The terminal variety of these compounds have high acidity, with a pKa of about 26.
Aryl ketones are converted to these compounds in the presence of dimethyl phosphonate in the Seyferth-Gilbert homologation. Palladium and copper catalysts are used to form a carbon-carbon bond between these compounds and an aryl halide in the Sonogashira coupling. The terminal variety of these compounds have high acidity, with a pKa of about 26. Aldehydes are transformed into these compounds by the (*) Corey-Fuchs reaction. A lead-poisoned palladium catalyst named for Lindlar is used to hydrogenate these compounds to alkenes. For 10 points, name this functional group with a carbon-carbon triple bond.
Aryl ketones are converted to these compounds in the presence of dimethyl phosphonate in the Seyferth-Gilbert homologation.
alkynes