Potassium Hydroxide → HCID 10799272, compound

HRID 326351Notes

Reaction equation

HRID 326351 reaction equation
[OH-].[K+].[OH:3][CH:4]([CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH3:20])[C:5]#[C:6][C:7]([O:9]CC)=[O:8]>C(O)C>[OH:3][CH:4]([CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH3:20])[C:5]#[C:6][C:7]([OH:9])=[O:8]

Participants

4

Reactant 2

HCID 14797Potassium HydroxideHCID 19433168HCID 19433168, compound

Product 1

HCID 10799272HCID 10799272, compound

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

A solution of potassium hydroxide (885 mg, 15.8 mmol) in 95% ethanol (35 ml) was added to ethyl 4-hydroxytridec-2-ynoate (2.68 g, 10.5 mmol) in the same solvent (5 ml) at 0°. After stirring at room temperature for 9 hours, most of the solvent was removed and water (20 ml) was added. The mixture was extracted thoroughy with dichloromethane (discarded), acidified to pH 1 with dilute hydrochloric acid and extracted with ethyl acetate. Evaporation of the dried (magnesium sulphate) ethyl acetate extracts gave an off-white solid, which on recrystallization from petroleum ether (at -78°) gave the title acid as colorless prisms: mp 65°-6°.

Workup

  1. customwas removed
  2. additionwater (20 ml) was added
  3. extractionThe mixture was extracted thoroughy with dichloromethane (discarded)
  4. extractionextracted with ethyl acetate
  5. customEvaporation of the
  6. dry with materialdried (magnesium sulphate) ethyl acetate extracts
  7. customgave an off-white solid, which
  8. customon recrystallization from petroleum ether (at -78°)
  9. customgave the title acid as colorless prisms

Sources & evidence

ORD record
ord-b3407c9b11e44c41897b5b77905846af
Source dataset
uspto-grants-1993_12
Patent number
US05268387

Reaction notes

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