Question

The major product formed in the above reaction is:

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is B

The question involves determining the major product of a reaction given in the context of organic chemistry. Since the image depicts a cycloaddition reaction between benzene and a furan derivative, this is likely a [4+2] cycloaddition, commonly known as a Diels-Alder reaction. 

1. The Diels-Alder reaction involves a diene and a dienophile, leading to the formation of a six-membered ring.
2. In this example, furan acts as the diene, and benzene is involved in the reaction as the dienophile.
3. The reaction proceeds via a concerted mechanism where the π-electrons rearrange to form new σ-bonds, resulting in the formation of a bicyclic structure.
4. The expected major product is the endo-adduct due to the favorable interaction of substituents in the transition state.
5. The correct major product is the one where the oxygen atom of furan is oriented away from the central structure, leading to stability.

Among the given options, the correct major product matches with:

Thus, the reaction between benzene and the furan derivative results in the formation of a bicyclic compound shown above, consistent with the Diels-Alder reaction stereochemistry.