Water → ethyl 3-[3-ethoxy-1-[3-methoxy-4-[5-methyl-2-(2-thienyl)-4-oxazolylmethoxy]benzyl]-1H-pyrazol-4-yl]propionate

HRID 350179Notes

Reaction equation

HRID 350179 reaction equation
[CH2:1]([O:3][C:4]1[C:8]([CH2:9][CH2:10][C:11]([O:13][CH2:14][CH3:15])=[O:12])=[CH:7][N:6]([CH2:16][C:17]2[CH:22]=[CH:21][C:20]([OH:23])=[C:19]([O:24][CH3:25])[CH:18]=2)[N:5]=1)[CH3:2].[H-].[Na+].Cl[CH2:29][C:30]1[N:31]=[C:32]([C:36]2[S:37][CH:38]=[CH:39][CH:40]=2)[O:33][C:34]=1[CH3:35].O>CN(C)C=O>[CH2:1]([O:3][C:4]1[C:8]([CH2:9][CH2:10][C:11]([O:13][CH2:14][CH3:15])=[O:12])=[CH:7][N:6]([CH2:16][C:17]2[CH:22]=[CH:21][C:20]([O:23][CH2:29][C:30]3[N:31]=[C:32]([C:36]4[S:37][CH:38]=[CH:39][CH:40]=4)[O:33][C:34]=3[CH3:35])=[C:19]([O:24][CH3:25])[CH:18]=2)[N:5]=1)[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 24758Sodium hydrideHCID 50764914-(Chloromethyl)-5-methyl-2-(thiophen-2-yl)-1,3-oxazoleHCID 23021924ethyl 3-[3-ethoxy-1-(4-hydroxy-3-methoxybenzyl)-1H-pyrazol-4-yl]propionate

Product 1

HCID 69422233ethyl 3-[3-ethoxy-1-[3-methoxy-4-[5-methyl-2-(2-thienyl)-4-oxazolylmethoxy]benzyl]-1H-pyrazol-4-yl]propionateYield 66%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of ethyl 3-[3-ethoxy-1-(4-hydroxy-3-methoxybenzyl]-1H-pyrazol-4-yl]propionate (505 mg) in N,N-dimethylformamide (10 ml), sodium hydride (60%, oily, 58.0 mg) was added at 0° C., and then the solution was stirred at room temperature for 30 minutes. 4-Chloromethyl-5-methyl-2-(2-thienyl)oxazole (310 mg) was added to the reaction mixture, which was stirred at room temperature for one hour. The reaction mixture was poured into water, which was extracted with ethyl acetate. The ethyl acetate layer was washed with water, then, with saturated aqueous sodium chloride solution, and dried (MgSO4) and concentrated. The residue was subjected to silica gel column chromatography, and ethyl 3-[3-ethoxy-1-[3-methoxy-4-[5-methyl-2-(2-thienyl)-4-oxazolylmethoxy]benzyl]-1H-pyrazol-4-yl]propionate (500 mg, yield: 66%) was obtained as a colorless oily substance from the fraction eluted with ethyl acetate-hexane (1:1, volume ratio).

Workup

  1. stirringwas stirred at room temperature for one hour
  2. extractionwas extracted with ethyl acetate
  3. washThe ethyl acetate layer was washed with water
  4. dry with materialwith saturated aqueous sodium chloride solution, and dried (MgSO4)
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-cdce6311ae8e4018895f646452cc418d
Source dataset
uspto-grants-2007_02
Patent number
US07179823B1

Reaction notes

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