Q. $C_6H_9Br \ce{->[(CH_3)_3CO^-K^+][-(CH_3)_3COH]} X \ce{->[CH_2 = CHCOCH_3]} B$ conversion of $X$ to $B$ is:
Delhi UMET/DPMTDelhi UMET/DPMT 2006
Solution:
The conversion of $X$ to $B$ is Diels-Alder reaction because it consists of the addition of a conjugated diene to a unsaturated molecule, generally called as a dienophile, resulting in the formation of a cyclic compound. Commonly known as adduct.

