The title compound was synthesized by alkylation of the dianion of methyl acetoacetate, and lithium dimethylcuprate addition to the enol phosphate of the alkylated β-keto esters (2) and (6) to produce the tri-substituted αβ-unsaturated esters (4) and (7) in a stereoselective manner.
F. W. Sum and L. Weiler, J. Chem. Soc., Chem. Commun., 1978, 985 DOI: 10.1039/C39780000985
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