Acetic Anhydride → 1,1-Cyclohexanediacetic Anhydride

HRID 1099480

Reaction equation

HRID 1099480 reaction equation
[C:1]1([CH2:11][C:12]([OH:14])=[O:13])([CH2:7][C:8]([OH:10])=O)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.C(OC(=O)C)(=O)C>>[C:1]12([CH2:7][C:8](=[O:10])[O:14][C:12](=[O:13])[CH2:11]1)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6]2

Participants

3

Reactant 2

HCID 7918Acetic AnhydrideHCID 78061Cyclohexanediacetic acid

Product 1

HCID 27342891,1-Cyclohexanediacetic AnhydrideYield 100%

Procedure

A suspension of 1,1-cyclohexanediacetic acid (39.95 mmol) in acetic anhydride (159.8 mmol) was refluxed gently until a clear solution was obtained (ca. 1 h). The reaction mixture was kept at reflux for another hour until the reaction was complete. The reaction mixture was cooled to room temperature and acetic acid and excess acetic anhydride were removed under vacuum to afford 7.28 g (100%) of (3). 1H NMR (CDCl3): 2.65 (4H, s); 1.54-1.43 (10H, m).

Workup

  1. temperaturewas refluxed gently until a clear solution
  2. customwas obtained (ca. 1 h)
  3. temperatureat reflux for another hour until the reaction
  4. customacetic acid and excess acetic anhydride were removed under vacuum

Sources & evidence

ORD record
ord-51de30396c24492eb2e411b3fe2b9630
Source dataset
uspto-grants-2012_03
Patent number
US08143437B2

Linked notes

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