2-Amino-5-fluoropyridine → HCID 67274049, compound

HRID 2193532Notes

Reaction equation

HRID 2193532 reaction equation
[CH2:1]([O:3][C:4](=[O:21])[C:5]([C:10](=[O:20])[C:11]1[CH:16]=[C:15]([F:17])[C:14]([Cl:18])=[CH:13][C:12]=1Cl)=[CH:6]OCC)[CH3:2].[NH2:22][C:23]1[CH:28]=[CH:27][C:26]([F:29])=[CH:25][N:24]=1>C(O)C>[CH2:1]([O:3][C:4]([C:5]1[C:10](=[O:20])[C:11]2[C:12](=[CH:13][C:14]([Cl:18])=[C:15]([F:17])[CH:16]=2)[N:22]([C:23]2[CH:28]=[CH:27][C:26]([F:29])=[CH:25][N:24]=2)[CH:6]=1)=[O:21])[CH3:2]

Participants

4

Reactant 2

HCID 27377012-Amino-5-fluoropyridineHCID 53427585Ethyl 2-(2,4-dichloro-5-fluorobenzoyl)-3-ethoxyacrylate

Product 1

HCID 67274049HCID 67274049, compound

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A solution of 0.747 g of 2-(2,4-dichloro-5-fluoro-benzoyl)-3-ethoxy-acrylic acid ethyl ester (2.23 mmol) and 0.250 g of 2-amino-5-fluoropyridine (2.23 mmol) in 5 ml ethanol was stirred at reflux for 25 hrs. The reaction was monitored by TLC. The ethanol was evaporated and the last traces of ethanol were distilled from an azeotrope with a mixture of 10 ml heptane and 10 ml ethyl acetate. The yellow oil was dissolved in 10 ml of THF, reacted with 120 mg of a 50% NaH suspension in oil and stirred at reflux over night. The solvent was evaporated, the residue dissolved in dichloromethane/methanol 9:1, washed with water and brine, dried over Mg sulfate, filtered and evaporated. The residue was digested in ethyl acetate, and the solid filtered.

Workup

  1. temperatureat reflux for 25 hrs
  2. customThe ethanol was evaporated
  3. distillationthe last traces of ethanol were distilled from an azeotrope with a mixture of 10 ml heptane and 10 ml ethyl acetate
  4. dissolutionThe yellow oil was dissolved in 10 ml of THF
  5. customreacted with 120 mg of a 50% NaH suspension in oil
  6. temperatureat reflux over night
  7. customThe solvent was evaporated
  8. dissolutionthe residue dissolved in dichloromethane/methanol 9:1
  9. washwashed with water and brine
  10. dry with materialdried over Mg sulfate
  11. filtrationfiltered
  12. customevaporated
  13. filtrationthe solid filtered

Sources & evidence

ORD record
ord-27aa3e2d71484b9a9c25105a81dd238b
Source dataset
uspto-grants-2012_12
Patent number
US08329908B2

Reaction notes

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