(2) H EtO⁻ (3) CH₃ EtO⁻ (4) OEt [1] hydrate [2] decarboxylate (5) H [1] OH⁻ [2] CH₃CH₂CH₂Br [3] OH⁻, H₂O (Gabriel Synthesis) (6) CH₃O H CH₃ EtO⁻
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**Reaction (2):** This is a Michael addition followed by an intramolecular aldol condensation (Robinson Annulation). The starting materials are 1,3-cyclohexanedione and an α,β-unsaturated aldehyde (2-butenal). The base is EtO⁻. **Step 1.1: Michael Addition** The Show more…
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