1: 72 percent / Raney-Ni / methanol; dioxane / Ambient temperature 2: 85 percent / Bu4NF / tetrahydrofuran / 2 h / Ambient temperature 3: 1) POCl3; 2) (Bu3NH)4P2O7, Bu3N / 1) PO(OMe)3, 4 deg C, 3 h; 2) DMF, 0 deg C, 1 min View Scheme

1: 79 percent / Bu4NF / tetrahydrofuran / 2 h / Ambient temperature 2: 1) POCl3; 2) (Bu3NH)4P2O7, Bu3N / 1) PO(OMe)3, 4 deg C, 3 h; 2) DMF, 0 deg C, 1 min View Scheme