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A simple and convenient synthesis of α-ionone, an important component of flowers and fragrances, is reported. The key step in the formation of the α,β-unsaturated ketone moiety involves an NHC-Au I catalyzed Meyer–Schuster-like rearrangement of readily prepared propargylic esters. The complex [{Au(IPr)} 2 (μ-OH)][BF 4 ] proved to be the most efficient catalyst leading to α-ionone...
A method for the syntheses of E-unsaturated acyclic nucleosides via a combination of palladium-catalyzed allylic alkylation and ruthenium-based cross metathesis is described. This approach provides a concise, efficient and reliable route to new nucleoside analogues.
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