Abstract
Abstract Diastereoselective allylation of camphorpyrazolidinone derived α-ketoamides was examined using allyltributyltin in the presence of various Lewis acids. The corresponding optically enriched quarternary α-hydroxy carbonyls were obtained in reasonable to excellent material yields (51–95%) and with practical levels of stereoselectivity (up to >95% de) when a stoichiometric amount of Sn(OTf) 2 was used. The stereochemical induction is discussed.
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