Hydrochloric Acid → 7-Benzyl-1-(5-fluoro-pyridin-3-yl)-4-hydroxy-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carboxylic acid methyl ester

HRID 919738Notes

Reaction equation

HRID 919738 reaction equation
[CH3:1][O:2][C:3]([C:5]1[N:6]=[C:7](I)[C:8]2[C:9](=[O:23])[N:10]([CH2:16][C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH:11]=[CH:12][C:13]=2[C:14]=1[OH:15])=[O:4].[F:25][C:26]1[CH:27]=[C:28](B(O)O)[CH:29]=[N:30][CH:31]=1.C([O-])([O-])=O.[Cs+].[Cs+].Cl>CN(C=O)C.[Cl-].[Na+].O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CCOC(C)=O>[CH3:1][O:2][C:3]([C:5]1[N:6]=[C:7]([C:28]2[CH:29]=[N:30][CH:31]=[C:26]([F:25])[CH:27]=2)[C:8]2[C:9](=[O:23])[N:10]([CH2:16][C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)[CH:11]=[CH:12][C:13]=2[C:14]=1[OH:15])=[O:4]

Participants

9

Reactant 4

HCID 313Hydrochloric AcidHCID 10796Cesium carbonateHCID 44717403(5-Fluoropyridin-3-yl)boronic acidHCID 867141107-Benzyl-4-hydroxy-1-iodo-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carboxylic acid methyl ester

Product 1

HCID 682973507-Benzyl-1-(5-fluoro-pyridin-3-yl)-4-hydroxy-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carboxylic acid methyl esterYield 55.7%

Reagents, catalysts & solvents 4

HCID 178418397HCID 178418397, compoundCatalystHCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolventHCID 57417360Sodium chloride; waterSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of 7-benzyl-4-hydroxy-1-iodo-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carboxylic acid methyl ester (117 mg, 0.27 mmol), 5-fluoropyridine-3-boronic acid (45 mg, 0.32 mmol), Cs2CO3 (175 mg, 0.54 mmol) and Pd(PPh3)4 (31 mg, 0.027 mmol) in 5 mL of DMF was heated at 100° C. for 16 h under N2 atmosphere. After the mixture was cooled to r.t., EtOAc (50 mL) and brine (10 mL) were added. 1 M HCl was added with stirring until pH was about 4. The aqueous layer was extracted with additional EtOAc, and the combined organic layer was dried over MgSO4 and concentrated. The crude product was purified by silica gel chromatography (5-70% EtOAc/hexanes) to give 61 mg of the title compound. MS: (+) m/z 405.97 (M+1).

Workup

  1. temperatureAfter the mixture was cooled to r.t.
  2. extractionThe aqueous layer was extracted with additional EtOAc
  3. dry with materialthe combined organic layer was dried over MgSO4
  4. concentrationconcentrated
  5. customThe crude product was purified by silica gel chromatography (5-70% EtOAc/hexanes)

Sources & evidence

ORD record
ord-ca6eb19d728f432ab4f917064ed4c365
Source dataset
uspto-grants-2016_03
Patent number
US09271970B2

Reaction notes

Loading…