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Na* OEt Ethanol The double cyclization (above) proceeds by formation of an enolate followed by two successive intramolecular Michael reactions. Write a detailed mechanism for this reactio m on paper, then draw structural formulas for the reactant enolate and adduct enolate of the first Michael reaction in the window below. You do not have to consider stereochemistry. You do not have to explicitly draw H atoms. Do not clude lone pairs your answer. They w not be considered in the grading Draw enolates in the carbanion form. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate structures using the gn from the drop-down menu

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Et First Micheal addition OEt Second Micheal addition Keto form enol form

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