Pd(II)-Catalyzed Enantioselective Oxidative Tandem Cyclization Reactions. Synthesis of Indolines through C−N and C−C Bond Formation
作者:Kai-Tai Yip、Min Yang、Ka-Lun Law、Nian-Yong Zhu、Dan Yang
DOI:10.1021/ja060291x
日期:2006.3.1
efficient Pd(II)-catalyzed enantioselectiveoxidative tandem cyclization strategy using molecular oxygen as a green oxidant for the double 5-exo-trig cyclizations of N-(2-allylaryl) amides to afford a variety of indolines in good yields without the formation of undesired monocyclization products. By employing Pd(TFA)2/(-)-sparteine as the chiral catalyst, we obtained tandem cyclization products with high enantioselectivity