N-bromobutanimide → 5-Bromo-2-(4-bromo-2-fluorophenylamino)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid

HRID 15943Notes

Reaction equation

HRID 15943 reaction equation
C[O:2][C:3]([C:5]1[CH:10]=[C:9]([Br:11])[C:8](=[O:12])[N:7]([CH3:13])[C:6]=1[NH:14][C:15]1[CH:20]=[CH:19][C:18]([Br:21])=[CH:17][C:16]=1[F:22])=[O:4].COC(C1C=CC(=O)N(C)C=1NC1C=CC(Br)=CC=1F)=O.BrN1C(=O)CCC1=O>CN(C=O)C>[Br:11][C:9]1[C:8](=[O:12])[N:7]([CH3:13])[C:6]([NH:14][C:15]2[CH:20]=[CH:19][C:18]([Br:21])=[CH:17][C:16]=2[F:22])=[C:5]([C:3]([OH:4])=[O:2])[CH:10]=1

Participants

5

Reactant 3

HCID 67184N-bromobutanimideHCID 666733685-Bromo-2-(4-bromo-2-fluorophenylamino)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid methyl esterHCID 66673525Methyl 2-(4-bromo-2-fluorophenylamino)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylate

Product 1

HCID 576368905-Bromo-2-(4-bromo-2-fluorophenylamino)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acidYield 85%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Preparation of 5-bromo-2-(4-bromo-2-fluorophenylamino)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid methyl ester: To a solution of 2-(4-bromo-2-fluorophenylamino)-1-methyl-6-oxo-1,6-dihydropyridine-3-carboxylic acid methyl ester (0.390 g, 1.34 mmol) in DMF (10 mL) was added N-bromosuccinimide (0.263, 1.48 mmol). The reaction mixture was stirred at room temperature for 25 minutes and then quenched with saturated sodium bisulfite. The reaction mixture was diluted with H2O and partitioned between EtOAc/diethyl ether and saturated NaCl. The layers were separated and the aqueous layer was reextracted with EtOAc (1×). The combined organic layers were dried (Na2SO4) and concentrated under reduced pressure. Purification by flash column chromatography (methylene chloride/EtOAc, 15:1) gave 0.424 g (85%) pure desired product as a lavender foamy solid.

Workup

  1. customquenched with saturated sodium bisulfite
  2. additionThe reaction mixture was diluted with H2O
  3. custompartitioned between EtOAc/diethyl ether and saturated NaCl
  4. customThe layers were separated
  5. dry with materialThe combined organic layers were dried (Na2SO4)
  6. concentrationconcentrated under reduced pressure
  7. customPurification by flash column chromatography (methylene chloride/EtOAc, 15:1)

Sources & evidence

ORD record
ord-a8efee6fc69342f2b6a16103ece3c8e9
Source dataset
uspto-grants-2010_06
Patent number
US07732616B2

Reaction notes

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