1: 1.) t-BuOK; 2.) 2N HCl / 1.) t-butyl methyl ether, -10 deg C - RT, 165 min; 2.) THF, reflux, 30 min 2: 0.8 M n-BuLi / tetrahydrofuran; hexane / 1.17 h / -20 °C View Scheme