1: 85 percent / catalyst de Wilkinson / 0.08 h / 90 °C 2: 32 percent Spectr. / hexamethyldisilazane de sodium / pentane / 1.) -15 deg C, 1.5 h; 2.) rt., 1 h 3: CDCl3 / 24 h / Ambient temperature View Scheme

in hexane

1: catalyst de Wilkinson / 0.08 h / 90 °C 2: NaN(SiMe3)2 / pentane / -15 deg C, 1.5 h; rt., 1 h 3: triethylamine / methanol / 12 h / Heating View Scheme