Lithium Hydroxide → {8-Chloro-4-difluoromethoxy-3-[4-(2,2-dimethylpropionyl)benzyl]-2-ethylquinolin-5-yloxy}acetic acid

HRID 1922092Notes

Reaction equation

HRID 1922092 reaction equation
C[O:2][C:3](=[O:36])[CH2:4][O:5][C:6]1[CH:15]=[CH:14][C:13]([Cl:16])=[C:12]2[C:7]=1[C:8]([O:32][CH:33]([F:35])[F:34])=[C:9]([CH2:19][C:20]1[CH:25]=[CH:24][C:23]([C:26](=[O:31])[C:27]([CH3:30])([CH3:29])[CH3:28])=[CH:22][CH:21]=1)[C:10]([CH2:17][CH3:18])=[N:11]2.[OH-].[Li+]>O1CCCC1>[Cl:16][C:13]1[CH:14]=[CH:15][C:6]([O:5][CH2:4][C:3]([OH:36])=[O:2])=[C:7]2[C:12]=1[N:11]=[C:10]([CH2:17][CH3:18])[C:9]([CH2:19][C:20]1[CH:21]=[CH:22][C:23]([C:26](=[O:31])[C:27]([CH3:30])([CH3:28])[CH3:29])=[CH:24][CH:25]=1)=[C:8]2[O:32][CH:33]([F:35])[F:34]

Participants

4

Reactant 2

HCID 3939Lithium HydroxideHCID 67456452{8-Chloro-4-difluoromethoxy-3-[4-(2,2-dimethylpropionyl)benzyl]-2-ethylquinolin-5-yloxy}acetic acid methyl ester

Product 1

HCID 25096076{8-Chloro-4-difluoromethoxy-3-[4-(2,2-dimethylpropionyl)benzyl]-2-ethylquinolin-5-yloxy}acetic acidYield 57.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of {8-chloro-4-difluoromethoxy-3-[4-(2,2-dimethylpropionyl)benzyl]-2-ethylquinolin-5-yloxy}acetic acid methyl ester (0.071 g) in tetrahydrofuran (5.0 mL) was treated with 1.0 M aqueous lithium hydroxide solution (0.28 mL), and the resulting mixture was stirred at room temperature for 1 hour. The mixture was concentrated to low bulk under reduced pressure, acidified by the addition of 0.1 M aqueous hydrochloric acid solution and extracted with ethyl acetate. The combined extracts were dried over magnesium sulfate and then concentrated under reduced pressure. Purification of the residue by preparative reverse-phase HPLC gave title compound as a yellow solid (0.040 g).

Workup

  1. concentrationThe mixture was concentrated to low bulk under reduced pressure
  2. additionacidified by the addition of 0.1 M aqueous hydrochloric acid solution
  3. extractionextracted with ethyl acetate
  4. dry with materialThe combined extracts were dried over magnesium sulfate
  5. concentrationconcentrated under reduced pressure
  6. customPurification of the residue by preparative reverse-phase HPLC

Sources & evidence

ORD record
ord-4a14c83d668b4052956bd2a0131654d5
Source dataset
uspto-grants-2012_05
Patent number
US08173812B2

Reaction notes

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