Hydrochloric Acid → 5-[2-(Acetylamino)pyridin-4-yl]-3-(4-chlorobenzyl)-4-cyanothiophene-2-carboxylic acid

HRID 2401974Notes

Reaction equation

HRID 2401974 reaction equation
[C:1]([NH:4][C:5]1[CH:10]=[C:9]([C:11]2[S:15][C:14]([C:16]([O:18]CC)=[O:17])=[C:13]([CH2:21][C:22]3[CH:27]=[CH:26][C:25]([Cl:28])=[CH:24][CH:23]=3)[C:12]=2[C:29]#[N:30])[CH:8]=[CH:7][N:6]=1)(=[O:3])[CH3:2].[OH-].[Li+].Cl>O1CCCC1.O>[C:1]([NH:4][C:5]1[CH:10]=[C:9]([C:11]2[S:15][C:14]([C:16]([OH:18])=[O:17])=[C:13]([CH2:21][C:22]3[CH:23]=[CH:24][C:25]([Cl:28])=[CH:26][CH:27]=3)[C:12]=2[C:29]#[N:30])[CH:8]=[CH:7][N:6]=1)(=[O:3])[CH3:2]

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 3939Lithium HydroxideHCID 66747535Ethyl 5-[2-(acetylamino)pyridin-4-yl]-3-(4-chlorobenzyl)-4-cyanothiophene-2-carboxylate

Product 1

HCID 667479655-[2-(Acetylamino)pyridin-4-yl]-3-(4-chlorobenzyl)-4-cyanothiophene-2-carboxylic acidYield 78.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of ethyl 5-[2-(acetylamino)pyridin-4-yl]-3-(4-chlorobenzyl)-4-cyanothiophene-2-carboxylate (0.080 g, 0.18 mmol) in tetrahydrofuran (1.28 mL) and water (0.85 mL) was added lithium hydroxide (1.0M solution in water, 0.236 mL, 0.236 mmol). The reaction mixture was stirred at room temperature for 16 hours. The mixture was acidified to pH 6 using aqueous 1N HCl (0.300 mL). The mixture was extracted with ethyl acetate. The combined organic extracts were washed with brine, and then dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Column chromatography was performed to yield the title compound (0.058 g, 78%). LCMS: (FA) ES+, 412. 1H NMR (400 MHz, d6-DMSO) δ: 10.72 (s, 1H), 8.46-8.41 (m, 2H), 7.42-7.39 (m, 1H), 7.36-7.32 (m, 4H) 4.53 (s, 2H), 2.11 (s, 3H).

Workup

  1. extractionThe mixture was extracted with ethyl acetate
  2. washThe combined organic extracts were washed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-fad637b0a4574c8ea19d3c29c3b9f5d3
Source dataset
uspto-grants-2014_08
Patent number
US08796271B2

Reaction notes

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