Bu2SnIH-Promoted Proximal Bond Cleavage of Methylenecyclopropanes and Successive Radical Cyclization and/or Pd-Catalyzed Coupling Reaction
摘要:
The unprecedented regioselective hydrostannation of methylenecyclopropanes to give vinyltins was achieved using dibutyliodotin hydride (Bu2SnIH), which could be applied to intramolecular radical cyclization.
In the presence of TiCl4, methylenecyclopropane (1a) easily reacted with aliphatic aldehydes to give the β-(chloromethyl)allylated products 2 in good yields along with a small amount of the methylenetetrahydrofurans 3. The reaction with chiralα- and β-alkoxyaldehydes proceeded with high levels of chelation control.
Bu<sub>2</sub>SnIH-Promoted Proximal Bond Cleavage of Methylenecyclopropanes and Successive Radical Cyclization and/or Pd-Catalyzed Coupling Reaction
作者:Naoki Hayashi、Yusuke Hirokawa、Ikuya Shibata、Makoto Yasuda、Akio Baba
DOI:10.1021/ja7103729
日期:2008.3.1
The unprecedented regioselective hydrostannation of methylenecyclopropanes to give vinyltins was achieved using dibutyliodotin hydride (Bu2SnIH), which could be applied to intramolecular radical cyclization.