lithium diisopropyl amide in tetrahydrofuran 1.) -78 deg C, 30 min; 2.) -78 deg C, 1 h then rt., 18 h;

n-butyllithium in tetrahydrofuran 1.) -78 deg C, 30 min; 2.) -78 deg C, 1 h then reflux, 1 h; Yield given. Yields of byproduct given;