Chemistry of O-silylated ketene acetals1: An efficient synthesis of α-thio--heterocycles from ω-amidosulfoxides by a novel intramolecular pummerer-type rearrangement
Treatment of ω-amidosulfoxides with -silylated keteneacetals in dry acetonitrile in the presence of a catalytic amount of zinc iodide causes a novel intramolecular Pummerer-type rearrangement to give α-thio--heterocycles in high yields.
ω-Carbamoylsulfoxides undergo a novel intramolecular Pummerer-type reaction with O-silylated ketene acetal in dry acetonitrile in the presence of a catalytic amount of zinc iodide to give α-thiolactams in good to excellent yields under nearly neutral conditions.
Lewis acid-promoted tandem desulfurization and hydroxylation of γ-phenylthio-substituted lactams: novel synthetic strategy of isoindolobenzazepine alkaloid, chilenine
and hydroxylation reactions to generate γ-hydroxylated lactams without the ring-opened products in extremely high yields, respectively. This process was further applied to the totalsynthesis of an isoindolobenzazepinealkaloid, chilenine, by featuring the elaboration of the functionalized phthalimide derivative.