1: 85 percent / sulfuric acid / Ambient temperature 2: 1.) chlorotrimethylsilane / 1) pyridine, room temperature, 1 h; 2) pyridine, room temperature, 2 h View Scheme

chloro-trimethyl-silane 1) pyridine, room temperature, 1 h; 2) pyridine, room temperature, 2 h; Yield given. Multistep reaction;

1: sodium hydride / dimethylformamide / 48 h / Ambient temperature 2: sodium methoxide / dimethylformamide / Ambient temperature 3: 47 percent / bromotrimethylsilane / acetonitrile / Ambient temperature View Scheme