Answer:
The Diels-Alder products for each reaction are as follows:
(a) CO2Me + heat = A CO Me
In this reaction, the Diels-Alder product is a cyclohexene derivative. This can be either the endo-product or the exo-product, depending on the orientation of the substituents on the diene and dienophile.
(b) CN + El heat = A CO2Me CN
In this reaction, the Diels-Alder product is a cyclohexene derivative. This can be either the endo-product or the exo-product, depending on the orientation of the substituents on the diene and dienophile.
(c) CO Me + IN heat = A CO Me
In this reaction, the Diels-Alder product is a cyclohexene derivative. This can be either the endo-product or the exo-product, depending on the orientation of the substituents on the diene and dienophile.
(d) Cyclopentadiene can dimerize via Diels-Alder reaction: heat = A + Chemical Formula: C10H12
In this reaction, the Diels-Alder product is a dimer of cyclopentadiene. This is a cyclodecadiene derivative, which can be either the endo-product or the exo-product, depending on the orientation of the substituents on the diene and dienophile.