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Updated: Jun 4, 2026

Facile Preparation of (2Z,4E)-Dienamides by the Olefination of Electron-deficient Alkenes with Allyl Acetate
Published on: June 21, 2017
Cu(I) complexes containing a multidentate and conformationally flexible dibenzylidene acetone ligand (dbathiophos):
Amanda G Jarvis1, Adrian C Whitwood, Ian J S Fairlamb
1Department of Chemistry, University of York, Heslington, York, UK, YO10 5DD.
Abstract:
The synthesis and characterisation of a multidentate conformationally flexible ligand based on the dibenzylidene acetone core structure, dbathiophos (1), is described. Ligand 1 has a high affinity for cationic and neutral Cu(I) species. Three unique Cu(I) complexes (4-6) are reported showing that the ligand backbone of dbathiophos is hemilabile, and able to adopt different 1,4-dien-3-one conformational geometries around Cu(I). Complexes 4 and 6 both effectively catalyse the cyclopropanation of styrene with ethyl diazoacetate at low catalyst loadings (1 mol% Cu).
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