Highly enantioselective [4 + 2] annulations catalyzed by amino acid-based phosphines: Synthesis of functionalized cyclohexenes and 3-spirocyclohexene-2-oxindoles

Fangrui Zhong, Xiaoyu Han, Youqing Wang, Yixin Lu
  • Chemical Science, January 2012, Royal Society of Chemistry
  • DOI: 10.1039/c2sc00963c