1: With magnesium in tetrahydrofuran 2: With phosphorus trichoride in tetrahydrofuran 12 h; Heating;

1.1: 64 percent / aq. Na2CO3 / Pd(PPh3)4 / toluene / 48 h / Heating 2.1: Mg / tetrahydrofuran 2.2: 97 percent / PCl3 / tetrahydrofuran / 12 h / Heating View Scheme

1.1: 64 percent / aq. Na2CO3 / Pd(PPh3)4 / toluene / 48 h / Heating 2.1: Mg / tetrahydrofuran 2.2: 97 percent / PCl3 / tetrahydrofuran / 12 h / Heating View Scheme