Acetic Anhydride → HCID 20465612, compound

HRID 1605767Notes

Reaction equation

HRID 1605767 reaction equation
OCCCCCC1CCCC1=O.OCCCCCC1CCCC1=O.C(OCCCCCC1CCCC1=O)(=O)C.O.C1(C)C=CC(S(O)(=O)=O)=CC=1.C(OC(=O)C)(=O)C.[CH3:59][C:60]([O:62][CH2:63][C:64]1[C:77]2[C:72](=[CH:73][CH:74]=[CH:75][CH:76]=2)[C:71]([CH2:78][O:79][C:80]([CH3:82])=[O:81])=C2C=1C=CC=C2)=[O:61]>>[C:80]([O:79][C:78]1[CH2:71][CH2:72][CH2:73][C:74]=1[CH2:75][CH2:76][CH2:77][CH2:64][CH2:63][O:62][C:60](=[O:61])[CH3:59])(=[O:81])[CH3:82]

Participants

6

Reactant 5

HCID 7918Acetic Anhydride2×HCID 521998p-Toluenesulfonic acid monohydrateHCID 613145Acetic acid 10-acetoxymethyl-anthracen-9-ylmethyl esterHCID 204655182-(5-Hydroxypentyl)cyclopentan-1-oneHCID 867329372-(5-Hydroxypentyl)cyclopentanone 2-(5-acetoxypentyl)-cyclopentanone

Product 1

HCID 20465612HCID 20465612, compound

Procedure

A solution of 400 g. (2.04 moles) of a mixture of 2-(5-hydroxypentyl)cyclopentanone and 2-(5-acetoxypentyl)cyclopentanone (Example 55) and 4.0 g. of p-toluenesulfonic acid monohydrate in 11. l. of acetic anhydride is refluxed acetic a rate to maintain a steady distillation of accetic acid from the reaction through a helix -packed fractionation column. The reaction is continued with the addition of acetic anhydride to maintain a constant volume until complete conversion of starting materials to product is evident. The mixture is cooled and partitioned between 2 l. of hexane and 3 l. of cold water containing solid sodium bicarbonate to maintain a neutral pH. The organic phase is washed with saturated brine, dried (MgSO4), and evaporated to yield 452 g. of an oil.

Workup

  1. temperatureto maintain
  2. distillationa steady distillation of accetic acid
  3. customfrom the reaction through a helix -packed fractionation column
  4. temperatureto maintain a constant volume until complete conversion of starting materials to product
  5. temperatureThe mixture is cooled
  6. custompartitioned between 2 l
  7. temperatureof cold water containing solid sodium bicarbonate to maintain a neutral pH
  8. washThe organic phase is washed with saturated brine
  9. dry with materialdried (MgSO4)
  10. customevaporated
  11. customto yield 452 g

Sources & evidence

ORD record
ord-a8bcc23e0e154d2283ea2345a83fc5e5
Source dataset
uspto-grants-1976_04
Patent number
US03950406

Reaction notes

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