Hydrochloric Acid → 1-(7-Ethyl-9H-fluoren-2-YL)ethan-1-one

HRID 1077304Notes

Reaction equation

HRID 1077304 reaction equation
[C:1](OC(=O)C)(=[O:3])[CH3:2].[Cl-].[Al+3].[Cl-].[Cl-].[CH2:12]([C:14]1[CH:26]=[CH:25][C:24]2[C:23]3[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=3)[CH2:17][C:16]=2[CH:15]=1)[CH3:13].Cl>ClC(Cl)C>[C:1]([C:20]1[CH:21]=[CH:22][C:23]2[C:24]3[C:16](=[CH:15][C:14]([CH2:12][CH3:13])=[CH:26][CH:25]=3)[CH2:17][C:18]=2[CH:19]=1)(=[O:3])[CH3:2]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 7918Acetic AnhydrideHCID 2749392-Ethyl-9H-fluoreneHCID 6451240Aluminum(III) Chloride

Product 1

HCID 215039081-(7-Ethyl-9H-fluoren-2-YL)ethan-1-one

Reagents, catalysts & solvents 1

HCID 63651,1-DichloroethaneSolvent3×

Procedure

Acetic anhydride (2.67 g.) in dichloroethane (10 ml.) was added dropwise to a stirred, cooled (0°) suspension of aluminum chloride (6.95 g.) in dichloroethane (20 ml.). Cooling and stirring were continued during the dropwise addition of a solution of 2-ethylfluorene (4.61 g.) in dichloroethane (50 ml.). The mixture was stirred for one hour at room temperature and then decomposed by the dropwise addition of 2N-hydrochloric acid (40 ml.) to the cooled solution. The organic layer was separated, washed with water and with aqueous sodium bicarbonate, dried over anhydrous sodium sulphate, filtered, and evaporated under reduced pressure. The residue was recrystallised from light petroleum (ca 250 ml., b.p. 60°-80°) to give 2-acetyl-7-ethylfluorene m.p. 120°-122°.

Workup

  1. temperaturecooled
  2. temperatureCooling
  3. stirringThe mixture was stirred for one hour at room temperature
  4. customThe organic layer was separated
  5. washwashed with water and with aqueous sodium bicarbonate
  6. dry with materialdried over anhydrous sodium sulphate
  7. filtrationfiltered
  8. customevaporated under reduced pressure
  9. customThe residue was recrystallised from light petroleum (ca 250 ml., b.p. 60°-80°)

Sources & evidence

ORD record
ord-9e60e01118f34d20b67d204e025b32b2
Source dataset
uspto-grants-1976_05
Patent number
US03959482

Reaction notes

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