Percent yield determined by GC-FID with a calibration curve. b Enantiomeric ratio (er) determined by HPLC with a chiral stationary phase. Peaks reported in order of elution. c 5 mol% Fe(acac)3 was added during the reaction setup. Additional 5 mol% Fe(acac)3 was added as a 0.08 M solution in EtOH at 24 h and 48 h. d 5 mol% Fe(acac)3 was added during the reaction setup. Additional 5 mol% Fe(acac)3 was added as a 0.07 M solution in 95:5 dioxane:EtOH at 24 h and 48 h. e 3.3 mol% C1 was added during the reaction setup. Additional 3.3 mol% C1 was added as a solid at 24 h and 48 h. across 3 days slightly increased yield without decreasing er, but was not significantly beneficial (Table , entry 8).