91Ó°ÊÓ

LDA is the lithium di-isopropylamide $\left(C_4{H}_{9}Li\right)$ it is the strong base used to protonate the acidic hydrogen to form lithium enolate.

It is the reaction of the enolate ion with carbonyl group other than reacting carbonyl species which leads to forming$\mathbf{Î\pm }\mathbf{,}\mathbf{β}$ unsaturated aldehyde or ketone.

It is also called mixed aldol condensation because reacting carbonyl is react with different carbonyls to form the product.

As the hydrogen is protonated from the reacting species formation of enolate ion occurs which combines carbonyl other than reacting carbonyl species followed by the removal of formation of unsaturated aldehyde occur.

1. Deprotonation of hydrogen
2. Enolate formed
3. Cross aldol condensation

Product Formation