Sulfuric Acid → 2,3-Dichloro-6-nitrophenol

HRID 612688Notes

Reaction equation

HRID 612688 reaction equation
[Cl:1][C:2]1[C:7]([Cl:8])=[CH:6][CH:5]=[CH:4][C:3]=1[OH:9].[N+:10]([O-])([O-:12])=[O:11].[Na+].S(=O)(=O)(O)O.N([O-])=O.[Na+]>C(Cl)Cl>[N+:10]([C:4]1[CH:5]=[CH:6][C:7]([Cl:8])=[C:2]([Cl:1])[C:3]=1[OH:9])([O-:12])=[O:11]

Participants

6

Reactant 4

HCID 1118Sulfuric AcidHCID 113342,3-DichlorophenolHCID 24268Sodium NitrateHCID 23668193Sodium Nitrite

Product 1

HCID 105602752,3-Dichloro-6-nitrophenolYield 44%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

2,3-dichlorophenol (3.26 g, 20 mmol) was dissolved in methylene chloride(40 mL) followed by the addition of sodium nitrate (1.88 g, 22 mmol). The addition of sulfuric acid (20 mL/3 M) was then made, followed by addition of a catalytic amount of sodium nitrite. The mixture was allowed to stir. After 24 hours, the reaction mixture was diluted with methylene chloride and extracted with water. The organic layer was dried over MgSO4 and filtered. The solvent was evaporated and chromatography of the resulting solid on silica gel (4%MeOH/CH2Cl2) gave the desired product(1.8 g, 44%). 1H NMR (CD3COCD3): δ 8.04 (d,1H), 7.15 (d, 1H).

Workup

  1. extractionextracted with water
  2. dry with materialThe organic layer was dried over MgSO4
  3. filtrationfiltered
  4. customThe solvent was evaporated

Sources & evidence

ORD record
ord-269e3881ddaf4304a54fda171909d506
Source dataset
uspto-grants-1999_12
Patent number
US06005008

Reaction notes

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