Phosphine catalyzed enantioselective [3+2] cyclizations on 4-substituted 2,6-diarylidenecyclohexanones and 2,4-diarylidene-bicyclo[3.1.0]hexan-3-ones take place with high diastereo- and enantioselectivity levels. The process affords spirocyclic compounds with excellent stereochemical control of up to five stereogenic centres.
![Graphical abstract: Organocatalytic enantioselective desymmetrization of cyclic enonesviaphosphine promoted [3+2] annulations](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C0CC03164J&imageInfo.ImageIdentifier.Year=2011)
N. Pinto, P. Retailleau, A. Voituriez and A. Marinetti, Chem. Commun., 2011, 47, 1015 DOI: 10.1039/C0CC03164J
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