N-bromobutanimide → 2-Bromo-4-chloro-1,5-dimethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid ethyl ester

HRID 1510511Notes

Reaction equation

HRID 1510511 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[C:11]([Cl:12])=[C:10]([CH3:13])[C:9](=[O:14])[N:8]([CH3:15])[CH:7]=1)=[O:5])[CH3:2].C1C(=O)N([Br:23])C(=O)C1>CN(C=O)C.CCOC(C)=O>[CH2:1]([O:3][C:4]([C:6]1[C:11]([Cl:12])=[C:10]([CH3:13])[C:9](=[O:14])[N:8]([CH3:15])[C:7]=1[Br:23])=[O:5])[CH3:2]

Participants

5

Reactant 2

HCID 67184N-bromobutanimideHCID 11680224Ethyl 4-chloro-1,5-dimethyl-6-oxo-1,6-dihydropyridine-3-carboxylate

Product 1

HCID 666741602-Bromo-4-chloro-1,5-dimethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid ethyl ester

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 4-chloro-1,5-dimethyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid ethyl ester (1.00 equivalent) in DMF is added NBS (1.20 equivalents) at room temperature. After stirring for 16 hours at room temperature, the reaction mixture is diluted with EtOAc and washed with water. The organic layer is dried over MgSO4, filtered, and concentrated in vacuo to give the crude material that is purified by trituration or Hash column chromatography to afford the desired product as necessary.

Workup

  1. washwashed with water
  2. dry with materialThe organic layer is dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customto give the crude material that
  6. customis purified by trituration or Hash column chromatography

Sources & evidence

ORD record
ord-a3b83885c1d24ff09c3290e4da90b7c0
Source dataset
uspto-grants-2012_07
Patent number
US08211920B2

Reaction notes

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