1: 1.) (i-Pr)2NLi / 1.) THF, from -78 deg C to -65 deg C, 5 min, 2.) THF, -78 deg C, 15 min 2: 90 percent / 5N HCl / tetrahydrofuran / from -50 deg C to room temperature View Scheme

3 h; Heating;

Yield given. Multistep reaction;

Aliquatreg; 336; potassium carbonate in dichloromethane T=20°C; 24 h;