Michael Addition

CH₂(COOC₂H₅)₂ + CH₂=CHCOCH₃ → product

Aperçu

A Michael donor (stabilized carbanion) adds to the beta-carbon of a Michael acceptor (alpha,beta-unsaturated carbonyl). This 1,4-conjugate addition forms a new carbon-carbon bond and is complementary to 1,2-addition. The Michael reaction is one of the most versatile C-C bond forming reactions.

Exemple du quotidien

The Robinson annulation, combining Michael addition with aldol condensation, is used to build steroid ring systems in drug synthesis.

Importance industrielle

Michael additions are used extensively in pharmaceutical synthesis, polymer chemistry (acrylate polymerization), and in the synthesis of natural products.

Propriétés

Type: Organic
Réversible: Oui
Énergie: Exothermique
ΔH: -25,0 kJ/mol
Catalyseur: Base (e.g., NaOEt)

Réactions associées

Epoxidation of Alkenes (mCPBA) Swern Oxidation Oxidation of Secondary Alcohol to Ketone E2 Elimination (Dehydrohalogenation) Claisen Condensation (Ethyl Acetate) Aldol Condensation of Acetaldehyde Kolbe Electrolysis Baeyer-Villiger Oxidation Beckmann Rearrangement (Cyclohexanone Oxime) Dehydration of Ethanol

Frequently Asked Questions

What is the equation for Michael Addition?

The balanced equation is: CH₂(COOC₂H₅)₂ + CH₂=CHCOCH₃ → product.

What type of reaction is Michael Addition?

Michael Addition is a organic reaction. It is reversible under certain conditions.

Is Michael Addition exothermic or endothermic?

Michael Addition is exothermic (releases energy). The enthalpy change (ΔH) is -25.0 kJ/mol.

What conditions are needed for Michael Addition?

This reaction requires a catalyst (Base (e.g., NaOEt)).