Water → 2-cyclopropylmethyl-4-[2,2-di(tert-butoxycarbonyl)ethyl]-6-(3-fluoro-4-methoxyphenyl)-2H-pyridazin-3-one

HRID 8039

Reaction equation

HRID 8039 reaction equation
[H-].[Na+].[C:3]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])(=[O:12])[CH2:4][C:5]([O:7][C:8]([CH3:11])([CH3:10])[CH3:9])=[O:6].Br[CH2:19][C:20]1[C:21](=[O:39])[N:22]([CH2:35][CH:36]2[CH2:38][CH2:37]2)[N:23]=[C:24]([C:26]2[CH:31]=[CH:30][C:29]([O:32][CH3:33])=[C:28]([F:34])[CH:27]=2)[CH:25]=1.O>CN(C)C=O>[CH:36]1([CH2:35][N:22]2[C:21](=[O:39])[C:20]([CH2:19][CH:4]([C:5]([O:7][C:8]([CH3:9])([CH3:10])[CH3:11])=[O:6])[C:3]([O:13][C:14]([CH3:17])([CH3:16])[CH3:15])=[O:12])=[CH:25][C:24]([C:26]3[CH:31]=[CH:30][C:29]([O:32][CH3:33])=[C:28]([F:34])[CH:27]=3)=[N:23]2)[CH2:38][CH2:37]1

Participants

6

Reactant 4

HCID 962WaterHCID 24758Sodium hydrideHCID 68324Di-tert-butyl malonateHCID 219917104-bromomethyl-2-cyclopropylmethyl-6-(3-fluoro-4-methoxyphenyl)-2H-pyridazin-3-one

Product 1

HCID 219916102-cyclopropylmethyl-4-[2,2-di(tert-butoxycarbonyl)ethyl]-6-(3-fluoro-4-methoxyphenyl)-2H-pyridazin-3-oneYield 61.8%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

After 55% sodium hydride (322 mg, 7.38 mmol) was added to a solution of di-tert-butyl malonate (970 mg, 4.48 mmol) in N,N-dimethylformamide (10 mL), 4-bromomethyl-2-cyclopropylmethyl-6-(3-fluoro-4-methoxyphenyl)-2H-pyridazin-3-one (1.8 g, 4.90 mmol) was added under ice-cold stirring. The reaction mixture was stirred at room temperature for 1 hour, poured into water, and extracted with ethyl acetate. The extract was washed with brine and dried over anhydrous sodium sulfate. The solvent was distilled off under reduced pressure. The residue was isolated and purified by column chromatography on silica gel (hexane/ethyl acetate=3/1) to yield the title compound as a yellow powder (yield: 1.39 mg, 61.8%).

Workup

  1. additionwas added under ice-cold stirring
  2. extractionextracted with ethyl acetate
  3. washThe extract was washed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. distillationThe solvent was distilled off under reduced pressure
  6. customThe residue was isolated
  7. custompurified by column chromatography on silica gel (hexane/ethyl acetate=3/1)

Sources & evidence

ORD record
ord-64b894aee23246cebcc958882c411997
Source dataset
uspto-grants-2006_08
Patent number
US07087606B2

Linked notes

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