A New Entry for the Preparation of Substituted Aromatic Carbonyl Compounds Mediated by Samarium(II) Iodide
作者:Hidemi Yoda、Naoki Kohata、Kunihiko Takabe
DOI:10.1081/scc-120017130
日期:2003.1.5
Abstract A new route to substituted aromatic lactones and lactams via SmI2-promoted desulfurization is described. Direct replacement of the phenylthio substituent by hydroxyalkylated groups featuring the novel accessible process for the construction of continuous quaternary carbon centers could be accomplished when the same type of reactions was undertaken with carbonyl compounds in the presence of
Novel Chemoselective Desulfurization of γ-Phenylthio-Substituted Aromatic Lactams: Application to the Synthesis of Isoindolobenzazepine Alkaloid, Lennoxamine
作者:Hidemi Yoda、Takamasa Suzuki、Kunihiko Takabe
DOI:10.1055/s-2006-956452
日期:2006.12
Treatment of a variety of γ-phenylthio-substituted aromatic lactams with lithium aluminum hydride in the presence of cuprous iodide led to novel chemoselective desulfurization reactions to afford the corresponding substituted aromatic lactams without giving the carbonyl-reduced and/or ring-opened products in extremely high yields. This process was further applied to the total synthesis of an isoindolobenzazepine alkaloid, lennoxamine, by featuring the elaboration of the functionalized phthalimide derivative.