Lithium Hydroxide → [4-(5-tert-Butyl-3-ethynyl-4-isopropoxy-2-methyl-phenylethynyl)-phenyl]-acetic acid

HRID 2377474Notes

Reaction equation

HRID 2377474 reaction equation
C[O:2][C:3](=[O:30])[CH2:4][C:5]1[CH:10]=[CH:9][C:8]([C:11]#[C:12][C:13]2[CH:18]=[C:17]([C:19]([CH3:22])([CH3:21])[CH3:20])[C:16]([O:23][CH:24]([CH3:26])[CH3:25])=[C:15]([C:27]#[CH:28])[C:14]=2[CH3:29])=[CH:7][CH:6]=1.[OH-].[Li+]>CO.O1CCCC1>[C:19]([C:17]1[C:16]([O:23][CH:24]([CH3:26])[CH3:25])=[C:15]([C:27]#[CH:28])[C:14]([CH3:29])=[C:13]([C:12]#[C:11][C:8]2[CH:7]=[CH:6][C:5]([CH2:4][C:3]([OH:30])=[O:2])=[CH:10][CH:9]=2)[CH:18]=1)([CH3:20])([CH3:22])[CH3:21]

Participants

5

Reactant 2

HCID 3939Lithium HydroxideHCID 86600193[4-(5-tert-Butyl-3-ethynyl-4-isopropoxy-2-methyl-phenylethynyl)-phenyl]-acetic acid methyl ester2×

Product 1

HCID 58883466[4-(5-tert-Butyl-3-ethynyl-4-isopropoxy-2-methyl-phenylethynyl)-phenyl]-acetic acidYield 91%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 8028TetrahydrofuranSolvent

Procedure

A solution of [4-(5-tert-butyl-3-ethynyl-4-isopropoxy-2-methyl-phenylethynyl)-phenyl]-acetic acid methyl ester (Intermediate 145, 0.023 g, 0.057 mmol) in methanol (1.5 mL) and tetrahydrofuran (1.5 mL) was treated with 1M lithium hydroxide (0.5 mL, 1 mmol) and the resulting reaction mixture was stirred at ambient temperature for 45 minutes. 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 (0.020 g, 91%).

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-8c0584a6de8c4ac091aac42625937f30
Source dataset
uspto-grants-2008_12
Patent number
US07468391B2

Reaction notes

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