Reaction Steps
1 M lithium bis(trimethylsilyl)amide in toluene (0.13 mL, 0.13 mmol) was added dropwise to a solution of rac-methyl 4-((4R,7S)-7-hydroxy-1-methyl-3-(pyridin-2-yl)-7-(trifluoromethyl)-1,4,5,6,7,8-hexahydrocyclohepta[c]pyrazol-4-yl)-3-methylbenzoate (0.018 g, 0.04 mmol) and 2-methylpyridin-3-amine (6.4 mg, 0.06 mmol, Appollo) in THF (1 mL) at 0° C. The mixture was allowed to warm to rt. After about 2 h, the mixture was cooled to about 0° C. 2-Methylpyridin-3-amine (4.2 mg, 0.04 mmol) and 1 M lithium bis(trimethylsilyl)amide in toluene (0.04 mL, 0.04 mmol) were added then the mixture was allowed to warm to rt. After about 5 h a saturated aqueous NH4 Cl solution (20 mL) was added and then mixture was extracted with EtOAc (2×20 mL). The combined organic extracts were washed with brine (20 mL), dried with Na2SO4, filtered and concentrated in vacuo. The residue was purified by column chromatography (SiO2, 2-6% MeOH/DCM) to give rac-4-((4R,7S)-7-hydroxy-1-methyl-3-(pyridin-2-yl)-7-(trifluoromethyl)-1,4,5,6,7,8-hexahydrocyclohepta[c]pyrazol-4-yl)-3-methyl-N-(2-methylpyridin-3-yl)benzamide (0.001 g, 5%): LC-MS (Table 1, Method g) Rt=1.94 min, m/z 536 (M+H)+; 1H-NMR (DMSO, Bruker 400 MHz) δ 9.81 (s, 1H), 8.37-8.34 (m, 1H), 8.31-8.27 (m, 1H), 7.79-7.75 (m, 1H), 7.71-7.62 (m, 3H), 7.56-7.51 (m, 1H), 7.26-7.22 (m, 1H), 7.13-7.08 (m, 1H), 6.97 (d, J=8.0 Hz, 1H), 6.32 (s, 1H), 5.28-5.21 (m, 1H), 3.86 (s, 3H), 3.36-3.32 (m, 2H), 2.65 (s, 3H), 2.39 (s, 3H), 2.22-2.12 (m, 1H), 2.00-1.90 (m, 1H), 1.88-1.76 (m, 2H).
