The title compound of Step A (0.20 g, 0.80 mmol) was dissolved in absolute ethanol (7 mL) and a solution of 1-[3-(trifluoromethyl)pyridin-2-yl]-1-methylhydrazine in ethanol (3 mL) was added followed by 3 drops of glacial acetic acid. The mixture was warmed to 50° C. for 1 h, cooled to room temperature and then diluted with aqueous sodium bicarbonate and extracted three times with ethyl acetate. The combined organic phases were dried (MgSO4), filtered and concentrated to give 0.38 g of the title compound of Step B as a yellow solid. 1H NMR (300 MHz. CDCl3): δ 8.42 (d.1H. J=5 Hz), 8.16 (d,1H, J=8 Hz), 8.01 (d,1H, J=8 Hz), 7.51 (t,1H, J=8 Hz), 7.42 (t,1H), J=8 Hz), 7.35 (s,1H), 7.21 (d,1H, J=8 Hz), 7.03 (dd,1H, J=8, 5 Hz), 3.56 (s,6H).
