Enantioselective Bromoaminocyclization of Allyl <i>N</i>-Tosylcarbamates Catalyzed by a Chiral Phosphine–Sc(OTf)<sub>3</sub> Complex
作者:Deshun Huang、Xiaoqin Liu、Lijun Li、Yudong Cai、Weigang Liu、Yian Shi
DOI:10.1021/ja4010877
日期:2013.6.5
An effective enantioselectivebromoaminocyclization of allyl N-tosylcarbamates catalyzed by a chiral phosphine-Sc(OTf)3 complex is described. A wide variety of optically active oxazolidinone derivatives containing various functional groups can be obtained with high enantioselectivities.
ligands for Pd(II)-catalyzed asymmetric intramolecular allylic C–H amination reactions. The use of metal-containing Schiff base ligands allows tuning the selectivity and reactivity of the Pd(II)-catalyst, whereby a Schiff base-Cu(II)/sulfoxide ligand in combination with Pd(OAc)2 showed the best performance. Both internal and terminal alkenes were applicable, and the C–H amination products were obtained in