TiCl<sub>4</sub>-Promoted Tandem Carbonyl or Imine Addition and Friedel–Crafts Cyclization: Synthesis of Benzo-Fused Oxabicyclooctanes and Nonanes
作者:Arun K. Ghosh、Cuthbert D. Martyr、Chun-Xiao Xu
DOI:10.1021/ol300494q
日期:2012.4.20
A new and convenient synthesis of benzo-fused 8-oxabicyclo[3.2.1]octane and 9-oxabicyclo[4.2.1]nonane derivatives are described. The reaction involved a TiCl4-mediated tandem carbonyl or imine addition followed by a Friedel–Crafts cyclization to provide these functionalized derivatives in good to excellent yields and high diastereoselectivity.
描述了苯并稠合的 8-氧杂双环 [3.2.1] 辛烷和 9-氧杂双环 [4.2.1] 壬烷衍生物的新型便捷合成方法。该反应涉及 TiCl 4介导的串联羰基或亚胺加成,然后是 Friedel-Crafts 环化,以提供这些功能化的衍生物,收率非常好,并且具有高非对映选择性。