Dearomatizing Anionic Cyclization and Novel Skeletal Rearrangement: High Yield Formation of Multiply Substituted Bicyclic or Polycyclic Spirocyclopentadienes and Phenanthrene Derivatives from 4-Aryl 1-Lithio-1,3-butadienes
作者:Lantao Liu、Zhihui Wang、Fei Zhao、Zhenfeng Xi
DOI:10.1021/jo070160u
日期:2007.4.1
proceed in this reaction under similar conditions, with the former being faster even at −78 °C. However, when the reaction of 4-naphthyl 1-lithio-1,3-butadienes was carried out at higher temperatures, such as 75 °C, an interesting skeletalrearrangement took place to afford the vicinal attack products, tetrasubstituted phenanthrenes, via a dearomatization/rearomatization process. Mechanistic investigation