2,5-Dihydroxybenzoic acid → 4-(3-Methoxycarbonyl-4-methoxyphenoxy)-1-nitrobenzene

HRID 2078548Notes

Reaction equation

HRID 2078548 reaction equation
[C:1]([C:4]1[CH:5]=[C:6]([CH:17]=[CH:18][C:19]=1O)[O:7][C:8]1[CH:13]=[CH:12][C:11]([N+:14]([O-:16])=[O:15])=[CH:10][CH:9]=1)([OH:3])=[O:2].O[C:22]1C=CC(O)=CC=1C(O)=O.C([O-])([O-])=O.[K+].[K+].S([O:43][CH3:44])(OC)(=O)=O>CC(C)=O>[CH3:22][O:3][C:1]([C:4]1[CH:5]=[C:6]([CH:17]=[CH:18][C:19]=1[O:43][CH3:44])[O:7][C:8]1[CH:13]=[CH:12][C:11]([N+:14]([O-:16])=[O:15])=[CH:10][CH:9]=1)=[O:2]

Participants

6

Reactant 4

HCID 34692,5-Dihydroxybenzoic acidHCID 6497Dimethyl SulfateHCID 11430Potassium CarbonateHCID 214925045-(4-Nitrophenoxy)-salicylic acid

Product 1

HCID 230230954-(3-Methoxycarbonyl-4-methoxyphenoxy)-1-nitrobenzene

Reagents, catalysts & solvents 1

HCID 180AcetoneSolvent

Procedure

To a solution of 4-(3-carboxy-4-hydroxyphenoxy)-1-nitrobenzene (prepared from 2,5-dihydroxybenzoic acid in a manner analogous to that described in Method 13, Step 1, 12 mmol) in acetone (50 mL) was added K2CO3 (5 g) and dimethyl sulfate (3.5 mL). The resulting mixture was heated at the reflux temp. overnight, then cooled to room temp. and filtered through a pad of Celite®. The resulting solution was concentrated under reduced pressure, absorbed onto SiO2, and purified by column chromatography (50% EtOAc/50% hexane) to give 4-(3-methoxycarbonyl-4-methoxyphenoxy)-1-nitrobenzene as a yellow powder (3 g): mp 115-118° C.

Workup

  1. temperatureThe resulting mixture was heated at the reflux temp
  2. temperatureovernight, then cooled to room temp.
  3. filtrationfiltered through a pad of Celite®
  4. concentrationThe resulting solution was concentrated under reduced pressure
  5. customabsorbed onto SiO2
  6. custompurified by column chromatography (50% EtOAc/50% hexane)

Sources & evidence

ORD record
ord-66998592f6624910b3f3f5f2cdf50cb0
Source dataset
uspto-grants-2011_04
Patent number
US07928239B2

Reaction notes

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