1: 61 percent / sodium hydroxide / ethanol / 3 h / Ambient temperature 2: sodium perborate tetrahydrate / acetic acid / 3 h / 50 °C 3: 35 percent Chromat. / NiCl2(PPh3)2, p-tolylmagnesium bromide / tetrahydrofuran; diethyl ether / 3 h / Ambient temperature View Scheme

1: 61 percent / sodium hydroxide / ethanol / 3 h / Ambient temperature 2: sodium perborate tetrahydrate / acetic acid / 3 h / 50 °C 3: 4 percent Chromat. / Ni(acac)2 / tetrahydrofuran; diethyl ether / 3 h / Ambient temperature View Scheme

sodium t-butanolate; palladium diacetate; CyPF-t-Bu in ethylene glycol dimethyl ether T=110°C;

Amberlyst H-15 in diethyl ether T=-78 - 20°C; 72 h;

hydrogenchloride in ethylene glycol dimethyl ether Inert atmosphere;