Nitromethane → 5-(2-Nitro-ethyl)-2-phenylsulfanyl-pyridine

HRID 78084Notes

Reaction equation

HRID 78084 reaction equation
[C:1]1([S:7][C:8]2[N:13]=[CH:12][C:11]([CH:14]=O)=[CH:10][CH:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[N+:16]([CH3:19])([O-:18])=[O:17].C([O-])(=O)C.[NH4+].[BH4-].[Na+].C(=O)([O-])O.[Na+]>O.C(O)(=O)C.CS(C)=O>[N+:16]([CH2:19][CH2:14][C:11]1[CH:10]=[CH:9][C:8]([S:7][C:1]2[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=2)=[N:13][CH:12]=1)([O-:18])=[O:17]

Participants

9

Reactant 5

HCID 6375NitromethaneHCID 516892Sodium BicarbonateHCID 517165Ammonium AcetateHCID 4311764Sodium borohydrideHCID 542168266-Phenylsulfanyl-pyridine-3-carbaldehyde

Product 1

HCID 592551965-(2-Nitro-ethyl)-2-phenylsulfanyl-pyridineYield 30.1%

Reagents, catalysts & solvents 3

HCID 176Acetic AcidSolvent2×HCID 679Dimethyl SulfoxideSolventHCID 962WaterSolvent2×

Conditions

Temperature
100 °C

Procedure

To an acetic acid (10 mL) solution of 6-phenylsulfanyl-pyridine-3-carbaldehyde (583 mg, 2.71 mmol) described in Manufacturing Example 97-1-2 were added nitromethane (734 μL, 13.6 mmol) and ammonium acetate (418 mg, 5.42 mmol), and which was stirred for 4 hours 35 minutes at 100° C. under nitrogen atmosphere. Water was added to the reaction solution at room temperature, which was then extracted with ethyl acetate. The organic layer was separated, washed with saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure. To a dimethyl sulfoxide (10 mL) and acetic acid (1 mL) solution of the residue was added sodium borohydride (205 mg, 5.42 mmol), which was stirred for 55 minutes at room temperature. Sodium hydrogencarbonate and water were added to the reaction mixture at room temperature while cooling appropriately, which was then extracted with ethyl acetate. The organic layer was separated, washed with water and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and filtered. The filtrate was concentrated under a reduced pressure, and the residue was purified by NH silica gel column chromatography (heptane: ethyl acetate=1:1) to obtain the title compound (212 mg, 30%).

Workup

  1. extractionwhich was then extracted with ethyl acetate
  2. customThe organic layer was separated
  3. washwashed with saturated aqueous sodium chloride
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated under a reduced pressure
  7. stirringwas stirred for 55 minutes at room temperature
  8. temperaturewhile cooling appropriately
  9. extractionwhich was then extracted with ethyl acetate
  10. customThe organic layer was separated
  11. washwashed with water and saturated aqueous sodium chloride
  12. dry with materialdried over anhydrous magnesium sulfate
  13. filtrationfiltered
  14. concentrationThe filtrate was concentrated under a reduced pressure
  15. customthe residue was purified by NH silica gel column chromatography (heptane: ethyl acetate=1:1)

Sources & evidence

ORD record
ord-8d4107096d894cfe88849cad26a42b77
Source dataset
uspto-grants-2014_09
Patent number
US08841327B2

Reaction notes

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