Benzenamine, 3,5-bis(trifluoromethyl)- → 3-Cyclopentyl-1-(2,6-dimethylphenyl)-5-oxo-pyrrolidine-3-carboxylic acid (3,5-bis-trifluoromethyl-phenyl)-amide

HRID 2068242Notes

Reaction equation

HRID 2068242 reaction equation
[Li]CCCC.[F:6][C:7]([F:20])([F:19])[C:8]1[CH:9]=[C:10]([CH:12]=[C:13]([C:15]([F:18])([F:17])[F:16])[CH:14]=1)[NH2:11].C[O:22][C:23]([C:25]1([CH:39]2[CH2:43][CH2:42][CH2:41][CH2:40]2)[CH2:29][C:28](=[O:30])[N:27]([C:31]2[C:36]([CH3:37])=[CH:35][CH:34]=[CH:33][C:32]=2[CH3:38])[CH2:26]1)=O>C1COCC1>[F:6][C:7]([F:19])([F:20])[C:8]1[CH:9]=[C:10]([NH:11][C:23]([C:25]2([CH:39]3[CH2:43][CH2:42][CH2:41][CH2:40]3)[CH2:29][C:28](=[O:30])[N:27]([C:31]3[C:36]([CH3:37])=[CH:35][CH:34]=[CH:33][C:32]=3[CH3:38])[CH2:26]2)=[O:22])[CH:12]=[C:13]([C:15]([F:16])([F:17])[F:18])[CH:14]=1

Participants

5

Reactant 3

HCID 9480Benzenamine, 3,5-bis(trifluoromethyl)-HCID 582188033-Cyclopentyl-1-(2,6-dimethylphenyl)-5-oxo-pyrrolidine-3-carboxylic acid methyl esterHCID 178418339Butyllithium

Product 1

HCID 510339033-Cyclopentyl-1-(2,6-dimethylphenyl)-5-oxo-pyrrolidine-3-carboxylic acid (3,5-bis-trifluoromethyl-phenyl)-amideYield 31%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

n-BuLi (2.5 M solution in hexanes, 456 μL, 1.14 mmol) was added to a solution of 3,5-bis-trifluoromethylaniline (177 μL, 0.1.14 mmol) in THF (3 mL) at room temperature. The resulting dark brown colored solution was stirred for 10 min at room temperature. A solution of 3-cyclopentyl-1-(2,6-dimethylphenyl)-5-oxo-pyrrolidine-3-carboxylic acid methyl ester (prepared from step a, 120 mg, 0.38 mmol) in THF (2 mL) was added and stirred for 2 h at 70° C. The reaction mixture was then purified by automated flash chromatography. Pure fractions were combined and concentrated under reduced pressure. The material was recrystallized from MeOH to obtain the desired product 3-cyclopentyl-1-(2,6-dimethylphenyl)-5-oxo-pyrrolidine-3-carboxylic acid (3,5-bis-trifluoromethyl-phenyl)-amide (60 mg, 31% yield) as white crystals. LC-MS: Rt (retention time): 3.32 min, MS: (ES) m/z 513.2 (M+H+). 1H NMR (400 MHz, CDCl3) δ 8.4 (s, 1H), 8.05 (s, 2H), 7.6 (s, 1H), 7.08-7.13 (m, 2H), 7.02-7.06 (m, 2H), 4.14 (d, 1H, J=11.5 Hz), 3.56 (d, 1H, J=11.5 Hz) 3.17 (d, 1H, J=16.9 Hz), 2.74 (d, 1H, J=16.9 Hz), 2.42-2.52 (m, 1H), 2.2 (s, 3H), 2.14 (s, 3H), 1.75-1.88 (m, 2H), 1.6-1.68 (m, 4H), 1.25-1.48 (m, 2H).

Workup

  1. additionwas added
  2. stirringstirred for 2 h at 70° C
  3. customThe reaction mixture was then purified by automated flash chromatography
  4. concentrationconcentrated under reduced pressure
  5. customThe material was recrystallized from MeOH

Sources & evidence

ORD record
ord-f6f1a5f76d9949dba06a2ce9dfbd5e69
Source dataset
uspto-grants-2012_10
Patent number
US08293925B2

Reaction notes

Loading…