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

HRID 1765726Notes

Reaction equation

HRID 1765726 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>[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

4

Reactant 2

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

Product 1

HCID 11234414[2-Fluoro-4-(8-hydroxy-2,2,4,4-tetramethyl-chroman-6-ylethynyl)-phenyl]-acetic acidYield 69%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

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 tetrahydrofaran (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-6acd7fdb277d4084abdb9f8c3f86a82d
Source dataset
uspto-grants-2007_06
Patent number
US07226951B2

Reaction notes

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