They can be synthesized from vinyl bromides via the Fritsch-Buttenberg- Wiechell rearrangement, or from aldehydes via the Seyferth-Gilbert reaction, but they are more commonly created by double elimination of vicinal dihalides.
They can be synthesized from vinyl bromides via the Fritsch-Buttenberg- Wiechell rearrangement, or from aldehydes via the Seyferth-Gilbert reaction, but they are more commonly created by double elimination of vicinal dihalides. One common reaction the reduction of these compounds by a catalyst poisoned with quinoline and named for Lindlar.  Hydroboration or oxy-mercuration of these compounds leads to an enol, which then tautomerizes into a carbonyl compound. Terminal ones have a pKa of about 25, meaning they can be easily deprotonated and used in ring opening of epoxides and nucleophilic attacks. Consisting of at least one pair of sp-hybridized carbons bonded to each other, FTP, name these compounds that contain a carbon-carbon triple bond.
They can be synthesized from vinyl bromides via the Fritsch-Buttenberg- Wiechell rearrangement, or from aldehydes via the Seyferth-Gilbert reaction, but they are more commonly created by double elimination of vicinal dihalides.
{Alkynes}