Alkynes can act as dienophiles in the Diels-Alder reaction. The reaction between diene and alkyne forms a 1,4-cyclohexadiene.
![diels-alder-alkynes diels-alder-alquinos](/images/stories/organica-i/diels-alder/diels-alder-alquinos/diels-alder-alquinos-01.png)
1,3-Butadiene [1] reacts with diethyl butynedioate [2] to form diethyl cyclohexa-1,4-diene-1,2-dicarboxylate [3].
![diels-alder-alkynes diels-alder-alquinos](/images/stories/organica-i/diels-alder/diels-alder-alquinos/diels-alder-alquinos-02.png)
Alkynes can act as dienophiles in the Diels-Alder reaction. The reaction between diene and alkyne forms a 1,4-cyclohexadiene.