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Synthesis 1986; 1986(6): 476-480
DOI: 10.1055/s-1986-31679
DOI: 10.1055/s-1986-31679
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Direct 4-Alkylation of 1,3-Cyclohexanediones via Dianionic Species
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Publication History
Publication Date:
20 August 2002 (online)
1,3-Cyclohexanediones are directly alkylated at the 4 position via dianionic species generated at - 78°C using lithium diisopropylamide/hexamethylphosphoric triamide. Acetylation of the reaction products at room temperature yields the 3-acetoxy-6-alkylcyclohex-2-enones selectively.