1.1: sodium tetrahydroborate; acetic acid / 20 °C 2.1: tri-tert-butyl phosphine; potassium tert-butylate; palladium diacetate / anhydrous xylene / 120 °C 3.1: trichlorophosphate / 10 °C 3.2: 20 °C 4.1: ammonium acetate; acetic acid / 120 °C View Scheme

1.1: tri-tert-butyl phosphine; potassium tert-butylate; palladium diacetate / anhydrous xylene / 120 °C 2.1: trichlorophosphate / 10 °C 2.2: 20 °C 3.1: ammonium acetate; acetic acid / 120 °C View Scheme

1.1: sodium acetate; acetic acid / dichloromethane; water / 2 h / Reflux 2.1: sodium tetrahydroborate; acetic acid / 20 °C 3.1: tri-tert-butyl phosphine; potassium tert-butylate; palladium diacetate / anhydrous xylene / 120 °C 4.1: trichlorophosphate / 10 °C 4.2: 20 °C 5.1: ammonium acetate; acetic acid / 120 °C View Scheme

1.1: sodium acetate; acetic acid / dichloromethane; water / 2 h / Reflux 2.1: sodium tetrahydroborate; acetic acid / 20 °C 3.1: tri-tert-butyl phosphine; potassium tert-butylate; palladium diacetate / anhydrous xylene / 120 °C 4.1: trichlorophosphate / 10 °C 4.2: 20 °C 5.1: ammonium acetate; acetic acid / 120 °C View Scheme

ammonium acetate; acetic acid T=120°C;

1.1: trichlorophosphate / 10 °C 1.2: 20 °C 2.1: ammonium acetate; acetic acid / 120 °C View Scheme