tert-Butyl 4-formylpiperidine-1-carboxylate → tert-butyl 4-((2-(((3,5-bis(trifluoromethyl)benzyl)(2-methyl-2H-tetrazol-5-yl)amino)methyl)-4-(trifluoromethyl)phenyl)(hydroxy)methyl)piperidine-1-carboxylate

Temperature

0 °C

To a solution of (3,5-bis-trifluoromethyl-benzyl)-(2-bromo-5-trifluoromethyl-benzyl)-(2-methyl-2H-tetrazol-5-yl)-amine (115 mg, 0.21 mmol) in THF (0.5 mL) at 0° C. was added i-PrMgCl/LiCl (0.3 mL, 0.39 mmol). The mixture was stirred 0° C. for 3 hours and tert-butyl 4-formylpiperidine-1-carboxylate (70.7 mg, 0.33 mmol) in THF (0.1 mL) was added. The mixture was stirred at 0° C. to room temperature for 3 hours and quenched with saturated aqueous ammonium chloride. The mixture was extracted with ethyl acetate. Combined organic layers were washed with brine, dried over sodium sulfate and concentrated in vacuo. The residue was purified by chromatography over 25+S Biotage silica column (eluted with 0-50% ethyl acetate in hexanes) to afford the title compound (62.2 mg, 44%). 1H NMR (400 MHz, CDCl3) δ ppm 1.12-1.19 (m, 1H) 1.20-1.32 (m, 1H) 1.43 (s, 9H) 1.69-1.78 (m, 1H) 1.89 (dd, J=13.07, 1.87 Hz, 1H) 2.46-2.67 (m, 2H) 3.99-4.15 (m, 2H) 4.18 (s, 3H) 4.66-4.73 (m, 2H) 4.68-4.83 (m, 4H) 4.87 (d, J=15.77 Hz, 1H) 7.33 (s, 1H) 7.55 (s, 2H) 7.64 (s, 2H) 7.77 (s, 1H). MS (ES+) Calc: 696.2, Found: 697.6 (M+1)

1. stirringThe mixture was stirred at 0° C. to room temperature for 3 hours
2. customquenched with saturated aqueous ammonium chloride
3. extractionThe mixture was extracted with ethyl acetate
4. washCombined organic layers were washed with brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated in vacuo
7. customThe residue was purified by chromatography over 25+S Biotage silica column (eluted with 0-50% ethyl acetate in hexanes)

ORD record

ord-259734118b32422b9ea04634ea7bed60

Source dataset

uspto-grants-2011_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07919506B2