Potassium Hydroxide → [2-Fluoro-4-(8-hydroxy-2,2,4,4-tetramethyl-chroman-6-ylethynyl)-phenyl]-acetic acid

HRID 1869857Notes

Reaction equation

HRID 1869857 reaction equation
C[O:2][C:3](=[O:29])[CH2:4][C:5]1[CH:10]=[CH:9][C:8]([C:11]#[C:12][C:13]2[CH:14]=[C:15]3[C:20](=[C:21]([OH:23])[CH:22]=2)[O:19][C:18]([CH3:25])([CH3:24])[CH2:17][C:16]3([CH3:27])[CH3:26])=[CH:7][C:6]=1[F:28].[OH-].[K+]>CO.O1CCCC1>[F:28][C:6]1[CH:7]=[C:8]([C:11]#[C:12][C:13]2[CH:14]=[C:15]3[C:20](=[C:21]([OH:23])[CH:22]=2)[O:19][C:18]([CH3:25])([CH3:24])[CH2:17][C:16]3([CH3:26])[CH3:27])[CH:9]=[CH:10][C:5]=1[CH2:4][C:3]([OH:29])=[O:2]

Participants

5

Reactant 2

HCID 14797Potassium HydroxideHCID 69075483[2-Fluoro-4-(8-hydroxy-2,2,4,4-tetramethyl-chroman-6-ylethynyl)phenyl]-acetic acid methyl ester2×

Product 1

HCID 11234414[2-Fluoro-4-(8-hydroxy-2,2,4,4-tetramethyl-chroman-6-ylethynyl)-phenyl]-acetic acidYield 127.3%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

A solution of [2-fluoro-4-(8-hydroxy-2,2,4,4-tetramethyl-chroman-6-ylethynyl)phenyl]-acetic acid methyl ester (Intermediate 21, 0.037 g, 0.0493 mmol) in methanol (2 mL) and tetrahydrofuran (1 mL) was treated with a 2M solution of potassium hydroxide (2 mL, 4 mmol) and the resulting reaction mixture was stirred at ambient temperature for 2 h. The volatiles were evaporated in vacuo to a residue that was neutralized with saturated aqueous ammonium chloride solution and extracted with ethyl acetate. The organic phase was washed with water and brine, and dried over anhydrous magnesium sulfate, filtered and evaporated in vacuo to afford the title product (0.024 g, 69%).

Workup

  1. customthe resulting reaction mixture
  2. customThe volatiles were evaporated in vacuo to a residue that
  3. extractionextracted with ethyl acetate
  4. washThe organic phase was washed with water and brine
  5. dry with materialdried over anhydrous magnesium sulfate
  6. filtrationfiltered
  7. customevaporated in vacuo

Sources & evidence

ORD record
ord-13d9d67ad95e43a2af2605dc5a43e53b
Source dataset
uspto-grants-2009_12
Patent number
US07638648B2

Reaction notes

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