Potassium Carbonate → Methyl 4-(1,3-oxazol-5-yl)benzoate

HRID 31747Notes

Reaction equation

HRID 31747 reaction equation
[CH:1]([C:3]1[CH:12]=[CH:11][C:6]([C:7]([O:9][CH3:10])=[O:8])=[CH:5][CH:4]=1)=[O:2].C(=O)([O-])[O-].[K+].[K+].C1(C)C=CC(S([CH2:28][N+:29]#[C-:30])(=O)=O)=CC=1>CO>[O:2]1[C:1]([C:3]2[CH:12]=[CH:11][C:6]([C:7]([O:9][CH3:10])=[O:8])=[CH:5][CH:4]=2)=[CH:30][N:29]=[CH:28]1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 15294Methyl 4-FormylbenzoateHCID 161915Tosylmethyl isocyanide

Product 1

HCID 1477779Methyl 4-(1,3-oxazol-5-yl)benzoateYield 79.9%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

Methyl 4-formylbenzoate (Aldrich Chemical Co., St. Louis, Mo.) (5.0 g, 30.5 mmol), anhydrous potassium carbonate (4.55 g, 33 mmol) and p-toluenesulfonylmethyl isocyanide (TOSMIC, Aldrich Chemical Co.) (6.83 g, 30.5 mmol) were refluxed in methanol (100 ml) for 3.5 hours The mixture was then concentrated to dryness in vacuo. The residue was dissolved in ethyl acetate, washed twice with water, dried and concentrated in vacuo to give methyl 4-(1,3-oxazol-5-yl)benzoate as a beige solid (4.95 g).

Workup

  1. concentrationwas then concentrated to dryness in vacuo
  2. dissolutionThe residue was dissolved in ethyl acetate
  3. washwashed twice with water
  4. customdried
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-224de3bd21aa4efabe92a03a679a1615
Source dataset
uspto-grants-2008_09
Patent number
US07425557B2

Reaction notes

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