-triazolines to form the corresponding cis- or trans-aziridines was investigated both in solution and in the solid-state. We found that photochemical reactions in the solid state are more stereospecific than in solution for the 8 crystalline Δ2-1,2,3-triazolines. Additionally, triplet sensitization for some triazolines
10的立体有择光化学ñ -芳基取代的顺式-或反式-Δ 2 -1,2,3- triazolines以形成相应的顺式-或反式在溶液中和在固态-aziridines进行了研究。我们发现,在固体状态下的光化学反应比在用于8结晶Δ溶液更立体有择2 -1,2,3- triazolines。此外,对某些三唑啉的三重态敏化会产生三重态双基团,从而提供了热力学上更有利的反式-氮丙啶不考虑起始的三唑啉立体化学。产品分析如温度和溶剂极性的功能提示,Δ的电子激发2在1,3-双自由基中间体的形成-1,2,3- triazolines结果。