1: 1) diisopropyl amine, n-BuLi / 1) THF, -45 deg C to -20 deg C in 1.5 h; 2) -78 deg C to -20 deg C in 20 h 2: 46.1 g / trifluoroacetic acid / 18 h / Ambient temperature View Scheme

in trifluoroacetic acid 18 h; Ambient temperature;

toluene-4-sulfonic acid 2 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

potassium hydroxide; lithium aluminium tetrahydride; Celite 1) ether, 2.5 h at room temp.; 2) water, 30 min.; Yield given. Multistep reaction;