Methyl iodide → HCID 131721171, compound

HRID 1418305Notes

Reaction equation

HRID 1418305 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([CH3:8])[C:5]([OH:9])=[CH:4][C:3]=1[N:10]1[C:18](=[O:19])[C:13]2=[CH:14][CH2:15][CH2:16][CH2:17][N:12]2[C:11]1=[O:20].CI.[C:23](=O)([O-])[O-].[K+].[K+].[Cl-].[NH4+]>C(#N)C>[Cl:1][C:2]1[CH:7]=[C:6]([CH3:8])[C:5]([O:9][CH3:23])=[CH:4][C:3]=1[N:10]1[C:18](=[O:19])[C:13]2=[CH:14][CH2:15][CH2:16][CH2:17][N:12]2[C:11]1=[O:20]

Participants

6

Reactant 4

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 25517Ammonium ChlorideHCID 131721169HCID 131721169, compound

Product 1

HCID 131721171HCID 131721171, compoundYield 64.6%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

An acetonitrile (10 mL) solution of 2-(2-chloro-4-methyl-5-hydroxyphenyl)-5,6-dihydroimidazo [1,5-a] pyridine-1,3[2H, 7H]-dione (0.34 g, 1.11 mmol), methyliodide (0.08 mL, 1.22 mmol) and potassium carbonate (0.15 g, 1.11 mmol) was stirred for 30 minutes under reflux. A saturated ammonium chloride solution (20 mL) was added to the resulting mixture and the organic layer was separated. The aqueous layer was extracted with diethyl ether (10 mL×2 times), and the organic layer combined was washed with a saturated sodium chloride solution (40 mL) and dried over anhydrous magnesium sulfate. After removal of magnesium sulfate by filtration, the filtrate was evaporated to give crude product, which was purified by silica gel column (Wakogel C-200, ethyl acetate/hexane=1/2) to obtain a white solid of 2-(2-chloro-4-methyl-5-methoxyphenyl)-5,6-dihydroimidazo [1,5-a] pyridine-1,3[2H, 7H]-dione (0.22 g, yield:61.1%).

Workup

  1. temperatureunder reflux
  2. customthe organic layer was separated
  3. extractionThe aqueous layer was extracted with diethyl ether (10 mL×2 times)
  4. washthe organic layer combined was washed with a saturated sodium chloride solution (40 mL)
  5. dry with materialdried over anhydrous magnesium sulfate
  6. customAfter removal of magnesium sulfate
  7. filtrationby filtration
  8. customthe filtrate was evaporated
  9. customto give crude product, which
  10. customwas purified by silica gel column (Wakogel C-200, ethyl acetate/hexane=1/2)

Sources & evidence

ORD record
ord-4ed70ad334184b3fb2a0e53e2d6e9da1
Source dataset
uspto-grants-1999_03
Patent number
US05883049

Reaction notes

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