lithium diisopropyl amide 1.) THF, -40 deg C -> room temperature; reflux, 1 h, 2.) -78 deg C, 2.5 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

lithium diisopropyl amide 1.) THF, -40 deg C -> room temperature; reflux, 1 h, 2.) -78 deg C, 2.5 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;