New spiropyrans based on 1,3-benzoxazine-2-one: acid catalyzed synthesis and theoretical insight into the photochromic activity
作者:Ilya V. Ozhogin、Igor V. Dorogan、Boris S. Lukyanov、Eugene L. Mukhanov、Valery V. Tkachev、Anatoly V. Chernyshev、Maria B. Lukyanova、Sergey M. Aldoshin、Vladimir I. Minkin
DOI:10.1016/j.tetlet.2016.04.054
日期:2016.6
A new series of spiropyrans based on 1,3-benzoxazine-2-one were synthesized using acid catalysis. Contrary to expectations, 6′-bromo-6-chloro-3-methyl-8′-nitro-spiro[1,3-benzoxazine-4,2′-chromene]-2-one and 6,6′-dichloro-3-methyl-8′-nitro-spiro[1,3-benzoxazine-4,2′-chromene]-2-one did not exhibit photochromic behavior, which was explained by TD DFT calculations to be a consequence of the existence
利用酸催化合成了一系列新的基于1,3-苯并恶嗪-2-酮的螺吡喃。与预期相反,6'-溴-6-氯-3-甲基-8'-硝基-螺[1,3-苯并恶嗪-4,2'-亚甲基] -2-一和6,6'-二氯-3 -甲基-8'-硝基-螺[1,3-苯并恶嗪-4,2'-亚甲基] -2-酮没有表现出光致变色行为,这是通过TD DFT计算解释为存在有效的结果非辐射衰变途径允许螺吡喃在第一个单重态激发态下结构弛豫。