Enantioselective Michael addition of malononitrile to chalcones catalyzed by a simple quinine–Al(OiPr)3 complex: a simple method for the synthesis of a chiral 4H-pyran derivative

Jian Shi, Min Wang, Ling He, Ke Zheng, Xiaohua Liu, Lili Lin, Xiaoming Feng
  • Chemical Communications, January 2009, Royal Society of Chemistry
  • DOI: 10.1039/b908632c