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

HRID 920056Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 920056
[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].C([Sn](CCCC)(CCCC)[C:30]1[CH:31]=[N:32][CH:33]=[CH:34][CH:35]=1)CCC.CCOC(C)=O.Cl>CN(C=O)C.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.O>[CH3:1][O:2][C:3]([C:5]1[N:6]=[C:7]([C:30]2[CH:31]=[N:32][CH:33]=[CH:34][CH:35]=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]

Komponenten

8

Edukt 4

HCID 313Hydrochloric AcidHCID 8857Ethyl AcetateHCID 34838483-(Tributylstannyl)pyridineHCID 867141107-Benzyl-4-hydroxy-1-iodo-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carboxylic acid methyl ester

Produkt 1

HCID 682972247-Benzyl-4-hydroxy-8-oxo-1-pyridin-3-yl-7,8-dihydro-[2,7]naphthyridine-3-carboxylic acid methyl esterAusbeute 25,8 %

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 178418476HCID 178418476, VerbindungKatalysatorHCID 962WaterLösungsmittelHCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
120 °C

Versuchsvorschrift

A mixture of 7-benzyl-4-hydroxy-1-iodo-8-oxo-7,8-dihydro-[2,7]naphthyridine-3-carboxylic acid methyl ester (105 mg, 0.24 mmol), 3-tributylstannanyl-pyridine (133 mg, 0.36 mmol), and PdCl2(PPh3)2 (34 mg, 0.048 mmol) in 5 mL of DMF was heated at 120° C. for 2 h under N2 atmosphere. After the mixture was cooled to r.t., EtOAc and water were added. 1 M HCl was added until pH was about 3-4. The aqueous layer was extracted with additional EtOAc, and the combined organic layer was washed with water, dried over MgSO4 and concentrated. The crude product was purified by silica gel chromatography (5-100% EtOAc/hexanes+1% AcOH) to give 24 mg of the title compound. MS: (+) m/z 388.33 (M+1).

Aufarbeitung

  1. temperatureAfter the mixture was cooled to r.t.
  2. extractionThe aqueous layer was extracted with additional EtOAc
  3. washthe combined organic layer was washed with water
  4. dry with materialdried over MgSO4
  5. concentrationconcentrated
  6. customThe crude product was purified by silica gel chromatography (5-100% EtOAc/hexanes+1% AcOH)

Quellen und Nachweise

ORD-Eintrag
ord-0d560216bed3421ebf6b3b17282e9198
Quelldatensatz
uspto-grants-2016_03
Patentnummer
US09271970B2

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