Sulfuric Acid → Potassium 4-dodecylbenzenesulfonate

HRID 631045Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 631045
[C:1]1([CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18])[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[OH:19][S:20](O)(=[O:22])=[O:21].[OH-].[K+:25]>>[CH2:7]([C:1]1[CH:6]=[CH:5][C:4]([S:20]([O-:22])(=[O:21])=[O:19])=[CH:3][CH:2]=1)[CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18].[K+:25]

Komponenten

4

Edukt 3

HCID 1118Sulfuric AcidHCID 14797Potassium HydroxideHCID 31237Dodecylbenzene

Produkt 1

HCID 23672299Potassium 4-dodecylbenzenesulfonateAusbeute 84 %

Reaktionsbedingungen

Temperatur
90 °C

Versuchsvorschrift

A mixture of 1-phenyldodecane (7.5 g, 30.5 mmol) and concentrated H2SO4 (8.4 mL) was stirred vigorously at 90° C. for 1 h, cooled to room temperature, and then gradually poured with stirring into 10% aqueous KOH solution (175 mL). The resulting white precipitate was collected by filtration, washed with cold water (40 mL) and dried to give potassium 4-dodecylbenzene sulfonate (10.6 g, 29.1 mmol, 84%). This salt (10.0 g, 27.5 mmol) and POCl3 (4.2 g, 27.4 mmol) were stirred at room temperature and gradually heated to 170° C. The hot reaction mixture was poured into cold water and extracted with CHCl2. The organic layer was washed with water, dried over anhydrous Na2SO4, and filtered. Evaporation of the volatiles yielded p-dodecylbenzenesulfonyl chloride as a pale yellow liquid (9.2 g, 97%) which eventually became crystalline, mp 33° C.; 1H NMR (300 MHz, CDCl3) δ 0.88 (t, 3H, J=6.5), 1.20-1.38 (m, 18H), 1.60-1.68 (m, 2H), 2.72 (t, 2H, J=7.5 Hz), 7.40 (d, 2H, J=8.4 Hz), 7.79 (d, 2H, J=8.4 Hz); 13C NMR (75 MHz, CDCl3) δ 14.1, 22.6, 29.1, 29.3, 29.3, 29.5, 29.6, 30.9, 31.9, 36.0, 127.0, 129.6, 141.7, 151.6.

Aufarbeitung

  1. temperaturecooled to room temperature
  2. additiongradually poured
  3. filtrationThe resulting white precipitate was collected by filtration
  4. washwashed with cold water (40 mL)
  5. customdried

Quellen und Nachweise

ORD-Eintrag
ord-1ee24bbd5ce349fcb3189db0ffea2bea
Quelldatensatz
uspto-grants-2016_04
Patentnummer
US09320734B2

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