立体中心
对映选择合成
化学
邻接
磷酰胺
催化作用
铱
双金属片
组合化学
立体化学
有机化学
DNA
生物化学
寡核苷酸
作者
Wei Wang,Fangqing Zhang,Yangbin Liu,Xiaoming Feng
标识
DOI:10.1002/anie.202208837
摘要
The diastereo- and enantioselective construction of vicinal all-carbon quaternary stereocenters is a formidable task. We here report a synergistic bimetallic catalysis via a chiral N,N'-dioxide-europium (Eu) complex and a phosphoramidite-iridium (Ir) catalyst for the asymmetric allylation of oxindole derivatives by using challenging trisubstituted allylic esters. The allylated products bearing vicinal all-carbon quaternary stereocenters were obtained with good diastereoselectivities (up to 20 : 1 dr) and excellent enantioselectivities (up to 99 % ee). Control experiments showed that the complementary diastereomers of the products were not accessible by the change of the stereochemistry of the chiral N,N'-dioxide ligand.
科研通智能强力驱动
Strongly Powered by AbleSci AI