1.1: 82 percent / aq. K2CO3 / Pd(PPh3)4 / ethanol / 18 h / 80 °C 2.1: i-PrMgCl / tetrahydrofuran / 2 h / -40 °C 2.2: aq. HCl / tetrahydrofuran / 1 h View Scheme

1.1: 82 percent / aq. K2CO3 / Pd(PPh3)4 / ethanol / 18 h / 80 °C 2.1: i-PrMgCl / tetrahydrofuran / 2 h / -40 °C 2.2: 85 percent / aq. HCl / tetrahydrofuran / 1 h View Scheme

potassium carbonate; tetrakis(triphenylphosphine) palladium(0) in ethanol T=80°C; 18 h;