2-Hydroxybutyric acid

  • 2-hydroxybutyric
  • α -hydroxybutyric acid
  • 565-70-8 ( unspecified mixture of enantiomers )
  • 20016-85-7 [(R )-2- hydroxybutyric acid ]
  • 3347-90-8 [(S )-2- hydroxybutyric acid ]
  • 600-15-7 [( ± )-2- hydroxybutyric acid ]

White crystals

Fixed

1.125 g · cm -3 (20 ° C, racemate)

  • 50-54 ° C ( enantiomers) α
  • 44 ° C ( racemate)

260 ° C ( racemate)

Soluble in water, ethanol and ether

Risk

Template: Infobox chemical / molecular formula search available

2- hydroxybutyric acid, also dated 2 -hydroxybutyric acid, is a chemical compound from the group of hydroxycarboxylic acids. It exists in two enantiomeric forms of [(R )-2- hydroxybutyric acid and (S )-2- hydroxybutyric acid ]. Its salts are called 2- hydroxybutyrate.

Representation

2- hydroxybutyric acid can be prepared from 2- bromobutyric acid, and silver oxide.

Another synthesis starts from propanal, which is converted with hydrogen cyanide into the corresponding cyanohydrin. The hydrolysis of the nitrile leads to the elimination of ammonia, 2 -hydroxybenzoic acid.

And the heating to 180 ° C provides Ethyltartronsäure decarboxylation 2- hydroxybutanoic acid.

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