Synthesis of alkynes involves a double elimination reaction. Remember that we use elimination to make a double bond. We have to do two elimination reactions to get a triple bond.
What do we need in our starting material? Two leaving groups such as two halogens. The leaving groups need to be either on the same carbon (geminal dihalide) or on neighboring carbons (vicinal dihalide).
The reagents used for elimination are strongly basic such as KOH ( potassium hydroxide) or NaNH2 (sodium amide).
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