Fig. 3: Substrate scope.
From: Pyridinium ylides as photocatalytic atom transfer reagents
A Substrate scope of alkenes and N-amine substituents in aziridination. B Alkene scope of epoxidation. Reaction conditions: ylide (0.05 mmol), alkene (0.05 mmol) and photocatalyst in dichloromethane (0.05 M), irradiated with a Penn PhD Photoreactor M2 or Kessil LED under air at r.t. for 2 h. Isolated yields are given. *Reactions performed using PC7 (1 mol%) under 450 nm irradiation. †Reactions performed using PC8 (1 mol%) under 450 nm irradiation. ‡Reactions performed with CsF (1 equiv) as an additive. §Reactions performed with 2 equiv of alkene. #Reactions performed with 10 equiv of alkenes. The yield in parentheses was determined by 1H NMR analysis of the crude reaction mixture using 1,1,2,2-tetrabromoethane as an internal standard.
