1.1: toluene 2.1: sodium hexamethyldisilazane / toluene / 1.17 h / 20 °C 2.2: 24 h / 20 °C 3.1: tetrabutyl ammonium fluoride; acetic acid / tetrahydrofuran / 24 h / 23 °C View Scheme

in toluene T=20°C; Wittig reaction;