Water → 3-{4-Chloro-2-fluoro-5-(3-butyn-2-yloxy)phenyl}-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazine

HRID 849950Notes

Reaction equation

HRID 849950 reaction equation
[Cl:1][C:2]1[C:7]([OH:8])=[CH:6][C:5]([C:9]2[C:10](=[O:20])[N:11]([CH3:19])[C:12]([C:15]([F:18])([F:17])[F:16])=[CH:13][N:14]=2)=[C:4]([F:21])[CH:3]=1.C(=O)([O-])[O-].[K+].[K+].Br[CH:29]([CH3:32])[C:30]#[CH:31].O>CN(C)C=O>[Cl:1][C:2]1[C:7]([O:8][CH:30]([C:29]#[CH:32])[CH3:31])=[CH:6][C:5]([C:9]2[C:10](=[O:20])[N:11]([CH3:19])[C:12]([C:15]([F:18])([F:17])[F:16])=[CH:13][N:14]=2)=[C:4]([F:21])[CH:3]=1

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 109424653-Bromo-1-butyneHCID 193655113-(4-Chloro-2-fluoro-5-hydroxyphenyl)-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazine2×

Product 1

HCID 193655373-{4-Chloro-2-fluoro-5-(3-butyn-2-yloxy)phenyl}-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazineYield 83%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
70 °C

Procedure

First, 100 mg of 3-(4-chloro-2-fluoro-5-hydroxyphenyl)-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazine (present compound 1-61) was dissolved in 0.60 ml of N,N-dimethylformamide, to which 64 mg of potassium carbonate and 45 mg of 3-bromo-1-butyne were added, and the mixture was stirred at 70° C. for 1 hour. After completion of the reaction, the reaction mixture was poured into water, followed by extraction with ethyl acetate. The organic layer was washed with saturated sodium chloride solution, dried with anhydrous magnesium sulfate, and concentrated. The residue was subjected to silica gel column chromatography, which afforded 96 mg (yield, 83%) of 3-{4-chloro-2-fluoro-5-(3-butyn-2-yloxy)phenyl}-1-methyl-6-trifluoromethyl-2-oxo-1,2-dihydropyrazine (present compound 1-157).

Workup

  1. additionwere added
  2. customAfter completion of the reaction
  3. extractionfollowed by extraction with ethyl acetate
  4. washThe organic layer was washed with saturated sodium chloride solution
  5. dry with materialdried with anhydrous magnesium sulfate
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-93f47211ab074f1aa1236e83d8062b6c
Source dataset
uspto-grants-2000_01
Patent number
US06015774

Reaction notes

Loading…