1,2-Diaminocyclohexane → 1-(3-chloro-4-fluorophenyl)-6-[4-(2-oxo-1-piperidinyl)phenyl]-3-(trifluoromethyl)-1,4,5,6-tetrahydro-7H-pyrazolo[3,4-c]pyridin-7-one

Temperature

110 °C

Part B. 1-(3-chloro-4-fluorophenyl)-6-[4-iodophenyl]-3-(trifluoromethyl)-1,4,5,6-tetrahydro-7H-pyrazolo[3,4-c]pyridine-7-one (0.54 g, 1.0 mmol), δ-valerolactam (0.12 g, 1.2 mmol), 1,2-diaminocyclohexane (11.4 mg, 0.1 mmol), K3PO4 (0.42 g, 2 mmol) and CuI (2 mg, 0.01 mmol) were added to 5 mL of 1,4-dioxane. The mixture was degassed under argon and stirred at 110° C. under N2 for 48 h. The mixture was then cooled to rt. The dioxane was removed. The residue was dissolved in EtOAc (100 mL), washed with HCl (1N, 30 mL), water (50 mL×2), and brine (50 mL), dried over Na2SO4, filtered, and concentrated. The residue was purified via flash chromatography on silica gel using 1:2 hexane:ethylacetate to give the desired product (0.41 g, 80% yield). LRMS (ES+): 507.1 (M+H)+. 1H NMR (CDCl3) δ 7.68–7.65 (m, 1H), 7.50–7.45 (m, 1H), 7.36–7.16 (m, 5H), 4.16 (t, 2H), 3.64–3.62 (m, 2H), 3.47 (br, 3H), 3.17 (t, 2H), 2.62 (t, 2H), 1.98–1.96 (m, 3H).

1. customThe mixture was degassed under argon
2. temperatureThe mixture was then cooled to rt
3. customThe dioxane was removed
4. dissolutionThe residue was dissolved in EtOAc (100 mL)
5. washwashed with HCl (1N, 30 mL), water (50 mL×2), and brine (50 mL)
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue was purified via flash chromatography on silica gel using 1:2 hexane

ORD record

ord-da911549baed4470bcf02e03af5bbd35

Source dataset

uspto-grants-2006_02

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06995172B2