Functionalized organolithium compounds: Generation via reductive lithiation and nucleophilic addition to N-phenethylimides. Access to functionalized dihydropyrrolo[2,1-a]isoquinolinones
作者:Izaskun Manteca、Begoña Etxarri、Ainhoa Ardeo、Sonia Arrasate、Iñaki Osante、Nuria Sotomayor、Esther Lete
DOI:10.1016/s0040-4020(98)00745-5
日期:1998.10
sulfides. Nucleophilic addition of 4-lithio-2-(trimethylsilylmethyl)but-1-ene 1 and 2-(3-lithiopropyl)-2-trimethylsilyl-1,3-dithiane 2 thus prepared to N-phenethyl-cis-norbor-5-en-2,3-dicarboximide 9 afforded the corresponding α-hydroxy lactams in good yields. Besides, access to C-10b substituted α,β-unsaturated pyrroloisoquinolinones 3 was efficiently achieved via a tandem organolithium nucleophilic addition
产生1,4-二价阴离子的方法包括由4,4-二叔丁基联苯化物诱导的官能化苯硫醚的还原锂化。由此制备的4-锂硫基-2-(三甲基甲硅烷基甲基)丁-1-烯1和2-(3-硫基丙基)-2-三甲基甲硅烷基-1,3-二噻吩2的亲核加成反应是N-苯乙基-顺式-norbor-5- en-2,3-二甲叉酰亚胺9以良好的产率提供了相应的α-羟基内酰胺。此外,通过串联有机锂亲核加成-N可以有效地获得C-10b取代的α,β-不饱和吡咯并异喹啉酮3-酰基亚胺离子环化序列和随后的逆狄尔斯-阿尔德反应。该方法可以扩展到官能化的有机锂,但是如果存在烯丙基硅烷部分,则N-酰亚胺化环化将失败。