Fig. 3: Scope of the intramolecular reaction.
From: Alkyne–Alkene [2 + 2] cycloaddition based on visible light photocatalysis
Unless noted otherwise, all reactions were conducted in 0.1 mmol scale under irradiation of 12 W blue LED strip and Ar atmosphere; Isolated yields. a Reaction time: 1–18 h. b Reaction time: 24–48 h. c Reaction time: 60 h, racemate for 5r. d Reaction was conducted with 0.05 mmol scale; Reaction concentration: 0.01 M.
