Fig. 3: Scope studies.

Reactions conducted using 1 equiv 2-acyl imidazole, 10 equiv alkene, 20 mol% AC-3 in toluene, irradiating for 14 h with a Kessil H150 LED unless otherwise noted. Yields represent the isolated yield of both diastereomers. Enantiomeric excess of the major diastereomer determined by chiral HPLC. ^aConducted for 24 h. ^bConducted with 40 mol% acid catalyst AC-3. ^cConducted in CH₂Cl₂.