Chlorosulfonic acid → p-Hexadecylbenzenesulfonyl chloride

HRID 1966916Notes

Reaction equation

HRID 1966916 reaction equation
[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][CH2:18][CH2:19][CH2:20][CH2:21][CH2:22]CC)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[Cl:25][S:26](O)(=[O:28])=[O:27]>C(Cl)(Cl)Cl>[CH2:7]([C:1]1[CH:6]=[CH:5][C:4]([S:26]([Cl:25])(=[O:28])=[O:27])=[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][CH2:18][CH2:19][CH2:20][CH2:21][CH3:22]

Participants

4

Reactant 2

HCID 24638Chlorosulfonic acidHCID 78187Benzene, octadecyl-

Product 1

HCID 20570237p-Hexadecylbenzenesulfonyl chlorideYield 72%

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent

Procedure

To a solution of 1-phenyloctadecane (0.76 g, 2.5 mmol) in CHCl3 (5 mL) was added chlorosulfonic acid (0.5 mL, 7.5 mmol) and the mixture was stirred at rt for 22 h. The mixture was poured on ice and extracted with CH2Cl2. The combined extracts were washed with water, a solution of NaHCO3, and water, dried (Na2SO4), and concentrated in vacuo. The residue was chromatographed on silica gel (70-230 mesh) with hexane/ethyl acetate (49:1) to give the product as a white solid (0.71 g, 1.8 mmol, 72%), mp 35-36° C.; 1H NMR (300 MHz, CDCl3) δ 0.88 (t, 3H, J=7.2 Hz), 1.25 (m, 26H), 1.62 (m, 2H), 2.72 (t, 2H, J=7.8 Hz), 7.42 (d, 2H, J=8.4 Hz), 7.95 (d, 2H, J=8.4 Hz); 13C NMR (75 MHz, CDCl3) 14.4, 22.9, 29.4, 29.64, 29.8, 29.9, 31.2, 32.2, 36.3, 127.3, 129.8, 142.0, 151.9.

Workup

  1. additionThe mixture was poured on ice
  2. extractionextracted with CH2Cl2
  3. washThe combined extracts were washed with water
  4. dry with materiala solution of NaHCO3, and water, dried (Na2SO4)
  5. concentrationconcentrated in vacuo
  6. customThe residue was chromatographed on silica gel (70-230 mesh) with hexane/ethyl acetate (49:1)

Sources & evidence

ORD record
ord-4cd2f6c6770d4311a9fccb6052759606
Source dataset
uspto-grants-2013_04
Patent number
US08420678B2

Reaction notes

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