Water → 7-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-2,3-dihydrobenzofuran-4-carboxylic acid

HRID 2364667Notes

Reaction equation

HRID 2364667 reaction equation
[CH:1]1([N:6]2[C:15]3[N:14]=[C:13]([NH:16][C:17]4[CH:18]=[CH:19][C:20]([C:26]([O:28]C)=[O:27])=[C:21]5[C:25]=4[O:24][CH2:23][CH2:22]5)[N:12]=[CH:11][C:10]=3[N:9]([CH3:30])[C:8](=[O:31])[C@H:7]2[CH2:32][CH3:33])[CH2:5][CH2:4][CH2:3][CH2:2]1.O>[OH-].[Li+].CO>[CH:1]1([N:6]2[C:15]3[N:14]=[C:13]([NH:16][C:17]4[CH:18]=[CH:19][C:20]([C:26]([OH:28])=[O:27])=[C:21]5[C:25]=4[O:24][CH2:23][CH2:22]5)[N:12]=[CH:11][C:10]=3[N:9]([CH3:30])[C:8](=[O:31])[C@H:7]2[CH2:32][CH3:33])[CH2:2][CH2:3][CH2:4][CH2:5]1

Participants

5

Reactant 2

HCID 962WaterHCID 68107956methyl 7-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-2,3-dihydrobenzofuran-4-carboxylate

Product 1

HCID 681074757-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-2,3-dihydrobenzofuran-4-carboxylic acidYield 97.7%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 3939Lithium HydroxideSolvent

Procedure

Methyl 7-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-2,3-dihydrobenzofuran-4-carboxylate 1p (5 g, 11 mmol) was dissolved in 180 mL mixture solution of 1 mol/L lithium hydroxide solution and methanol (V/V=1:1). The resulting mixture was heated to reflux for 3 hours with stirring. The reaction solution was added with 50 mL of water, concentrated under reduced pressure and extracted with ethyl acetate (50 mL×3). 1 M hydrochloric acid was added dropwise to adjust the aqueous phase pH to 2 resulting in the formation of precipitate. The precipitate was filtered, and dried to obtain the title compound 7-[[(7R)-8-cyclopentyl-7-ethyl-5-methyl-6-oxo-7H-pteridin-2-yl]amino]-2,3-dihydrobenzofuran-4-carboxylic acid 1q (4.70 g, yield: 97.0%) as a white solid.

Workup

  1. temperatureThe resulting mixture was heated
  2. temperatureto reflux for 3 hours
  3. concentrationconcentrated under reduced pressure
  4. extractionextracted with ethyl acetate (50 mL×3)
  5. addition1 M hydrochloric acid was added dropwise
  6. filtrationThe precipitate was filtered
  7. customdried

Sources & evidence

ORD record
ord-02a476baac46418188a623842ef4bb86
Source dataset
uspto-grants-2014_04
Patent number
US08691822B2

Reaction notes

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