Author/Authors :
Karikomi، نويسنده , , Michinori and Toda، نويسنده , , Mitsuru and Sasaki، نويسنده , , Yoshimi and Shibuya، نويسنده , , Masashi and Yamada، نويسنده , , Kenya and Kimura، نويسنده , , Takao and Minabe، نويسنده , , Masahiro and Hiratani، نويسنده , , Kazuhisa، نويسنده ,
Abstract :
The asymmetric coupling reaction of 2-hydroxybenzo[c]phenanthrenes by using Cu–chiral diamine under atmospheric air is described. The use of CuCl-(–)-sparteine and CuCl-cyclohexanediamine derivatives was found to be highly effective to give the helical quinone derivatives in a good yield with high percent enantiomeric excess.
Keywords :
Quinone , Asymmetric coupling , phenolic coupling , helicene , Chiral diamines
