Hydrochloric Acid → 1-Benzyl-5-hydroxy-2-oxo-3-(4-trifluoromethyl-phenyl)-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

HRID 920062Notes

Reaction equation

HRID 920062 reaction equation
[CH3:1][O:2][C:3]([C:5]1[C:6]([OH:24])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:10](=[O:22])[C:9](Br)=[CH:8]2)=[O:4].[F:25][C:26]([F:37])([F:36])[C:27]1[CH:32]=[CH:31][C:30](B(O)O)=[CH:29][CH:28]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+].Cl>C1(C)C=CC=CC=1.CC([O-])=O.CC([O-])=O.[Pd+2].COC1C=CC=C(OC)C=1C1C=CC=CC=1P(C1CCCCC1)C1CCCCC1.CCOC(C)=O.O>[CH3:1][O:2][C:3]([C:5]1[C:6]([OH:24])=[C:7]2[C:12](=[CH:13][N:14]=1)[N:11]([CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:10](=[O:22])[C:9]([C:30]1[CH:31]=[CH:32][C:27]([C:26]([F:37])([F:36])[F:25])=[CH:28][CH:29]=1)=[CH:8]2)=[O:4]

Participants

10

Reactant 4

HCID 313Hydrochloric AcidHCID 62657Potassium Phosphate, TribasicHCID 27343894-(Trifluoromethyl)phenylboronic acidHCID 682974771-Benzyl-3-bromo-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

Product 1

HCID 682971661-Benzyl-5-hydroxy-2-oxo-3-(4-trifluoromethyl-phenyl)-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl esterYield 65.2%

Reagents, catalysts & solvents 5

HCID 167845palladium(II) acetateCatalystHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylCatalystHCID 962WaterSolvent2×HCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
105 °C

Procedure

A mixture of 1-benzyl-3-bromo-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (220 mg, 0.57 mmol), 4-(trifluoromethyl)phenylboronic acid (161 mg, 0.85 mmol), K3PO4 (240 mg, 1.13 mmol), H2O (20 mg, 1.13 mmol), SPhos (12 mg, 0.028 mmol) and Pd(OAc)2 (12 mg, 0.017 mmol) in toluene (10 mL) was heated at 105° C. under nitrogen atmosphere for 20 h. After the mixture was cooled to r.t., water and EtOAc were added. 1 M HCl was added until pH was about 3, and the aqueous layer was extracted with additional EtOAc. The organic layers were combined, dried over MgSO4 and concentrated. The crude product was purified by silica gel chromatography (5-50% EtOAc/hexanes+1% AcOH) to give 169 mg of the title compound as a yellow solid. MS: (+) m/z 455.34 (M+1).

Workup

  1. temperatureAfter the mixture was cooled to r.t.
  2. extractionthe aqueous layer was extracted with additional EtOAc
  3. dry with materialdried over MgSO4
  4. concentrationconcentrated
  5. customThe crude product was purified by silica gel chromatography (5-50% EtOAc/hexanes+1% AcOH)

Sources & evidence

ORD record
ord-75cb43e3c76245a0bffe1eeb0c56fc09
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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