tert-Butanol → HCID 69924378, compound

HRID 1005988Notes

Reaction equation

HRID 1005988 reaction equation
[CH3:1][C:2]1[N:7]=[C:6]([O:8][C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=2[CH3:15])[C:5](C(O)=O)=[CH:4][N:3]=1.C([N:21]([CH2:24]C)CC)C.[C:26]([OH:30])([CH3:29])([CH3:28])[CH3:27].C1C[O:34]CC1>>[C:26]([O:30][C:24](=[O:34])[NH:21][C:5]1[C:6]([O:8][C:9]2[CH:14]=[CH:13][CH:12]=[CH:11][C:10]=2[CH3:15])=[N:7][C:2]([CH3:1])=[N:3][CH:4]=1)([CH3:29])([CH3:28])[CH3:27]

Participants

5

Reactant 4

HCID 6386tert-ButanolHCID 8028TetrahydrofuranHCID 8471TriethylamineHCID 226742712-Methyl-4-(2-methylphenoxy)-5-pyrimidinecarboxylic acid

Product 1

HCID 69924378HCID 69924378, compoundYield 56%

Procedure

To a solution of 2.50 g (10.24 mmol) 2-methyl-4-o-tolyloxy-pyrimidine-5-carboxylic acid, 1.43 ml triethylamine (10.24 mmol) and 1.9 ml (20.4 mmol) t-butanol in 50 ml THF, 2.2 ml (10.24 mmol) diphenylphosporylazide were added and the resulting solution heated at reflux for 12 hrs. After evaporation of the solvent, the residue was distributed between CH2Cl2 and H2O. The aquoeus phase was extracted twice with 80 ml CH2Cl2. The combined organic layers were dried (Na2SO4), filtered and evaporated. The residue was purified by chromatography (SiO2, CH2Cl2/MeOH 40:1) to give 1.83 g (56%) (2-methyl-4-o-tolyloxy-pyrimidin-5-yl)-carbamic acid tert.-butyl ester as a colorless solid, MS (ISP): 316.3 (M+H)+.

Workup

  1. temperaturethe resulting solution heated
  2. temperatureat reflux for 12 hrs
  3. customAfter evaporation of the solvent
  4. extractionThe aquoeus phase was extracted twice with 80 ml CH2Cl2
  5. dry with materialThe combined organic layers were dried (Na2SO4)
  6. filtrationfiltered
  7. customevaporated
  8. customThe residue was purified by chromatography (SiO2, CH2Cl2/MeOH 40:1)

Sources & evidence

ORD record
ord-9b01b11a6b904658af963ffc9c386803
Source dataset
uspto-grants-2004_09
Patent number
US06787539B2

Reaction notes

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