Photoinduced synthesis of fluorinated dibenz[b,e]azepines via radical triggered cyclization

Chem Commun (Camb). 2019 Sep 10;55(73):10848-10851. doi: 10.1039/c9cc04977k.

Abstract

A simple, mild and efficient approach to access fluorinated dibenz[b,e]azepines via visible-light photoredox catalysis is presented. Inexpensive and commercially available fluoroalkyl anhydrides in concert with pyridine N-oxide are employed as the source of the fluoroalkyl radicals. A one-pot process involving the trifluoroacetylation of unprotected secondary benzyl amines followed by radical cyclization could also afford the desired fluorinated dibenz[b,e]azepines.