Sodium Bicarbonate → (E)-3-[4-[2-(2-Fluorophenyl)vinyl]piperidino]methyl-2-methoxypyrazine

HRID 890073Notes

Reaction equation

HRID 890073 reaction equation
[CH3:1][O:2][C:3]1[C:4]([CH:9]=O)=[N:5][CH:6]=[CH:7][N:8]=1.[F:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1/[CH:18]=[CH:19]/[CH:20]1[CH2:25][CH2:24][NH:23][CH2:22][CH2:21]1.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].C(=O)(O)[O-].[Na+]>ClCCCl.C(O)(=O)C.C(OCC)(=O)C>[F:11][C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1/[CH:18]=[CH:19]/[CH:20]1[CH2:21][CH2:22][N:23]([CH2:9][C:4]2[C:3]([O:2][CH3:1])=[N:8][CH:7]=[CH:6][N:5]=2)[CH2:24][CH2:25]1

Participants

8

Reactant 4

HCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 158805973-Methoxypyrazine-2-carbaldehydeHCID 22248269(E)-4-[2-(2-fluorophenyl)vinyl]piperidine

Product 1

HCID 22248227(E)-3-[4-[2-(2-Fluorophenyl)vinyl]piperidino]methyl-2-methoxypyrazineYield 82%

Reagents, catalysts & solvents 3

HCID 111,2-DichloroethaneSolventHCID 176Acetic AcidSolventHCID 8857Ethyl AcetateSolvent

Procedure

After dissolving 186 mg of 3-methoxypyrazine-2-carboxaldehyde and 230 mg of (E)-4-[2-(2-fluorophenyl)vinyl]piperidine in 3 ml of 1,2-dichloroethane, 0.08 ml of acetic acid and 373 mg of sodium triacetoxyborohydride were added and the mixture was stirred overnight at room temperature. Saturated aqueous sodium bicarbonate solution was added to the reaction mixture and extraction was performed with ethyl acetate. The extract was washed with water and saturated brine in that order and dried over anhydrous magnesium sulfate, and then the solvent was distilled off under reduced pressure. The residue was purified by NH silica gel column chromatography (solvent: n-hexane/ethyl acetate) to obtain the title compound (296 mg, 82% yield).

Workup

  1. additionwere added
  2. washThe extract was washed with water and saturated brine in that order
  3. dry with materialdried over anhydrous magnesium sulfate
  4. distillationthe solvent was distilled off under reduced pressure
  5. customThe residue was purified by NH silica gel column chromatography (solvent: n-hexane/ethyl acetate)

Sources & evidence

ORD record
ord-045419be84f042938b33e1a0824effcb
Source dataset
uspto-grants-2006_02
Patent number
US06995144B2

Reaction notes

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