Formation of carbon–carbon bonds by ring closure of β-phenylselenocrotonates

Abstract
Successive treatment of olefins with PhSeCl and silver crotonate affords β-phenylselenocrotonates which, on reaction with triphenyltin hydride in the presence of azobisisobutyronitrile, are converted into γ-lactones by a process that introduces a new carbon–carbon bond.

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