triethylamine in tetrahydrofuran T=0°C; 2 h; Title compound not separated from byproducts;

1: 83 percent 2: 1) t-BuLi, LiClO4; 2) H2O / 1) THF-pentane, -100 deg C then room temperature; 2) room temperature View Scheme

pyridine 24 h; Heating;

water; tert.-butyl lithium; lithium perchlorate 1) THF-pentane, -100 deg C then room temperature; 2) room temperature; Yield given. Multistep reaction. Yields of byproduct given;