Hydrochloric Acid → HCID 136377238, compound

HRID 919905Notes

Reaction equation

HRID 919905 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].C([Sn](CCCC)(CCCC)[C:30]1[CH:35]=[N:34][CH:33]=[CH:32][N:31]=1)CCC.CCOC(C)=O.Cl>CN(C=O)C.[Cl-].[Na+].O.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[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:35]=[N:34][CH:33]=[CH:32][N:31]=1)=[CH:8]2)=[O:4]

Participants

8

Reactant 4

HCID 313Hydrochloric AcidHCID 8857Ethyl AcetateHCID 27373162-(Tributylstannyl)pyrazineHCID 682974771-Benzyl-3-bromo-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester

Product 1

HCID 136377238HCID 136377238, compoundYield 49%

Reagents, catalysts & solvents 3

HCID 178418476HCID 178418476, compoundCatalystHCID 6228DimethylformamideSolventHCID 57417360Sodium chloride; waterSolvent

Conditions

Temperature
120 °C

Procedure

A mixture of 1-benzyl-3-bromo-5-hydroxy-2-oxo-1,2-dihydro-[1,7]naphthyridine-6-carboxylic acid methyl ester (80 mg, 0.21 mmol), 2-tributylstannanyl-pyrazine (0.078 mL, 0.25 mmol), and PdCl2(PPh3)2 (29 mg, 0.041 mmol) in DMF (4 mL) was heated at 120° C. under nitrogen atmosphere for 2 h. After the mixture was cooled to r.t., brine (10 mL) and EtOAc (20 mL) were added. 1 M HCl was added with stirring until pH was about 3-4, and the organic layer was washed with water and brine, and dried over MgSO4. After evaporating the solvent, the crude product was purified by silica gel chromatography (20-100% EtOAc/hexanes+2% AcOH) to give 40 mg of the title compound as a light yellow solid. MS: (+) m/z 389.27 (M+1).

Workup

  1. temperatureAfter the mixture was cooled to r.t.
  2. washthe organic layer was washed with water and brine
  3. dry with materialdried over MgSO4
  4. customAfter evaporating the solvent
  5. customthe crude product was purified by silica gel chromatography (20-100% EtOAc/hexanes+2% AcOH)

Sources & evidence

ORD record
ord-2ae5b906bb694500baaf19c085369385
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

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