SCHEDULED MAINTENANCE
Michael reactions of chiral lithioenamines of α-alkyl β-oxo esters with methyl ethylidenemalonate afforded, after hydrolysis, adducts having contiguous quaternary and tertiary carbon centres, with nearly complete enantio- and diastereo-selectivity.
K. Tomioka, K. Yasuda and K. Koga, J. Chem. Soc., Chem. Commun., 1987, 1345 DOI: 10.1039/C39870001345
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