Sodium hydride → benzyl 4-((1R,2S)-2-(2-(5-(methylsulfonyl)pyridin-2-yloxy)ethyl)cyclopropyl)piperidine-1-carboxylate

HRID 1850712Notes

Reaction equation

HRID 1850712 reaction equation
[H-].[Na+].[OH:3][CH2:4][CH2:5][C@@H:6]1[CH2:8][C@@H:7]1[CH:9]1[CH2:14][CH2:13][N:12]([C:15]([O:17][CH2:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)=[O:16])[CH2:11][CH2:10]1.Br[C:26]1[CH:31]=[CH:30][C:29]([S:32]([CH3:35])(=[O:34])=[O:33])=[CH:28][N:27]=1>CN(C)C=O.C(OCC)(=O)C.O>[CH3:35][S:32]([C:29]1[CH:30]=[CH:31][C:26]([O:3][CH2:4][CH2:5][C@@H:6]2[CH2:8][C@@H:7]2[CH:9]2[CH2:14][CH2:13][N:12]([C:15]([O:17][CH2:18][C:19]3[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=3)=[O:16])[CH2:11][CH2:10]2)=[N:27][CH:28]=1)(=[O:34])=[O:33]

Participants

7

Reactant 3

HCID 24758Sodium hydrideHCID 98994832-Bromo-5-(methylsulfonyl)pyridineHCID 70856295Benzyl 4-((1R,2S)-2-(2-hydroxyethyl)cyclopropyl)piperidine-1-carboxylate

Product 1

HCID 70819038benzyl 4-((1R,2S)-2-(2-(5-(methylsulfonyl)pyridin-2-yloxy)ethyl)cyclopropyl)piperidine-1-carboxylate

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

Sodium hydride (424 mg, 60% dispersion in mineral oil, 10.6 mmol) was added to a solution of benzyl 4-((1R,2S)-2-(2-hydroxyethyl)cyclopropyl)piperidine-1-carboxylate (1.07 g, 3.53 mmol) in N,N-dimethylformamide (10 mL) under nitrogen at RT. The mixture was stirred for 30 min at RT and 2-bromo-5-(methylsulfonyl)pyridine (1.25 g, 5.30 mmol) was added. The mixture was stirred overnight, diluted with ethyl acetate (100 mL) and water (50 mL), and the layers were separated. The organic layer was washed with brine (2×25 mL), dried (Na2SO4), filtered, and concentrated under reduced pressure. The residue was purified by silica gel chromatography (40 g RediSep, eluted with a gradient of hexanes to ethyl acetate, 9:1, 200 mL; 4:1, 500 mL; 1:1, 1 L) to provide the title compound as a light yellow oil. 1H NMR (300 MHz, CDCl3) δ 8.71 (dd, J=0.5, 2.5 Hz, 1H), 8.03 (dd, J=2.5, 8.7 Hz, 1H), 7.40-7.28 (m, 5H), 6.84 (dd, J=0.6, 8.7 Hz, 1H), 5.13 (s, 2H), 4.48 (t, J=7.2 Hz, 2H), 4.30-4.10 (m, 2H), 3.07 (s, 3H), 2.90-2.60 (m, 2H), 2.20-2.00 (m, 1H), 1.85-1.65 (m, 2H), 1.60-1.45 (m, 1H), 1.45-1.20 (m, 2H), 1.10-0.85 (m, 2H), 0.75-0.50 (m, 2H), −0.12 (q, J=5.1 Hz, 1H). MS (Multimode) m/z 459 [M+H]+.

Workup

  1. stirringThe mixture was stirred overnight
  2. customthe layers were separated
  3. washThe organic layer was washed with brine (2×25 mL)
  4. dry with materialdried (Na2SO4)
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by silica gel chromatography (40 g RediSep
  8. washeluted with a gradient of hexanes to ethyl acetate, 9:1, 200 mL

Sources & evidence

ORD record
ord-3bca511455b6452d8a20609238a91537
Source dataset
uspto-grants-2015_02
Patent number
US08957062B2

Reaction notes

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