Synthesis of Pinpoint-Fluorinated Polycyclic Aromatic Hydrocarbons: Benzene Ring Extension Cycle Involving Microwave-Assisted S<sub>N</sub>Ar Reaction
作者:Kohei Fuchibe、Hisanori Imaoka、Junji Ichikawa
DOI:10.1002/asia.201700870
日期:2017.9.19
groups (non‐activated fluoroarenes) readily underwent nucleophilic aromatic substitution with α‐cyanocarbanions under microwave irradiation. The sequence (i) formylalkylation involving the cyanoalkylation of fluoroarenes, (ii) difluorovinylidenation, and (iii) Friedel–Crafts‐type cyclization, afforded extended fluoroarenes by one benzene ring per cycle. Furthermore, the performance of multiple cycles