Preferential Photoreaction in a Porous Crystal, Metal–Macrocycle Framework: Pd<sup>II</sup>-Mediated Olefin Migration over [2+2] Cycloaddition
作者:Hirotaka Yonezawa、Shohei Tashiro、Takafumi Shiraogawa、Masahiro Ehara、Rintaro Shimada、Takeaki Ozawa、Mitsuhiko Shionoya
DOI:10.1021/jacs.8b08534
日期:2018.12.5
A nanosized confined space with well-defined functional surfaces has great potential to control the efficiency and selectivity of catalytic reactions. Herein we report that a 1,6-diene, which normally forms an intramolecular [2+2] cycloadduct under photoirradiation, preferentially undergoes a photoinduced olefin migration in a porous crystal, metal-macrocycle framework (MMF), and alternatively [2+2]
具有明确功能表面的纳米级密闭空间在控制催化反应的效率和选择性方面具有巨大潜力。在本文中,我们报告了通常在光照射下形成分子内 [2+2] 环加合物的 1,6-二烯,优先在多孔晶体、金属-大环骨架 (MMF) 和 [2+2 ] 环加成在密闭空间中被完全抑制。基于紫外-可见漫反射光谱、单晶 XRD 和 MS-CASPT2 计算,提出了由 Pd-Cl 键的光致离解引发的烯烃迁移的合理反应机制。还使用取代的烯丙基苯衍生物检查了 MMF 中光致烯烃迁移的底物范围。