T=155°C;

Multi-step reaction with 2 steps 1: 1) n-butyllithium / 1) THF, cyclohexane, -45 deg C to -40 deg C, 2) a) -60 deg C to room temperature, b) 35 deg C to 40 deg C, 20 min2: 1) n-butyllithium / 1) THF, cyclohexane, -40 deg C, 2) a) -65 deg C to room temperature, 3h, b) 35 deg C, 20 min