Methyl iodide → 3-[(E)-{[(6-aminopyridin-2-yl)methoxy]imino}(phenyl)methyl]-4-methyl-1,2,4-oxadiazol-5(4H)-one

HRID 2206859Notes

Reaction equation

HRID 2206859 reaction equation
[NH2:1][C:2]1[N:7]=[C:6]([CH2:8][O:9]/[N:10]=[C:11](/[C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)\[C:12]2[NH:16][C:15](=[O:17])[O:14][N:13]=2)[CH:5]=[CH:4][CH:3]=1.[C:24](=O)([O-])[O-].[K+].[K+].IC>CC#N.CN(C=O)C>[NH2:1][C:2]1[N:7]=[C:6]([CH2:8][O:9]/[N:10]=[C:11](/[C:18]2[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=2)\[C:12]2[N:16]([CH3:24])[C:15](=[O:17])[O:14][N:13]=2)[CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 1366263643-[(Z)-N-[(6-amino-2-pyridinyl)methoxy]-C-phenylcarbonimidoyl]-4H-1,2,4-oxadiazol-5-one

Product 1

HCID 894438773-[(E)-{[(6-aminopyridin-2-yl)methoxy]imino}(phenyl)methyl]-4-methyl-1,2,4-oxadiazol-5(4H)-oneYield 86.8%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6342AcetonitrileSolvent

Procedure

To a solution of 3-[(Z)-{[(6-aminopyridin-2-yl)methoxy]imino}(phenyl)methyl]-1,2,4-oxadiazol-5(4H)-one (1 g, 3.21 mmol, 1 eq.) in MeCN (50 ml) and DMF (10 ml) was added potassium carbonate (532 mg, 3.85 mmol, 1.2 eq.) followed by iodomethane (547 mg, 3.85 mmol, 1.2 eq.). The reaction was stirred at room temperature overnight. The reaction was quenched by addition of water and extracted with EtOAc (3×50 ml). The organics were combined, washed with aq. sat. NaCl, dried over MgSO4 and concentrated. The residue was purified by chromatography on silica gel to give 3-[(Z)-{[(6-aminopyridin-2-yl)methoxy]imino}(phenyl)methyl]-4-methyl-1,2,4-oxadiazol-5(4H)-one (906 mg, 85% yield) has a white solid.

Workup

  1. customThe reaction was quenched by addition of water
  2. extractionextracted with EtOAc (3×50 ml)
  3. washwashed with aq. sat. NaCl
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated
  6. customThe residue was purified by chromatography on silica gel

Sources & evidence

ORD record
ord-c3e29ded53464c6984d9ff8c7e414d39
Source dataset
uspto-grants-2016_06
Patent number
US09375010B2

Reaction notes

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