3-Aminopyridine → Methyl 2-oxo-1-(pyridin-2-yl)-1,2-dihydropyridine-3-carboxylate

HRID 347540

Reaktionsgleichung

Reaktionsgleichung von HRID 347540
O=[C:2]1[C:7]([C:8]([O:10][CH3:11])=[O:9])=[CH:6][CH:5]=[CH:4][O:3]1.N[C:13]1[CH:14]=[N:15][CH:16]=[CH:17][CH:18]=1.CC[N:21]=C=NCCCN(C)C.Cl>CN(C=O)C.CN(C1C=CN=CC=1)C>[O:3]=[C:2]1[C:7]([C:8]([O:10][CH3:11])=[O:9])=[CH:6][CH:5]=[CH:4][N:21]1[C:16]1[CH:17]=[CH:18][CH:13]=[CH:14][N:15]=1

Komponenten

6

Edukt 3

HCID 100093-AminopyridineHCID 117704Methyl 2-oxo-2H-pyran-3-carboxylateHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride

Produkt 1

HCID 21081726Methyl 2-oxo-1-(pyridin-2-yl)-1,2-dihydropyridine-3-carboxylateAusbeute 72,4 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 142844-(Dimethylamino)pyridineKatalysatorHCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

To a solution of methyl 2-oxo-2H-pyran-3-carboxylate (462 mg, 3 mmol, Aldrich) in DMF (6 mL) at rt was added 3-aminopyridine (282 mg, 3 mmol). The reaction mixture was stirred at rt for 12 h and treated with EDCI.HCl (650 mg, 3.4 mmol) and DMAP (200 mg). The reaction mixture was stirred for 2.5 days at rt, and most of the DMF was removed in vacuo. The residue was purified by preparative HPLC to afford the desired product (500 mg, 72%) as a glassy material. 1H NMR (CDCl3) δ 8.53 (d, 1H, J=5.0 Hz), 8.20 (dd, 1H, J=9.2, 2.2 Hz), 8.06 (dd, 1H, J=6.0, 1.1 Hz), 7.89–7.82 (m, 2H), 7.32 (dd, 1H, J=6.6, 5.0 Hz), 6.36 (t, 1H, J=6.6 Hz), 3.86 (s, 3H); MS(ESI+) m/z 231.2 (M+H)+.

Aufarbeitung

  1. stirringThe reaction mixture was stirred for 2.5 days at rt
  2. custommost of the DMF was removed in vacuo
  3. customThe residue was purified by preparative HPLC

Quellen und Nachweise

ORD-Eintrag
ord-2e3a6493ad854b05b7f49e29a62bab58
Quelldatensatz
uspto-grants-2007_02
Patentnummer
US07173031B2

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