Alkynol
class of chemical compounds
In organic chemistry, alkynols (hydroxyalkynes) are organic compounds that contain both alkyne and alcohol functional groups. Thus, as structural features, they have a C≡C triple bond and a hydroxyl group. Some alkynols play a role as intermediates in the chemical industry.
The shortened term ynol typically refers to alkynols with the hydroxyl group affixed to one of the two carbon atoms composing the triple bond (C≡C−OH), the triple-bond analogues to enols. Ynols can tautomerize to ketenes.
The deprotonated anions of ynols are known as ynolates, the triple-bond analogues to enolates.
Synthesis
Alkynols may be formed by the alkynylation of carbonyl compounds, usually in liquid ammonia.
Ynolates
Ynolates are chemical compounds with a negatively charged oxygen atom attached to an alkyne functionality. They were first synthesized in 1975 by Schöllkopf and Hoppe via the n-butyllithium fragmentation of 3,4-diphenylisoxazole.
Synthetically, they behave as ketene precursors or synthons.
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