Pyridine → HCID 178522158, compound

HRID 884985

Reaction equation

HRID 884985 reaction equation
[NH2:1][C:2]1[C:3]([OH:12])=[N:4][CH:5]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:7]=1.[C:13](O)(=[O:20])[C:14]1[CH:19]=[CH:18][N:17]=[CH:16][CH:15]=1.CCN=C=NCCCN(C)C.N1C=CC=CC=1>O>[OH:12][C:3]1[C:2]([NH:1][C:13](=[O:20])[C:14]2[CH:19]=[CH:18][N:17]=[CH:16][CH:15]=2)=[CH:7][C:6]([C:8]([F:11])([F:9])[F:10])=[CH:5][N:4]=1

Participants

6

Reactant 4

HCID 1049PyridineHCID 5922Isonicotinic AcidHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 23157873-Amino-5-(trifluoromethyl)-1,2-dihydropyridin-2-one

Product 1

HCID 178522158HCID 178522158, compoundYield 76.9%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of 1.0 g of 3-amino-2-hydroxy-5-trifluoromethylpyridine, 0.69 g of isonicotinic acid, 1.40 g of WSC and 7 ml of pyridine was stirred while heating at 80° C. for two hours. The reaction mixture was cooled to room temperature, and then water was added to the reaction mixture, followed by extraction with ethyl acetate three times. The combined organic layers were washed with water and a saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 1.22 g of N-[2-hydroxy-5-(trifluoromethyl)pyridin-3-yl]isonicotinamide.

Workup

  1. temperatureThe reaction mixture was cooled to room temperature
  2. extractionfollowed by extraction with ethyl acetate three times
  3. washThe combined organic layers were washed with water
  4. dry with materiala saturated sodium chloride solution, dried over anhydrous magnesium sulfate
  5. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-a8720431653f40bba33207ad54ce7aa3
Source dataset
uspto-grants-2012_08
Patent number
US08242133B2

Linked notes

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