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The transformation of one chemical substance to another by applying some conditions that involve temperature change, reagents, variation of pressure, etc., is called synthetic transformation. The synthetic transformation is very essential for the invention of useful chemicals.

This conversion can be carried out by reacting 2,2-dibromobutane with NaNH₂ at then followed by treatment with water. The reaction is shown below.

Synthetic transformation of 2,2-dibromobutane to but-1-yne

This conversion can be carried out by reacting 2,2-dibromobutane with KOH at . The reaction is shown below.

Synthetic transformation of 2,2-dibromobutane to but-2-yne

This conversion can be carried out by reacting but-1-yne with ${\text{NaNH}}_2$followed by the reaction with${\text{CH}}_3{\text{CH}}_2{\text{CH}}_2{\text{CH}}_2\text{Br}$. The reaction is shown below.

Synthetic conversion of but-1-yne to oct-3-yne

This conversion can be carried out by reacting trans-hex-2-ene with and followed by heating at with KOH. The reaction is shown below.

Synthetic transformation of trans-hex-2-ene to hex-2-ene

This conversion can be carried out by reacting 2,2-dibromohexane with at followed by the reaction with water. The reaction is shown below.

Synthetic conversion of 2,2-dibromohexane to hex-1-yne

This conversion can be carried out by reacting cyclodecyne with in the presence of Lindlar’s catalyst. The reaction is shown below.

Synthetic conversion of cyclodecyne to cis-cyclodecene

This conversion can be carried out by reacting cyclodecyne with sodium metal in the presence of ammonia. The reaction is shown below.

Synthetic conversion of cyclodecyne to trans-cyclodecene

This conversion can be carried out by reacting hex-1-yne with . The reaction is shown below.

Synthetic conversion of hex-1-yne to hexan-2-one,${\text{CH}}_{\text{3}}{\text{COCH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{2}}{\text{CH}}_{\text{3}}$

This conversion can be carried out by reacting hex-1-yne with${\text{Sia}}_2\text{BH,}{\text{H}}_2{\text{O}}_2\text{,}{\text{OH}}^{-}$. The reaction is shown below.

Synthetic conversion of hex-1-yne to hexanal,${\text{CH}}_{\text{3}}{\left({\text{CH}}_{\text{2}}\right)}_{\text{4}}\text{CHO}$

This conversion can be carried out by reacting trans-hex-2-ene with Br₂ and CCI₄ followed by heating at with KOH. It is followed by the reaction with H₂ in the presence of Lindlar’s catalyst. The reaction is shown below.

Synthetic conversion of trans-hex-2-ene to cis-hex-2-ene