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Proline-Based P,N Ligands in Palladium-Catalyzed Asymmetric pi-Allyl Additions

, : Proline-Based P,N Ligands in Palladium-Catalyzed Asymmetric pi-Allyl Additions. Angewandte Chemie 38(18): 2750-2752

Excellent yields and at least 95 % ee can be achieved for the addition of dimethyl malonate to cycloalkenyl acetates by using a palladium complex of the new phosphanyldihydrooxazole ligand L as a catalyst (see scheme). The ligand L can be synthesized from commercially available trans 4-hydroxy-L-proline in four steps. BOC=tert-butoxycarbonyl.


PMID: 10508370

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