L-Alaninylated Betti Bases as Catalysts for the Asymmetric Michael Addition Reaction of Cyclohexanone to Nitroolefins
JIAO Chong-Jun; SHEN Zong-Xuan; WU Guo-Feng; ZHU Jin-Long; ZHANG Ya-Wen*
Acta Chimica Sinica . 2007, (16): 1631 -1637 .