Methyl 3-aminocrotonate → 2-Methyl-6-(4-trifluoromethyl-phenyl)-nicotinic Acid Methyl Ester

HRID 1242286Notes

Reaction equation

HRID 1242286 reaction equation
Cl.CN(C)[CH2:4][CH2:5][C:6]([C:8]1[CH:13]=[CH:12][C:11]([C:14]([F:17])([F:16])[F:15])=[CH:10][CH:9]=1)=O.[CH3:19][O:20][C:21](=[O:26])/[CH:22]=[C:23](\[NH2:25])/[CH3:24]>CC(O)=O>[CH3:19][O:20][C:21](=[O:26])[C:22]1[CH:4]=[CH:5][C:6]([C:8]2[CH:9]=[CH:10][C:11]([C:14]([F:15])([F:16])[F:17])=[CH:12][CH:13]=2)=[N:25][C:23]=1[CH3:24]

Participants

4

Reactant 2

HCID 643918Methyl 3-aminocrotonateHCID 21935704HCID 21935704, compound

Product 1

HCID 670722692-Methyl-6-(4-trifluoromethyl-phenyl)-nicotinic Acid Methyl Ester

Reagents, catalysts & solvents 1

HCID 176Acetic AcidSolvent

Procedure

4.59 g (16.3 mmol) of the above prepared 3-dimethylamino-1-(4-trifluoromethyl-phenyl)-propan-1-one hydrochloride and 1.86 g (1.0 eq.) of 3-aminocrotonic acid methyl ester was dissolved in 50 ml of AcOH and heated to reflux for 4 h. After cooling, the bulk of the solvent was evaporated i. V., the residue dissolved in AcOEt, and washed with water and brine. Drying over sodium sulfate, evaporation of the solvents and flash chromatography (SiO2, hexane/AcOEt=8/2) delivered finally 2.40 g of the title compound as light yellow waxy solid.

Workup

  1. temperatureheated
  2. temperatureto reflux for 4 h
  3. temperatureAfter cooling
  4. customthe bulk of the solvent was evaporated i
  5. dissolution, the residue dissolved in AcOEt
  6. washwashed with water and brine
  7. dry with materialDrying over sodium sulfate, evaporation of the solvents and flash chromatography (SiO2, hexane/AcOEt=8/2)

Sources & evidence

ORD record
ord-6cebd920c5834115b50eccd14654eefe
Source dataset
uspto-grants-2006_10
Patent number
US07115611B2

Reaction notes

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