Acetic Acid → 2-((4-(2-Nitroethyl)benzyl)oxy)pyridine

HRID 1891514Notes

Reaction equation

HRID 1891514 reaction equation
[N+:1](/[CH:4]=[CH:5]/[C:6]1[CH:19]=[CH:18][C:9]([CH2:10][O:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][N:13]=2)=[CH:8][CH:7]=1)([O-:3])=[O:2].C(O)(=O)C.[BH4-].[Na+]>CS(C)=O>[N+:1]([CH2:4][CH2:5][C:6]1[CH:19]=[CH:18][C:9]([CH2:10][O:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][N:13]=2)=[CH:8][CH:7]=1)([O-:3])=[O:2]

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 4311764Sodium borohydride2×HCID 58076258(E)-2-((4-(2-Nitrovinyl)benzyl)oxy)pyridine

Product 1

HCID 580762662-((4-(2-Nitroethyl)benzyl)oxy)pyridineYield 77.1%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

To a solution of 2-(4-((E)-2-nitro-vinyl)-benzyloxy)-pyridine (21.0 g, 81.9 mmol) described in Manufacturing Example 2-1-3, acetic acid (21 mL) in dimethyl sulfoxide (200 mL) was added sodium borohydride (4.96 g, 131 mmol) at room temperature while cooling appropriately. After addition of sodium borohydride, the cooling bath was removed, followed by stirring for 15 minutes at room temperature. The reaction solution was partitioned into water and ethyl acetate. The ethyl acetate layer was washed with water twice and with saturated aqueous sodium chloride once, and dried over anhydrous magnesium sulfate, and the solvent was evaporated under a reduced pressure. The residue was purified by NH silica gel column chromatography (ethyl acetate:heptane=1:3) to obtain the title compound (16.3 g, 77.1%).

Workup

  1. temperaturewhile cooling appropriately
  2. customthe cooling bath was removed
  3. customThe reaction solution was partitioned into water and ethyl acetate
  4. washThe ethyl acetate layer was washed with water twice
  5. dry with materialwith saturated aqueous sodium chloride once, and dried over anhydrous magnesium sulfate
  6. customthe solvent was evaporated under a reduced pressure
  7. customThe residue was purified by NH silica gel column chromatography (ethyl acetate:heptane=1:3)

Sources & evidence

ORD record
ord-10a9f7fb66354055ae3bd93c46680c44
Source dataset
uspto-grants-2013_08
Patent number
US08507530B2

Reaction notes

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