Kuo Shen-Chun, Chen Frank, Hou Donald, Kim-Meade Agnes, Bernard Charles, Liu Jinchu, Levy Stacy, Wu George G
Chemical Process Research and Development, Schering-Plough Research Institute, 1011 Morris Avenue, Union, NJ 07083, USA.
J Org Chem. 2003 Jun 13;68(12):4984-7. doi: 10.1021/jo034380t.
A novel enantioselective alkylation of double benzylic substrates with secondary electrophiles is reported. A simple norephedrine-based chiral ligand was synthesized that gives alkylation product in 95% yield and 95% ee. A unique water effect on the enantioselectivity was unveiled. Good to excellent ee values were obtained with a number of double benzylic substrates and secondary electrophiles. This novel reaction has been applied to the synthesis of a promising anticancer agent.