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- W2088895905 abstract "New chiral ferrocenylphosphine ligands were designed and tested in the enantioselective bicycloannulation of β-keto-ester 2 with bifunctional allylic agent 4. A range of e.e. values from 80 to 90% of the bicyclic intermediate 6 was achieved. Subsequently, enantiopure (−)-huperzine A was prepared in ca. 40% yield from β-keto-ester 2." @default.
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- W2088895905 date "2001-12-01" @default.
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- W2088895905 title "Studies on the asymmetric synthesis of huperzine A. Part 2: Highly enantioselective palladium-catalyzed bicycloannulation of the β-keto-ester using new chiral ferrocenylphosphine ligands" @default.
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- W2088895905 doi "https://doi.org/10.1016/s0957-4166(02)00006-x" @default.
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