Potassium Hydroxide → (4S)-Oct-1-yn-4-ol

HRID 461276Notes

Reaction equation

HRID 461276 reaction equation
C([O:9][C@@H:10]([CH2:14][CH2:15][CH2:16][CH3:17])[CH2:11][C:12]#[CH:13])(=O)C1C=CC=CC=1.[OH-].[K+].CO.O.OC(CCCC)CC#C>C(OCC)(=O)C>[OH:9][C@@H:10]([CH2:14][CH2:15][CH2:16][CH3:17])[CH2:11][C:12]#[CH:13]

Participants

6

Reactant 4

HCID 14797Potassium HydroxideHCID 1036561-Octyn-4-olHCID 22242641Methanol--water (1/1)HCID 53798844(S)-4-benzoyloxy-1-octyne

Product 1

HCID 12786164(4S)-Oct-1-yn-4-ol

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

A solution of 1.15 g. (5.0 mmoles) of (S)-4-benzoyloxy-1-octyne (Example 899) and 1.40 g. (25 mmoles) of potassium hydroxide in 50 ml. of 10:1 methanol-water is allowed to stand at room temperature for 24 hours. The bulk of the methanol is evaporated at room temperature, and the mixture is extracted with ether. The extract is washed with brine, dried over magnesium sulfate, and evaporated to give a colorless oil, identical to 4-hydroxy-1-octyne [α]D25 = +17° ± 1.0° (C=0.77, ethyl acetate). This compound has the (S)-configuration.

Workup

  1. customThe bulk of the methanol is evaporated at room temperature
  2. extractionthe mixture is extracted with ether
  3. washThe extract is washed with brine
  4. dry with materialdried over magnesium sulfate
  5. customevaporated
  6. customto give a colorless oil

Sources & evidence

ORD record
ord-88b547a75782478a8ae4569b330faeb5
Source dataset
uspto-grants-1977_12
Patent number
US04061672

Reaction notes

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