Diisopropylethylamine → 3-[Ethyl(1-methylpiperidin-4-yl)amino]-2-methyl-N-{[6-methyl-2-oxo-4-(propan-2-yl)-1,2-dihydropyridin-3-yl]methyl}-5-(trifluoromethyl)benzamide

HRID 2208957Notes

Reaction equation

HRID 2208957 reaction equation
[CH2:1]([N:3]([CH:18]1[CH2:23][CH2:22][N:21]([CH3:24])[CH2:20][CH2:19]1)[C:4]1[C:5]([CH3:17])=[C:6]([CH:10]=[C:11]([C:13]([F:16])([F:15])[F:14])[CH:12]=1)[C:7](O)=[O:8])[CH3:2].Cl.[NH2:26][CH2:27][C:28]1[C:29](=[O:38])[NH:30][C:31]([CH3:37])=[CH:32][C:33]=1[CH:34]([CH3:36])[CH3:35].C1CN([P+](ON2N=NC3C=CC=CC2=3)(N2CCCC2)N2CCCC2)CC1.F[P-](F)(F)(F)(F)F.CCN(C(C)C)C(C)C>CS(C)=O>[CH2:1]([N:3]([CH:18]1[CH2:23][CH2:22][N:21]([CH3:24])[CH2:20][CH2:19]1)[C:4]1[C:5]([CH3:17])=[C:6]([CH:10]=[C:11]([C:13]([F:15])([F:16])[F:14])[CH:12]=1)[C:7]([NH:26][CH2:27][C:28]1[C:29](=[O:38])[NH:30][C:31]([CH3:37])=[CH:32][C:33]=1[CH:34]([CH3:35])[CH3:36])=[O:8])[CH3:2]

Participants

6

Reactant 4

HCID 81531DiisopropylethylamineHCID 2724699PyBOPHCID 708736533-[Ethyl(1-methylpiperidin-4-yl)amino]-2-methyl-5-(trifluoromethyl)benzoic acidHCID 867195293-(Aminomethyl)-6-methyl-4-(2-propyl)-1,2-dihydropyridin-2-one HCl salt

Product 1

HCID 708736863-[Ethyl(1-methylpiperidin-4-yl)amino]-2-methyl-N-{[6-methyl-2-oxo-4-(propan-2-yl)-1,2-dihydropyridin-3-yl]methyl}-5-(trifluoromethyl)benzamideYield 51%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

To a stirred solution of 3-[ethyl(1-methylpiperidin-4-yl)amino]-2-methyl-5-(trifluoromethyl)benzoic acid (crude material, ˜0.313 mmol) and 3-(aminomethyl)-6-methyl-4-(propan-2-yl)-1,2-dihydropyridin-2-one HCl salt (88.0 mg, 0.407 mmol) in DMSO (2.4 mL) was added PyBOP (244 mg, 0.470 mmol) and hunig base (164 ul, 0.939 mmol). The reaction mixture was stirred at rt for 16 hours. The reaction mixture was quenched with water and diluted with ethylacetate. The aqueous layer was extracted with dichloromethane. The combined organic layer was washed with brine, dried over Na2SO4, filtered and concentrated. The residue was purified by silica gel column chromatography (NH—SiO2 ethylacetate/MeOH=20/1+5% triethylamine). The crude compound was dissolved with DMSO, diluted with water. The precipitated solid was collected and triturated with ethylacetate/TBME/hexane to give the titled compound as a white solid (80.0 mg, 51% yield). 1H-NMR (400 MHz, CDCl3) δppm; 7.31 (s, 1H), 7.26 (s, 1H), 7.03-7.10 (m, 1H), 6.04 (s, 1H), 4.59 (d, J=6.0 Hz, 2H), 3.49-3.55 (m, 1H), 3.09 (q, J=6.8 Hz, 2H), 2.81-2.84 (m, 2H), 2.70-2.78 (m, 1H), 2.32 (s, 3H), 2.26 (s, 3H), 2.24 (s, 3H), 1.86-1.89 (m, 2H), 1.68-1.71 (m, 4H), 1.22 (d, J=6.4 Hz, 6H), 0.84 (t, J=6.8 Hz, 3H); MS (ES) [M+H] 507.2, [M+Na] 529.2; HPLC 97.7% purity.

Workup

  1. customThe reaction mixture was quenched with water
  2. additiondiluted with ethylacetate
  3. extractionThe aqueous layer was extracted with dichloromethane
  4. washThe combined organic layer was washed with brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified by silica gel column chromatography (NH—SiO2 ethylacetate/MeOH=20/1+5% triethylamine)
  9. dissolutionThe crude compound was dissolved with DMSO
  10. additiondiluted with water
  11. customThe precipitated solid was collected
  12. customtriturated with ethylacetate/TBME/hexane

Sources & evidence

ORD record
ord-0c98b817878c4341a478b51335ed5b78
Source dataset
uspto-grants-2016_06
Patent number
US09376422B2

Reaction notes

Loading…