Terminal alkynes (R2C![[triple bond, length as m-dash]](https://www.rsc.org/images/entities/char_e002.gif)
CH) may be converted into ketones (R2R3CHCOR1) by the alkylation or protonation of lithium lakynyltrialkylborate salts followed by oxidation, this being a general route to specifically substituted ketones and a major extension of alkyne chemistry.
A. Pelter, C. R. Harrison and D. Kirkpatrick, J. Chem. Soc., Chem. Commun., 1973, 544 DOI: 10.1039/C39730000544
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