Acetic Acid → 3-{2-Chloro-4-fluoro-5-[2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyridin-1-yl]phenoxy}-2-(methoxycarbonyl)methoxypyridine

HRID 1241299Notes

Reaction equation

HRID 1241299 reaction equation
[Cl:1][C:2]1[C:7]([O:8][C:9]2[C:10]([O:15][CH2:16][C:17]([O:19][CH3:20])=[O:18])=[N:11][CH:12]=[CH:13][CH:14]=2)=[CH:6][C:5]([NH:21][C:22](=[O:30])[CH2:23][C:24]([C:26]([F:29])([F:28])[F:27])=O)=[C:4]([F:31])[CH:3]=1.[C:32](O)(=[O:34])[CH3:33].[O-]C#N.[Na+]>O>[Cl:1][C:2]1[CH:3]=[C:4]([F:31])[C:5]([N:21]2[C:32](=[O:34])[CH:33]=[C:24]([C:26]([F:27])([F:28])[F:29])[CH2:23][C:22]2=[O:30])=[CH:6][C:7]=1[O:8][C:9]1[C:10]([O:15][CH2:16][C:17]([O:19][CH3:20])=[O:18])=[N:11][CH:12]=[CH:13][CH:14]=1

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 517096Sodium CyanateHCID 86593477N-[4-chloro-2-fluoro-5-{2-(methoxycarbonyl)methoxy-3-pyridyloxy}phenyl]tri fluoroacetoacetamide

Product 1

HCID 219335363-{2-Chloro-4-fluoro-5-[2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyridin-1-yl]phenoxy}-2-(methoxycarbonyl)methoxypyridine

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
50 °C

Procedure

To a mixture of 0.71 g of N-[4-chloro-2-fluoro-5-{2-(methoxycarbonyl)methoxy-3-pyridyloxy}phenyl]trifluoroacetoacetamide and 2 ml of acetic acid was added sodium cyanate, and the mixture was stirred at 50° C. for 1 hour and then at 110° C. for 1.5 hours. After cooling, water was poured into the reaction mixture, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium bicarbonate solution, saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and then concentrated. The residue was subjected to silica gel column chromatography to give 0.30 g of 3-{2-chloro-4-fluoro-5-[2,6-dioxo-4-(trifluoromethyl)-1,2,3,6-tetrahydropyridin-1-yl]phenoxy}-2-(methoxycarbonyl)methoxypyridine.

Workup

  1. waitat 110° C. for 1.5 hours
  2. temperatureAfter cooling
  3. extractionthe mixture was extracted with ethyl acetate
  4. washThe organic layer was washed with saturated aqueous sodium bicarbonate solution, saturated aqueous sodium chloride solution
  5. dry with materialdried over anhydrous magnesium sulfate
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-578b7c8485a24e02bb35992a4cb42775
Source dataset
uspto-grants-2006_10
Patent number
US07115544B2

Reaction notes

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