Triethylamine → 2-(2-(Trifluoromethyl)phenyl)acetamide

Sodium triacetoxyborohydride (140 mg, 0.66 mmol) was added to a solution of (RS)-3,3-difluoro-4-methylpiperidine hydrochloride (Description 60, 67 mg, 0.44 mmol), (RS)-α-methyl-N-(4-oxo-1-phenylcyclohexyl)-3,5-bis(trifluoromethyl)benzeneacetamide (Example 3, 150 mg, 0.33 mmol) and triethylamine (110 mL, 0.88 mmol) in dichloroethane (30 mL) and the mixture was stirred at room temperature for 72 hours. Saturated aqueous sodium hydrogen carbonate (3 mL) and dichloromethane (5 mL) were added and the layers were separated. The organic fraction was poured onto an SCX cartridge (Varian Bond Elut™; 10 mL/500 mg). The cartridge was washed with methanol (4×2 mL), then eluted with methanolic ammonia (2M, 2×2 mL). The solvent was evaporated under reduced pressure and the residue was purified by flash column chromatography on silica gel, eluting with CH2Cl2/MeOH/NH3(Aq.) (95:5:1), to give trans-(RS)-α-methyl-N-[4-(3-fluoro-1,2,5,6-tetrahydro-4-methylpyrid-1-yl)-1-phenylcyclohexyl]-3,5-bis(trifluoromethylbenzeneacetamide (16 mg, 7%); 1H NMR (360 MHz, CD3OD) δ 1.33 (3H, d, J 6.5 Hz), 1.35–2.05 (9H, m), 1.63 (3H, s), 2.36–2.63 (4H, m), 2.74–2.78 (1H, m), 2.95–3.05 (1H, m), 3.83 (1H, q, J 7.2 Hz), 7.12–7.39 (5H, m), 7.79 (2H, s), and 7.81 (1H, s); m/z (ES+) 557 (M+1); cis-(RS)-α-methyl-N-[4-(3-fluoro-1,2,5,6-tetrahydro-4-methylpyrid-1-yl)-1-phenylcyclohexyl]-3,5-bis(trifluoromethylbenzeneacetamide (12 mg, 5%); 1H NMR (400 MHz, CD3OD) δ 1.22–1.28 (1H, m), 1.44 (3H, d, J 6.8 Hz), 1.43–1.54 (1H, m), 1.62 (3H, s), 1.72–1.85 (4H, m), 2.00–2.09 (2H, m), 2.42–2.61 (5H, m), 2.91–3.00 (2H, m), 4.02 (1H, q, J 6.8 Hz), 7.12–7.28 (5H, m), 7.94 (2H, s), and 8.14 (1H, s);. m/z (ES+) 557 (M+1); (2R*,4′R*)-trans-, (2S*,4′R*)-trans-, (2R*,4′R*)-cis-, and (2S*,4′R*)-cis-α-methyl-N-[4-(3,3-difluoro-4-methylpiperidin-1-yl)-1-phenylcyclohexyl]-3,5-bis(trifluoromethylbenzeneacetamide as a mixture of diastereoisomers (13 mg, 5%); 1H NMR (360 MHz, CD3OD) δ 1.36 (3H, d, J 7.2 Hz), 1.45 (3H, d, J 6.8 Hz), 1.53–1.83 (6H, m), 1.84–1.98 (2H, m), 2.09–2.25 (2H, m), 2.37–2.51 (2H, m), 2.58–2.92 (3H, m), 2.98–3.03 (1H, m), 3.89 and 4.09 (total 1H, each q, J 7.2 Hz)}, 7.13–736 (5H, m), and 7.80–8.18 (3H, m); m/z (ES+) 577 (M+1).

1. customthe layers were separated
2. additionThe organic fraction was poured onto an SCX cartridge (Varian Bond Elut™; 10 mL/500 mg)
3. washThe cartridge was washed with methanol (4×2 mL)
4. washeluted with methanolic ammonia (2M, 2×2 mL)
5. customThe solvent was evaporated under reduced pressure
6. customthe residue was purified by flash column chromatography on silica gel
7. washeluting with CH2Cl2/MeOH/NH3(Aq.) (95:5:1)

ORDレコード

ord-da44cdea3b2546e7b6d09f99badf97e1

出典データセット

uspto-grants-2006_09

DOI

10.6084/m9.figshare.5104873.v1

特許番号

US07105507B2