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Diethyl Malonate → 3-(4-Nitrophenyl)propanoic acid

HRID 880411
Notes
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Reaction equation

HRID 880411 reaction equation
[C:1]([O:9]CC)(=[O:8])[CH2:2][C:3](OCC)=O.[N+:12]([C:15]1[CH:22]=[CH:21][C:18](CBr)=[CH:17][CH:16]=1)([O-:14])=[O:13].[H-].[Na+].[OH-].[Na+]>C1COCC1.O.C(O)C>[N+:12]([C:15]1[CH:22]=[CH:21][C:18]([CH2:3][CH2:2][C:1]([OH:9])=[O:8])=[CH:17][CH:16]=1)([O-:14])=[O:13]
ParticipantsProcedureSources & evidenceReaction notes

Participants

8

Reactant 4

HCID 7761Diethyl MalonateHCID 14798Sodium HydroxideHCID 24758Sodium hydrideHCID 660114-Nitrobenzyl bromide

Product 1

HCID 855263-(4-Nitrophenyl)propanoic acid

Reagents, catalysts & solvents 3

HCID 702EthanolSolvent
HCID 962
Water
Solvent
HCID 8028TetrahydrofuranSolvent

Procedure

Alkylation of diethyl malonate with 4-nitrobenzyl bromide using sodium hydride in THF, followed by ester hydrolysis with sodium hydroxide in water and ethanol, then heating the resulting diacid to its melting point causing decarboxylation gives 3-(4-nitro-phenyl)-propionic acid. Conversion to the acid chloride with thionyl chloride in DCM and coupling with 2-amino-4,6-dimethylpyridine affords N-(4,6-dimethyl-pyridin-2-yl)-3-(4-nitro-phenyl)-propionamide. Amide reduction with borane-dimethylsulfide in THF at reflux, methylation of the resulting amine with methyl iodide and sodium hydride in THF and finally catalytic hydrogenation over Raney nickel in methanol gives the required aniline.

Sources & evidence

ORD record
ord-1195b865c2c54e96bed8595ae2ea32b4
Source dataset
uspto-grants-2015_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08993574B2

Reaction notes

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On this pageParticipantsProcedureSources & evidenceReaction notes