Potassium Carbonate → 6-{(S)-3-methyl-1-[2-(4-trifluoromethyl-phenyl)-pyrimidin-5-yl]butylamino}-nicotinic acid methyl ester

HRID 2173861Notes

Reaction equation

HRID 2173861 reaction equation
Cl.[CH3:2][CH:3]([CH3:23])[CH2:4][C@H:5]([NH2:22])[C:6]1[CH:7]=[N:8][C:9]([C:12]2[CH:17]=[CH:16][C:15]([C:18]([F:21])([F:20])[F:19])=[CH:14][CH:13]=2)=[N:10][CH:11]=1.[CH3:24][O:25][C:26](=[O:34])[C:27]1[CH:32]=[CH:31][C:30](F)=[N:29][CH:28]=1.C([O-])([O-])=O.[K+].[K+]>N#N>[CH3:24][O:25][C:26](=[O:34])[C:27]1[CH:32]=[CH:31][C:30]([NH:22][C@H:5]([C:6]2[CH:7]=[N:8][C:9]([C:12]3[CH:17]=[CH:16][C:15]([C:18]([F:21])([F:20])[F:19])=[CH:14][CH:13]=3)=[N:10][CH:11]=2)[CH2:4][CH:3]([CH3:23])[CH3:2])=[N:29][CH:28]=1

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 13758765Methyl 6-fluoropyridine-3-carboxylateHCID 67980895(S)-3-methyl-1-[2-(4-trifluoromethyl-phenyl)-pyrimidin-5-yl]-butylamine hydrochloride

Product 1

HCID 679808636-{(S)-3-methyl-1-[2-(4-trifluoromethyl-phenyl)-pyrimidin-5-yl]butylamino}-nicotinic acid methyl esterYield 94.5%

Reagents, catalysts & solvents 1

HCID 947NitrogenSolvent

Conditions

Temperature
100 °C

Procedure

(S)-3-methyl-1-[2-(4-trifluoromethyl-phenyl)-pyrimidin-5-yl]-butylamine hydrochloride (31.33 g, 90.60 mmol) was combined with 6-fluoro-nicotinic acid methyl ester (16.9 g, 109 mmol) and K2CO3 (37.6 g, 272 mmol, 325 mesh) in a 500 mL N2-purged round bottom. Anhydrous dimethylformamide (115 mL) was added. The reaction was heated to 100° C. as a suspension. At 35 min another 3.00 g of 6-fluoro-nicotinic acid methyl ester was added. At 20 h, the reaction was placed in an ice bath and when the internal temperature was below room temperature sat. NH4Cl (500 mL) was added. This was stirred for a couple minutes in the bath and then the bath was removed and stirred at room temperature. Ethyl acetate (600 mL) and a small amount of water were added and the layers separated. The aqueous was extracted with ethyl acetate (150 mL) and the combined organics were washed with additional sat. NH4Cl (125 mL). The aqueous was back extracted with ethyl acetate (50 mL). The combined organics were dried over MgSO4. Purification was done by silica gel flash chromatography (ethyl acetate/heptane) to give impure 6-{(S)-3-methyl-1-[2-(4-trifluoromethyl-phenyl)-pyrimidin-5-yl]butylamino}-nicotinic acid methyl ester (38.07 g) as a pale yellow solid. 1H NMR (400 MHz, CDCl3, δ): 8.85 (s, 2H) 8.69 (d, J=1.6 Hz, 1H) 8.55 (d, J=8.2 Hz, 2H) 8.01 (dd, J=8.8, 2.1 Hz, 1H) 7.74 (d, J=8.4 Hz, 2H) 6.39 (d, J=8.8 Hz, 1H) 5.01 (q, J=6.9 Hz, 1H) 3.86 (s, 3H) 1.85-1.98 (m, 1H) 1.70-1.82 (m, 2H) 1.05 (d, J=6.2 Hz, 3H) 1.01 (d, J=6.0 Hz, 3H); MS (M+1): 445.3.

Workup

  1. custompurged round bottom
  2. additionAnhydrous dimethylformamide (115 mL) was added
  3. additionAt 35 min another 3.00 g of 6-fluoro-nicotinic acid methyl ester was added
  4. customthe reaction was placed in an ice bath
  5. customwas below room temperature
  6. additionwas added
  7. customthe bath was removed
  8. stirringstirred at room temperature
  9. additionEthyl acetate (600 mL) and a small amount of water were added
  10. customthe layers separated
  11. extractionThe aqueous was extracted with ethyl acetate (150 mL)
  12. washthe combined organics were washed with additional sat. NH4Cl (125 mL)
  13. extractionThe aqueous was back extracted with ethyl acetate (50 mL)
  14. dry with materialThe combined organics were dried over MgSO4
  15. customPurification

Sources & evidence

ORD record
ord-922141e4622d43d39163094eaa8a945e
Source dataset
uspto-grants-2015_06
Patent number
US09056834B2

Reaction notes

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