diisobutylaluminium hydride; magnesium bromide 1.) a.) CH2Cl2, RT, 1 h, b.) -78 deg C, 1 h, 2.) toluene, -78 deg C; Multistep reaction. Title compound not separated from byproducts;

diisobutylaluminium hydride; magnesium bromide 1.) a.) CH2Cl2, RT, 1 h, b.) -78 deg C, 1 h, 2.) toluene, -78 deg C; Multistep reaction. Title compound not separated from byproducts;