4-Vinylpyridine → 5-(2-(4-Pyridinyl)vinyl)-3-(1-BOC-2-(S)-azetidinylmethoxy)pyridine

HRID 2305117Notes

Reaction equation

HRID 2305117 reaction equation
Br[C:2]1[CH:3]=[C:4]([O:8][CH2:9][C@@H:10]2[CH2:13][CH2:12][N:11]2[C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH:5]=[N:6][CH:7]=1.[CH:21]([C:23]1[CH:28]=[CH:27][N:26]=[CH:25][CH:24]=1)=[CH2:22].C1(C)C=CC=CC=1P(C1C=CC=CC=1C)C1C=CC=CC=1C>C(#N)C.C(N(CC)CC)C.C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[N:26]1[CH:27]=[CH:28][C:23]([CH:21]=[CH:22][C:2]2[CH:3]=[C:4]([O:8][CH2:9][C@@H:10]3[CH2:13][CH2:12][N:11]3[C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[CH:5]=[N:6][CH:7]=2)=[CH:24][CH:25]=1

Participants

7

Reactant 3

HCID 75024-VinylpyridineHCID 80271Tri-o-tolylphosphineHCID 10688713(S)-Tert-butyl 2-(((5-bromopyridin-3-YL)oxy)methyl)azetidine-1-carboxylate

Product 1

HCID 538525935-(2-(4-Pyridinyl)vinyl)-3-(1-BOC-2-(S)-azetidinylmethoxy)pyridineYield 69%

Reagents, catalysts & solvents 3

HCID 167845palladium(II) acetateCatalystHCID 6342AcetonitrileSolventHCID 8471TriethylamineSolvent

Procedure

To a solution of 5-bromo-3-(1-BOC-2-(S)-azetidinylmethoxy)pyridine from step 54b (1.03 g, 3.0 mmol) in acetonitrile (20 mL) and triethylamine (12.5 mL) was added 4-vinylpyridine (0.65 mL, 6 mmol), palladium acetate (125 mg, 0.56 mmol) and tri-o-tolylphosphine (625 mg). The mixture was heated at reflux for 16 hours. The solvent was removed, and the residue was washed with saturated sodium bicarbonate was added to free the amine, and the mixture was extracted with EtOAc, dried (MgSO4), and concentrated. The residue was chromatographed on a silica gel column, eluting with hexane:Et2O 1:2 to 0:1 to afford the title compound (760 mg, 69%). MS (CI/NH3) m/z 368 (M+H)+. 1H NMR (CDCl3, 300 MHz) δ 1.43 (s, 9H), 2.35 (m, 2H), 3.90 (m, 2H), 4.20 (m, 1H), 4.40 (m, 1H), 4.55 (m, 1H), 7.10 (m, 1H), 7.2 (m, 1H), 7.38 (m, 2H), 7.45 (br s, 1H), 8.29 (m, 1H), 8.37 (s, 1H), 8.61 (m, 2H).

Workup

  1. temperatureThe mixture was heated
  2. temperatureat reflux for 16 hours
  3. customThe solvent was removed
  4. washthe residue was washed with saturated sodium bicarbonate
  5. additionwas added
  6. extractionthe mixture was extracted with EtOAc
  7. dry with materialdried (MgSO4)
  8. concentrationconcentrated
  9. customThe residue was chromatographed on a silica gel column
  10. washeluting with hexane:Et2O 1:2 to 0:1

Sources & evidence

ORD record
ord-f29aa3d538b24a63b598c8ab87c33271
Source dataset
uspto-grants-2002_08
Patent number
US06437138B1

Reaction notes

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