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Chem Commun (Camb). 2014 Dec 14;50(96):15171-4. doi: 10.1039/c4cc06501h.

The first calcium-catalysed Nazarov cyclisation.

Chemical communications (Cambridge, England)

Jacob Davies, Daniele Leonori

Affiliations

  1. School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, UK. [email protected].

PMID: 25333759 DOI: 10.1039/c4cc06501h

Abstract

The first calcium-catalysed Nazarov cyclisation is described. The Ca(NTf2)(PF6) complex is found to be a very active catalyst for 4π electrocyclisations. The remarkable catalytic activity of this complex is attributed to its increased Lewis acidity compared to other Ca complexes. Spectroscopic studies have provided an insight into the chelating interactions between the substrate and the Ca catalyst.

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