1: 1) n-BuLi / 1) THF, 1 h, RT; 2) warming from -78 deg C to RT 3: 1.) thallous ethoxide / 1) benzene, 1.5 h, roomtemp.; 2) 1 h, roomtemp. View Scheme

2: 1.) thallous ethoxide / 1) benzene, 1.5 h, roomtemp.; 2) 1 h, roomtemp. View Scheme

thallium ethylate 1) benzene, 1.5 h, roomtemp.; 2) 1 h, roomtemp.; Yield given. Multistep reaction. Yields of byproduct given;