sodium chloride in dimethyl sulfoxide T=145°C; 3 h;

1: potassium tert-butylate / tetrahydrofuran / 72 h / 20 °C / Molecular sieve 2: toluene-4-sulfonic acid / toluene / 18 h / Reflux 3: sodium chloride / dimethyl sulfoxide / 3 h / 145 °C View Scheme

1: toluene-4-sulfonic acid / toluene / 18 h / Reflux 2: sodium chloride / dimethyl sulfoxide / 3 h / 145 °C View Scheme

lithium aluminium tetrahydride in tetrahydrofuran T=20°C; 4 h;