4-Amino-2-(2-chloro-phenylamino)-3-fluoro-5-nitro-benzoic acid methyl ester → 4,5-Diamino-2-(2-chloro-phenylamino)-3-fluoro-benzoic acid methyl ester

HRID 1925814Notes

Reaction equation

HRID 1925814 reaction equation
[CH3:1][O:2][C:3](=[O:23])[C:4]1[CH:9]=[C:8]([N+:10]([O-])=O)[C:7]([NH2:13])=[C:6]([F:14])[C:5]=1[NH:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=1[Cl:22]>CC(O)=O.C(OCC)(=O)C.[Zn]>[CH3:1][O:2][C:3](=[O:23])[C:4]1[CH:9]=[C:8]([NH2:10])[C:7]([NH2:13])=[C:6]([F:14])[C:5]=1[NH:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=1[Cl:22]

Participants

5

Reactant 1

HCID 865928774-Amino-2-(2-chloro-phenylamino)-3-fluoro-5-nitro-benzoic acid methyl ester

Product 1

HCID 865928784,5-Diamino-2-(2-chloro-phenylamino)-3-fluoro-benzoic acid methyl esterYield 48%

Reagents, catalysts & solvents 3

HCID 23994ZincCatalystHCID 176Acetic AcidSolventHCID 8857Ethyl AcetateSolvent

Procedure

4-Amino-2-(2-chloro-phenylamino)-3-fluoro-5-nitro-benzoic acid methyl ester 5b (0.30 g, 0.88 mmol) is suspended in AcOH (5 mL) and zinc dust (0.29 g, 4.42 mmol) is added. After 15 minutes, the reaction is complete. The reaction mixture is diluted with ethyl acetate and filtered through Celite. The filtrate is washed with water, saturated NaHCO3, 10% K2CO3 and brine. The organic layer is dried (MgSO4) and concentrated under reduced pressure to give 0.13 g (48%) pure desired product as a whitish brown foam.

Workup

  1. filtrationfiltered through Celite
  2. washThe filtrate is washed with water, saturated NaHCO3, 10% K2CO3 and brine
  3. dry with materialThe organic layer is dried (MgSO4)
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-92b15623e9e1416b9347841e40832342
Source dataset
uspto-grants-2012_05
Patent number
US08178693B2

Reaction notes

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