potassium tert-butylate 1.) THF, 20 deg C, 20 min, 2.) 20 deg C, 5 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

potassium tert-butylate 1.) THF, 20 deg C, 20 min, 2.) 20 deg C, 5 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;