1: 1.) sodium dithionite, water 2.) aq. NaOH / 1.) C2H5OH, H2O, reflux, 45 min, 2.) 25 deg C, 2 h 2: 1.) isoamyl nitrite, anthranilic acid / 1.) THF, reflux, 1,5 h, 2.) xylene, reflux, 1 h 3: 1.) butyllithium / 1.) ether, hexane, 0 - 5 deg C, 2 h, and 25 deg C, 1 h, 2.) ether, hexane, 25 deg C, 15 h View Scheme

n-butyllithium 1.) ether, hexane, 0 - 5 deg C, 2 h, and 25 deg C, 1 h, 2.) ether, hexane, 25 deg C, 15 h; Yield given. Multistep reaction. Yields of byproduct given;