1: 85 percent / 168 h / Ambient temperature 2: 1) 15percent LiBu / 1) 3 h, r. t., anh. ether, n-hexane, 2) 12 h, r. t., anh. THF View Scheme

n-butyllithium 1) anh. ether, n-hexane, 3 h, r. t., 2) anh. THF, 12 h, r. t.; Yield given. Multistep reaction. Yields of byproduct given;