Dimethylformamide → HCID 54384707, compound

HRID 1387342Notes

Reaction equation

HRID 1387342 reaction equation
[CH3:1][N:2]([CH3:5])C=O.C(=O)([O-])[O-].[K+].[K+].[CH3:12][O:13][N:14]=[C:15]([C:32]1[NH:36][N:35]=[N:34][N:33]=1)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=1[CH2:22][O:23][C:24]1[CH:29]=[C:28]([CH3:30])[CH:27]=[CH:26][C:25]=1[CH3:31].S(OC)(OC)(=O)=O>CCOCC>[CH3:12][O:13][N:14]=[C:15]([C:32]1[N:36]([CH3:1])[N:35]=[N:34][N:33]=1)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=1[CH2:22][O:23][C:24]1[CH:29]=[C:28]([CH3:30])[CH:27]=[CH:26][C:25]=1[CH3:31].[CH3:12][O:13][N:14]=[C:15]([C:32]1[N:33]=[N:34][N:2]([CH3:5])[N:36]=1)[C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=1[CH2:22][O:23][C:24]1[CH:29]=[C:28]([CH3:30])[CH:27]=[CH:26][C:25]=1[CH3:31]

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 6497Dimethyl SulfateHCID 11430Potassium CarbonateHCID 178502648HCID 178502648, compound

Product 2

HCID 54384707HCID 54384707, compoundYield 37.9%HCID 54527829HCID 54527829, compoundYield 19%

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent

Procedure

N,N-Dimethylformamide (3 ml) and potassium carbonate (0.33 g, 2.4 mmol) were added to 2-(2,5-dimethylphenoxymethyl)phenyl 1H-tetrazol-5-yl ketone O-methyloxime (0.40 g, 1.2 -mmol), and the mixture was stirred at room temperature for 5 minutes. Then, dimethyl sulfate (0.23 g, 1.8 mmol) was added under ice-cooling, and the mixture was stirred at room temperature overnight. After completion of the reaction, ether (150 ml) was added, and the mixture was washed with brine (50 ml) twice. The ether layer was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel chromatography (ethyl acetatein-hexane) and recrystallized from ethyl acetate/n-hexane to give 2-(2,5-dimethylphenoxymethyl)phenyl 1-methyl-1H-tetrazol-5-yl ketone O-methyloxime as colorless crystals (0.16 g, 37.9%) [mp. 115.5-116.5° C.; 1H-NMR(CDCl3) δ ppm: 1.97(3H,s), 2.26(3H,s), 4.06(3H,s), 4.13(3H,s), 4.89(2H,s), 6.50(1H,s), 6.65(1H,d,J=7.9), 6.97(1H,d,J=7.9), 7.34-7.58(4H,m)] and 2-(2,5-dimethylphenoxymethyl)phenyl 2-methyl-2H-tetrazol-5-yl ketone O-methyloxime as colorless crystals (0.08 g, 19.0%) [mp. 131-132° C.; 1H-NMR(CDCl3) δ ppm: 2.12(3H,s), 2.24(3H,s), 4.09(3H,s), 4.34(3H,s), 4.96(2H,s), 6.54(1H,s), 6.64(1H,d,J=7.9), 6.98(1H,d,J=7.3), 7.29-7.53(3H,m), 7.69(1H,d,J=7.3)].

Workup

  1. temperaturecooling
  2. stirringthe mixture was stirred at room temperature overnight
  3. additionwas added
  4. washthe mixture was washed with brine (50 ml) twice
  5. dry with materialThe ether layer was dried over anhydrous magnesium sulfate
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by silica gel chromatography (ethyl acetatein-hexane)
  8. customrecrystallized from ethyl acetate/n-hexane

Sources & evidence

ORD record
ord-c530bbefab88496e9f2750e86c6a7d77
Source dataset
uspto-grants-2001_07
Patent number
US06268312B1

Reaction notes

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