Exercice $1_{?}$

Cis$-$jasmone $K$ is an important intermediate in perfumery.

a$)$ What is its name according to IUPAC nomenclature?

b$)$ Does it have mesomeric forms? If so$,$ which ones?

c$)$ Cis$-$jasmone $K$ can accept the molecule $L$ as a precursor.

How can it be converted from $L$ to $K?$ What mechanism would you suggest? Can other

isomeric compounds of $K$ be formed? If so$,$ which ones?

K