A solution of (Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)acrylic acid (0.2 g, 0.569 mmol) and 2-morpholino-2-oxoacetohydrazide (0.02 g, 0.175 mmol) in THF (3 mL) was cooled to −60° C. T3P (0.098 g, 0.569 mmol) (0.50 mL) was added dropwise followed by DIPEA (0.11 g, 0.854 mmol) and stirred at −60° C. for 1 h. The reaction mixture was transferred into 25 mL of iced water and extracted with ethyl acetate (2×25 mL). Combined organic layers were washed with brine, dried over anhydrous sodium sulphate, and concentrated under reduced pressure to give 0.3 g of crude product, which was purified by chromatography (0-4% MeOH/CH2Cl2) to give 0.15 g of (Z)-3-(3-(3,5-bis(trifluoromethyl)phenyl)-1H-1,2,4-triazol-1-yl)-N′-(2-morpholino-2-oxoacetyl) acrylohydrazide (Yield 50%). 1H NMR (400 MHz, DMSO-d6) δ 10.70-10.88 (m, 2H), 9.56 (s, 1H), 8.57 (s, 2H), 8.29 (s, 1H), 7.52-7.55 (d, J=10.4 Hz, 1H), 6.0-6.03 (d, J=10.4 Hz, 1H), 3.51-3.64 (m, 8H). LCMS m/z 507.25 [M+H]+, tR=2.012 min.
