1) THF, hexane, -78 deg C, 2 h, 2) 0 deg C, 3) DMF, room temperature, 42 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;

1) THF, hexane, -78 deg C, 2 h, 2) 0 deg C, 3) DMF, room temperature, 42 h; Yield given. Multistep reaction. Yields of byproduct given. Title compound not separated from byproducts;