Citric Acid → 2-[2-[Isobutyl-(4-trifluoromethyl-phenyl)-amino]-6-(4-trifluoromethyl-phenyl)-pyridin-4-yl]-4-methyl-pentanoic acid

HRID 2427888Notes

Reaction equation

HRID 2427888 reaction equation
C[O:2][C:3](=[O:40])[CH:4]([C:9]1[CH:14]=[C:13]([C:15]2[CH:20]=[CH:19][C:18]([C:21]([F:24])([F:23])[F:22])=[CH:17][CH:16]=2)[N:12]=[C:11]([N:25]([CH2:36][CH:37]([CH3:39])[CH3:38])[C:26]2[CH:31]=[CH:30][C:29]([C:32]([F:35])([F:34])[F:33])=[CH:28][CH:27]=2)[CH:10]=1)[CH2:5][CH:6]([CH3:8])[CH3:7].C(O)(=O)CC(CC(O)=O)(C(O)=O)O>[OH-].[Na+].C1COCC1>[CH2:36]([N:25]([C:26]1[CH:31]=[CH:30][C:29]([C:32]([F:35])([F:33])[F:34])=[CH:28][CH:27]=1)[C:11]1[CH:10]=[C:9]([CH:4]([CH2:5][CH:6]([CH3:8])[CH3:7])[C:3]([OH:40])=[O:2])[CH:14]=[C:13]([C:15]2[CH:20]=[CH:19][C:18]([C:21]([F:23])([F:24])[F:22])=[CH:17][CH:16]=2)[N:12]=1)[CH:37]([CH3:38])[CH3:39]

Participants

5

Reactant 2

HCID 311Citric AcidHCID 591617342-[2-[Isobutyl-(4-trifluoromethyl-phenyl)-amino]-6-(4-trifluoromethyl-phenyl)-pyridin-4-yl]-4-methyl-pentanoic acid methyl ester

Product 1

HCID 451014302-[2-[Isobutyl-(4-trifluoromethyl-phenyl)-amino]-6-(4-trifluoromethyl-phenyl)-pyridin-4-yl]-4-methyl-pentanoic acidYield 72.4%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 14798Sodium HydroxideSolvent

Procedure

A solution of 2-[2-[isobutyl-(4-trifluoromethyl-phenyl)-amino]-6-(4-trifluoromethyl-phenyl)-pyridin-4-yl]-4-methyl-pentanoic acid methyl ester (40 mg, 0.07 mmol) in NaOH (1N, 0.5 mL) and THF (3 mL) was stirred at 40° C. overnight. The mixture was cooled to room temperature, acidified with 10% citric acid, and extracted with CH2Cl2 (3×). The organic layer was washed with brine, dried over Na2SO4, filtered and evaporated. The residue was purified by chromatography (5-20% ethyl acetate in CH2Cl2) to give the product as a white solid (28 mg, 71%). 1H NMR (300 MHz, CDCl3) δ 8.11 (d, J=8.29 Hz, 2H), 7.70 (d, J=8.29 Hz, 2H), 7.57-7.67 (m, 2H), 7.38 (d, J=8.29 Hz, 2H), 7.18 (s, 1H), 6.57 (s, 1H), 3.96 (d, J=7.54 Hz, 2H), 3.55 (t, J=7.54 Hz, 1H), 2.07-2.23 (m, 1H), 1.83-1.95 (m, 1H), 1.65 (dt, J=7.06, 13.75 Hz, 1H), 1.52 (dd, J=6.59, 13.37 Hz, 1H), 0.97 (d, J=6.78 Hz, 6H), 0.90 (dd, J=4.52, 6.40 Hz, 6H). MS m/e 553.3 (M+H).

Workup

  1. extractionextracted with CH2Cl2 (3×)
  2. washThe organic layer was washed with brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. customevaporated
  6. customThe residue was purified by chromatography (5-20% ethyl acetate in CH2Cl2)

Sources & evidence

ORD record
ord-e98a6fe3af93449d87bbdeb3111c7e49
Source dataset
uspto-grants-2011_06
Patent number
US07968725B2

Reaction notes

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