Methanol → Methyl 4-dimethylaminobenzoate

HRID 34730

Reaktionsgleichung

Reaktionsgleichung von HRID 34730
[CH3:1][N:2]([CH3:12])[C:3]1[CH:11]=[CH:10][C:6]([C:7]([OH:9])=[O:8])=[CH:5][CH:4]=1.OS(O)(=O)=O.[CH3:18]O>>[CH3:1][N:2]([CH3:12])[C:3]1[CH:11]=[CH:10][C:6]([C:7]([O:9][CH3:18])=[O:8])=[CH:5][CH:4]=1

Komponenten

4

Edukt 3

HCID 887MethanolHCID 1118Sulfuric AcidHCID 120924-(Dimethylamino)benzoic acid

Produkt 1

HCID 70994Methyl 4-dimethylaminobenzoate

Versuchsvorschrift

p-Dimethylaminobenzoic acid (50 g.) and concentrated H2SO4 (25 ml.) in 350 ml. methanol were refluxed 18 hours. The reaction mixture was cooled, quenched with ice and water (350 ml.), neutralized portionwise with KHCO3 until foaming ceased, and extracted 3×200 ml. CHCl3. The organic layers were combined, washed 1×150 ml. brine, dried (MgSO4) and reduced in volume to yield crystalline title product, 52 g.; 1H-nmr: 3.02 (s, 6H), 3.87 (s, 3H), 6.66 (d, J=16 Hz, 2H), 7.95 (d, J=16 Hz, 2H).

Aufarbeitung

  1. temperatureThe reaction mixture was cooled
  2. customquenched with ice and water (350 ml.), neutralized portionwise with KHCO3 until foaming
  3. extractionextracted 3×200 ml
  4. washwashed 1×150 ml
  5. dry with materialbrine, dried (MgSO4)

Quellen und Nachweise

ORD-Eintrag
ord-05b040c532f649a6a9c0789244b217ae
Quelldatensatz
uspto-grants-1988_08
Patentnummer
US04762921

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