N‐Heterocyclic Carbene Catalyzed Photoenolization/Diels–Alder Reaction of Acid Fluorides
作者:Andreas Mavroskoufis、Keerthana Rajes、Paul Golz、Arush Agrawal、Vincent Ruß、Jan P. Götze、Matthew N. Hopkinson
DOI:10.1002/anie.201914456
日期:2020.2.17
aromatic aldehydes and ketones. Stoichiometric studies and TD‐DFT calculations support a mechanism involving the photoactivation of an ortho‐toluoyl azolium intermediate, which exhibits “ketone‐like” photochemical reactivity under UVA irradiation. Using this photo‐NHC catalysis approach, a novel photoenolization/Diels–Alder (PEDA) process was developed that leads to diverse isochroman‐1‐one derivatives
光活化和 N-杂环卡宾 (NHC) 有机催化相结合,使得能够使用酰基氟作为 UVA 光介导的光化学转化的底物,而这种转化以前仅在芳香醛和酮中观察到。化学计量研究和 TD-DFT 计算支持涉及邻甲苯甲酰唑中间体光活化的机制,该中间体在 UVA 照射下表现出“酮样”光化学反应性。利用这种光-NHC催化方法,开发了一种新型光烯醇化/狄尔斯-阿尔德(PEDA)工艺,可产生多种异色满-1-酮衍生物。