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.
在碘化亚铜存在下,用氢化铝锂处理各种δ-苯硫基取代的芳香族内酰胺,可产生新的化学选择性脱硫反应,从而得到相应的取代芳香族内酰胺,且不产生羰基还原和/或开环产物,收率极高。这一工艺还被进一步应用于异吲哚苯并氮杂卓生物碱--伦诺沙明的全合成,其特点是可以制备功能化邻苯二甲酰亚胺衍生物。