Visible-Light-Mediated [2+2+1] Carbocyclization Reactions Of 1,7-Enynes With Bromofluoroacetate To Form Fused Monofluorinated Cyclopenta[C]Quinolin-4-Ones

Herein, we describe a new protocol for photoinduced radical [2+2+1] carbocyclization reactions of 1,7-enynes with bromofluoroacetate. These reactions, which proceed via a cascade involving fluoroalkylation, 6-exo-dig and 5-endo-trig cyclizations, H-transfer step, and oxidative dehydrogenation, provide an efficient and general route to a variety of fused monofluorinated cyclopenta[c]quinolin-4-one derivatives.