91Ó°ÊÓ

In Michael reaction, an $\mathit{Î\pm }\mathbf{,}\mathit{β}$-unsaturated ketone is subjected to 1,4-addition with an enolate. The enolate acts as a nucleophile that gets deprotonate in presence of ethoxide, and then attacks at the $\mathit{β}$-carbon position of the ketone system.

The general reaction is given below:

Michael Reaction

When two carbonyl compounds react in the presence of a strong base to form an $\mathit{Î\pm }\mathbf{,}\mathit{β}\mathbf{}$-unsaturated ketone or aldehyde, the reaction is known as Aldol condensation. The reaction proceeds with the formation of enol or enolate.

The general reaction is given below:

Aldol condensation

In Michael reaction, the$\mathit{Î\pm }\mathbf{,}\mathit{β}$-unsaturated ketone is termed as the Michael acceptor.

For the given compound, the Michael acceptor would be:

Determination of Michael acceptor

The mechanism of aldol condensation of $\mathrm{β}$-vetivone is given below:

Mechanism of the Aldol condensation step