91Ó°ÊÓ

It’s a method in which a substituted derivative of acetone formation occurs in the presence of sodium ethoxide from ethyl acetoacetate followed by alkylation or acylation then hydrolysis followed by decarboxylation to form a derivate of acetic acid as a product.

Ethoxide is used as a base to form an enolate ion which in further reaction with the alkyl halide the alkylation occur means the removal of halide ion the alkyl group attached at the alpha position to the carbonyl.

It is the reaction that leads to the removal of the carbonyl group and releases carbon dioxide$\left({\mathrm{CO}}_2\right)$. Decarboxylation occurs by providing heat in the reaction.

1. Acidic hydrogen protonated
2. Formation of the enolate ion
3. Alkylation
4. Decarboxylation
5. Derivative of acetone

Mechanism