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

HRID 920064Notes

Reaction equation

HRID 920064 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][CH:30]=[CH:29][C:28]=1B(O)O.[O-]P([O-])([O-])=O.[K+].[K+].[K+].COC1C=CC=C(OC)C=1C1C=CC=CC=1P(C1CCCCC1)C1CCCCC1.Cl>C1(C)C=CC=CC=1.CC([O-])=O.CC([O-])=O.[Pd+2].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:28]1[CH:29]=[CH:30][CH:31]=[CH:32][C:27]=1[C:26]([F:37])([F:36])[F:25])=[CH:8]2)=[O:4]

Participants

10

Reactant 5

HCID 313Hydrochloric AcidHCID 62657Potassium Phosphate, TribasicHCID 27343872-(Trifluoromethyl)benzeneboronic acidHCID 112698722-Dicyclohexylphosphino-2',6'-dimethoxybiphenylHCID 682974771-Benzyl-3-bromo-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

Product 1

HCID 682974481-Benzyl-5-hydroxy-2-oxo-3-(2-trifluoromethyl-phenyl)-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl esterYield 30.5%

Reagents, catalysts & solvents 4

HCID 167845palladium(II) acetateCatalystHCID 962WaterSolvent2×HCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of 1-benzyl-3-bromo-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (100 mg, 0.26 mmol), 2-(trifluoromethyl)phenylboronic acid (73 mg, 0.39 mmol), K3PO4 (109 mg, 0.51 mmol), H2O (9.3 mg, 0.51 mmol), SPhos (5.3 mg, 0.013 mmol) and Pd(OAc)2 (5.2 mg, 0.0077 mmol) in toluene (5 mL) was heated at 100° 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 2, 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 36 mg of the title compound. MS: (+) m/z 455.28 (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-67b4bfefc3894e4bad08e95a2659266d
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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