Tetrahedron Letters p. 411 - 414 (1998)
Update date:2022-08-29
Topics:
He, Xu-Chang
Wang, Bin
Bai, Donglu
A bridged bicyclic compound 8, the key intermediate for the synthesis of huperzine A (1), was prepared by asymmetric palladium-catalyzed bicycloannulation of β-keto ester 2. A variety of chiral ligands and reaction conditions were tested. 52% ee values were observed.
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