1: 91 percent / potassium fluoride / tetrahydrofuran; H2O / 12 h / Heating 2: 88 percent / diisopropylamine; butyllithium / hexane; tetrahydrofuran / 2 h 3: 92 percent / butyllithium; butylmagnesium chloride / tetrahydrofuran; hexane; toluene / 0.75 h / 0 °C View Scheme

1: 91 percent / potassium fluoride / tetrahydrofuran; H2O / 12 h / Heating 2: 88 percent / diisopropylamine; butyllithium / hexane; tetrahydrofuran / 2 h View Scheme

potassium fluoride in tetrahydrofuran; water 12 h; Heating;

Faigl mix in tetrahydrofuran; hexane T=-100°C; 2 h;

1: 78 percent / butyllithium; 2,2,6,6-tetramethylpiperidine / hexane; tetrahydrofuran / -75 °C 2: 46 percent / Faigl mix / hexane; tetrahydrofuran / 2 h / -100 °C View Scheme

1: 78 percent / butyllithium; 2,2,6,6-tetramethylpiperidine / hexane; tetrahydrofuran / -75 °C 2: 46 percent / Faigl mix / hexane; tetrahydrofuran / 2 h / -100 °C View Scheme