1: PPh3 / tetrahydrofuran; H2O / 14 h / Ambient temperature 2: K2CO3 / tetrahydrofuran; H2O / 24 h / Ambient temperature 3: 96 percent / PPh3 / Pd2(dba)3*CHCl3 / tetrahydrofuran / 2 h / Ambient temperature 4: 47 percent / DBU, TBA oxone, Cs2CO3 / CH2Cl2 / 1.) r.t., 30 min, 2.) sonication, 4 h; r.t., 40 h View Scheme

1: PPh3 / tetrahydrofuran; H2O / 14 h / Ambient temperature 2: K2CO3 / tetrahydrofuran; H2O / 24 h / Ambient temperature 3: 96 percent / PPh3 / Pd2(dba)3*CHCl3 / tetrahydrofuran / 2 h / Ambient temperature 4: 47 percent / DBU, TBA oxone, Cs2CO3 / CH2Cl2 / 1.) r.t., 30 min, 2.) sonication, 4 h; r.t., 40 h 5: 73 percent / LiBH4 / diethyl ether / 2 h / Ambient temperature View Scheme