Methyl iodide → Ethyl (E)-4-[2-(5,6,7,8-tetrahydro-3,5,5,8,8-pentamethylnaphthalen-2-yl)propen-1-yl]-1-methyl-2-imidazolecarboxylate

HRID 2259996Notes

Reaction equation

HRID 2259996 reaction equation
[CH3:1][C:2]1[C:3](/[C:16](/[CH3:34])=[CH:17]/[C:18]2[N:19]=[C:20]([C:29]([O:31][CH2:32][CH3:33])=[O:30])[N:21](S(=O)(=O)N(C)C)[CH:22]=2)=[CH:4][C:5]2[C:6]([CH3:15])([CH3:14])[CH2:7][CH2:8][C:9]([CH3:13])([CH3:12])[C:10]=2[CH:11]=1.CI.[C:37]([O-])([O-])=O.[K+].[K+]>CC(C)=O>[CH3:1][C:2]1[C:3](/[C:16](/[CH3:34])=[CH:17]/[C:18]2[N:19]=[C:20]([C:29]([O:31][CH2:32][CH3:33])=[O:30])[N:21]([CH3:37])[CH:22]=2)=[CH:4][C:5]2[C:6]([CH3:14])([CH3:15])[CH2:7][CH2:8][C:9]([CH3:12])([CH3:13])[C:10]=2[CH:11]=1

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 11430Potassium CarbonateHCID 86749151ethyl (E)-4-[2-(5,6,7,8-tetrahydro-3,5,5,8,8-pentamethylnaphthalen-2-yl)propen-1-yl]-1-(N,N-dimethylsulfamoyl)-2-imidazolecarboxylate2×

Product 1

HCID 86749152Ethyl (E)-4-[2-(5,6,7,8-tetrahydro-3,5,5,8,8-pentamethylnaphthalen-2-yl)propen-1-yl]-1-methyl-2-imidazolecarboxylateYield 50%

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

Ethyl (E)-4-[2-(5,6,7,8 -tetrahydro-3,5,5,8,8-pentamethylnaphthalen-2-yl)propen-1-yl]-1-N,N-dimethylsulfamoyl-2-imidazolecarboxylate (Compound 4, 70 mg, 0.18 mmol) was dissolved in acetone (10 mL) at room temperature and treated with methyl iodide (0.5 mL) and K2CO3 (350 mg). The suspension was stirred for 30 min, filtered through Celite and concentrated under reduced pressure. The residue was treated with water (5 mL) and the organic material was extracted with ethyl acetate, washed with brine, dried (MgSO4) and concentrated in vacuo. The residue was purified by flash chromatography on silica gel (hexanes/ethyl acetate=5:1) to give the title compound as a light yellow solid (35 mg, 50%).

Workup

  1. filtrationfiltered through Celite
  2. concentrationconcentrated under reduced pressure
  3. additionThe residue was treated with water (5 mL)
  4. extractionthe organic material was extracted with ethyl acetate
  5. washwashed with brine
  6. dry with materialdried (MgSO4)
  7. concentrationconcentrated in vacuo
  8. customThe residue was purified by flash chromatography on silica gel (hexanes/ethyl acetate=5:1)

Sources & evidence

ORD record
ord-fd5e7da44aa044d18d0eebdb8e1d0c7c
Source dataset
uspto-grants-1995_12
Patent number
US05475113

Reaction notes

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