Reaction Steps
1 M lithium bis(trimethylsilyl)amide in toluene (0.24 mL, 0.24 mmol) was added dropwise to a solution of rac-methyl 4-((4R,7R)-7-hydroxy-1-methyl-3-(pyridin-2-yl)-7-(trifluoromethyl)-1,4,5,6,7,8-hexahydrocyclohepta[c]pyrazol-4-yl)-3-methylbenzoate (0.034 g, 0.07 mmol) and 2-methylpyridin-3-amine (0.012 g, 0.11 mmol, Appollo) in THF (2 mL) at about 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 (0.008 g, 0.07 mmol) and 1 M lithium bis(trimethylsilyl)amide in toluene (0.07 mL, 0.07 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). The appropriate fractions were concentrated in vacuo. The product was recrystallized from Et2O to give rac-4-((4R,7R)-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 (0.005 g, 12%): LC-MS (Table 1, Method g) Rt=1.86 min, m/z 536 (M+H)+; 1H-NMR (DMSO, Bruker 400 MHz) δ 9.85 (s, 1H), 8.44-8.41 (m, 1H), 8.32-8.29 (m, 1H), 7.82-7.78 (m, 1H), 7.75-7.67 (m, 3H), 7.60-7.56 (m, 1H), 7.26-7.22 (m, 1H), 7.18-7.14 (m, 1H), 6.98 (d, J=8.0 Hz, 1H), 6.21 (s, 1H), 5.61-5.55 (m, 1H), 3.93 (s, 3H), 3.40-3.32 (m, 2H), 2.61 (s, 3H), 2.40 (s, 3H), 2.36-2.26 (m, 1H), 1.93-1.83 (m, 1H), 1.80-1.71 (m, 2H).
