Water → 7-Aminocarbonyl-6-chloro-2,3-dihydro-2,2-dimethylbenzofuran

HRID 1734610Notes

Reaction equation

HRID 1734610 reaction equation
[Cl:1][C:2]1[CH:12]=[CH:11][C:5]2[CH2:6][C:7]([CH3:10])([CH3:9])[O:8][C:4]=2[C:3]=1[C:13]#[N:14].[OH-:15].[K+].O>CC(O)(C)C>[NH2:14][C:13]([C:3]1[C:4]2[O:8][C:7]([CH3:10])([CH3:9])[CH2:6][C:5]=2[CH:11]=[CH:12][C:2]=1[Cl:1])=[O:15]

Participants

5

Reactant 3

HCID 962WaterHCID 14797Potassium HydroxideHCID 538583176-Chloro-7-cyano-2,3-dihydro-2,2-dimethylbenzofuran

Product 1

HCID 539852047-Aminocarbonyl-6-chloro-2,3-dihydro-2,2-dimethylbenzofuranYield 75.7%

Reagents, catalysts & solvents 1

HCID 6386tert-ButanolSolvent

Procedure

A stirred solution of 10.0 grams (0.048 mole) of 6-chloro-7-cyano-2,3-dihydro-2,2-dimethylbenzofuran in 200 mL of 2-methyl-2-propanol was warmed to reflux, and 9.5 grams (0.17 mole) of 85% potassium hydroxide was added in one portion. Upon completion of addition, the reaction mixture was heated at reflux for about 75 minutes. The reaction mixture was then cooled and poured into 400 mL of water that was cooled in an ice bath. The resultant solid was collected by filtration and dried under vacuum, yielding 8.2 grams of 7-aminocarbonyl-6-chloro-2,3-dihydro-2,2-dimethylbenzofuran. The NMR spectrum was consistent with the proposed structure.

Workup

  1. temperatureto reflux
  2. additionUpon completion of addition
  3. temperaturethe reaction mixture was heated
  4. temperatureat reflux for about 75 minutes
  5. temperatureThe reaction mixture was then cooled
  6. temperaturewas cooled in an ice bath
  7. filtrationThe resultant solid was collected by filtration
  8. customdried under vacuum

Sources & evidence

ORD record
ord-f3f321cef8b24e88b6ad3424d1bcebfd
Source dataset
uspto-grants-1996_07
Patent number
US05534518

Reaction notes

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