In a normal demand Diels -- Alder reaction the dienophile is conjugated with an electron - donating group .
Diels -- Alder reaction is the dienophile has an electron - withdrawing group in conjugation with the alkene ; in an inverse - demand scenario .
In a normal demand Diels -- Alder reaction , the dienophile has an electron - withdrawing group in conjugation with the alkene ; in an inverse - demand scenario , the dienophile is conjugated with an electron - donating group .