Fig. 2
Substrate scope with variations at the furan unit. Unless otherwise noted, the reactions were performed with 1, Ni(BF4)2·6H2O/L-PiMe2 (1:1, 10 mol%), in DCE at 35 °C for 4 days. Isolated yield. The dr value was determined by 1H NMR and HPLC analysis. The ee value was determined by HPLC analysis on chiral stationary phases. The reaction of 2b and 2k were scaled up to 1.0 mmol. The reaction of 2n-2p were performed at 35 °C for 8 days
