1: 95 percent / NBS, hydroquinone / acetone / 1 h / Heating 2: 1.) BuLi / 1.) THF, hexane, 2 - 3 min; 2.) 2 h, RT View Scheme

1: 1.) K / 1.) THF, 15 min, reflux; 12 h, RT; 2.) 12 h, RT 2: 95 percent / NBS, hydroquinone / acetone / 1 h / Heating 3: 1.) BuLi / 1.) THF, hexane, 2 - 3 min; 2.) 2 h, RT View Scheme

n-butyllithium 1.) THF, hexane, -23 deg C, 2 h; Yield given. Multistep reaction;

n-butyllithium 1.) THF, hexane, 2 - 3 min; 2.) 2 h, RT; Yield given. Multistep reaction;