A serial of biphenyl bisimidazolines containing both axial and central chirality have been synthesized for the first time. Compared with common method, Ullmann coupling methodology exhibited superior performance expecially for t-Bu substituted ligands. The obtained ligands were further applied in the Cu-catalyzed asymmetric cyclopropanation.
【基金】
supported by the National Natural Science Foundation of China(Nos.21528201,21672192);
the China Postdoctoral Science Foundation(No.2016M602254)~~
【更新日期】
2018-01-25
【分类号】
O621.251;O641.4
【正文快照】
1 Introduction(a)ORChiral transition-metal complexes have been extensivelyNinvestigated as promising homogeneous catalysts to providePPhOOFe2PPh2enantiomerically pure pharmaceuticals,agrochemicals,andNNNbulk materials.[1]To achieve efficient conversions a
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