Enantioselective Pd-catalyzed tandem allylic alkylation reaction using monodentate phosphoramidite ligands for the formal total synthesis of huperzine A??

Organic Chemistry Frontiers Pub Date: 2014-08-20 DOI: 10.1039/C4QO00180J

Abstract

A small library of fine-tunable monodentate phosphoramidite (MPN) ligands was found useful in selecting a highly efficient chiral ligand for the enantioselective Pd-catalyzed tandem allylic alkylation reaction. The reaction gave a critical tricyclic key intermediate with high enantiopurity for the formal total synthesis of (?)-huperzine A, a Lycopodium alkaloid derived from the club moss Huperzia serrata that possesses potent inhibitory activity against acetylcholine esterase (ACHe).

Graphical abstract: Enantioselective Pd-catalyzed tandem allylic alkylation reaction using monodentate phosphoramidite ligands for the formal total synthesis of huperzine A
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