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

HRID 347539

Reaction equation

HRID 347539 reaction equation
O=[C:2]1[C:7]([C:8]([O:10][CH3:11])=[O:9])=[CH:6][CH:5]=[CH:4][O:3]1.[NH2:12][C:13]1[CH:14]=[N:15][CH:16]=[CH:17][CH:18]=1.CCN=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:12]1[C:13]1[CH:14]=[N:15][CH:16]=[CH:17][CH:18]=1

Participants

6

Reactant 3

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

Product 1

HCID 21081727Methyl 2-oxo-1-(pyridin-3-yl)-1,2-dihydropyridine-3-carboxylateYield 141.9%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6228DimethylformamideSolvent

Procedure

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 overnight at rt, treated with EDCI.HCl (650 mg, 3.4 mmol) and DMAP (200 mg), stirred for an additional 24 h, and concentrated in vacuo. The residue was purified by preparative HPLC to afford the desired product (980 mg, 95%) as a beige solid. 1H NMR (CDCl3) δ 13.00 (br s, 1H), 8.83 (br s, 1H), 8.74 (br s, 1H), 8.29 (dd, 1H, J=7.2, 1.7 Hz), 8.18 (d, 1H, J=8.3 Hz), 7.73 (dd, 1H, J=7.7, 5.0 Hz), 7.66 (dd, 1H, J=6.6, 1.6 Hz), 6.42 (t, 1H, J=7.1 Hz), 3.87 (s, 3H).

Workup

  1. stirringstirred for an additional 24 h
  2. concentrationconcentrated in vacuo
  3. customThe residue was purified by preparative HPLC

Sources & evidence

ORD record
ord-7978079b70154be585257d17e39c7f13
Source dataset
uspto-grants-2007_02
Patent number
US07173031B2

Linked notes

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