ChemInform Abstract: Acid-Mediated [3 + 3] Cycloaddition of -EWG--Formyl Ketene-S,S-acetals and -Carbamoyl Ketene-S,S-acetals: A New Approach to 2-Pyridone Derivatives.
文摘
This novel 2-pyridone synthesis involves sequential Baylis—Hillman reaction, intramolecular cycloaddition, Michael addition, followed by an alkylthiol elimination process.