2,4,5-Trifluorophenyl isothiocyanate (252 mg, 1.33 mmol) was added in one portion to a suspension of trans-ethyl 2-[4-(4-{[hydrazino(oxo)acetyl]amino}phenyl)cyclo-hexyl]propanoate (Intermediate 99, 400 mg, 1.11 mmol) in DMA (6 mL) and the reaction mixture was stirred at room temperature for 2 h. EDCI (319 mg, 1.66 mmol) was added in one portion and the reaction mixture was heated to 90° C. for 10 mins in the microwave. The mixture was then cooled to room temperature and H2O (20 mL) was added. The mixture was filtered to leave a solid, which was washed with H2O (10 mL) to give the title compound (550 mg, 95%) as a solid; 1H NMR δ 1.1 (3H, d), 1.12-1.28 (2H, m), 1.2 (3H, t), 1.35-1.51 (2H, m), 1.52-1.64 (1H, m), 1.65-1.75 (1H, m), 1.77-1.9 (3H, m), 2.22-2.32 (1H, m), 2.38-2.51 (1H, m), 4.01-4.16 (2H, m), 7.2 (2H, d), 7.65-7.78 (1H, m), 7.69 (2H, d), 8.1-8.25 (1H, m), 10.95 (1H, s), 11.05 (1H, s); MS m/e MH+ 517.
