Regioselective Derivatizations of a Tribrominated Atropisomeric Benzamide Scaffold
作者:Kimberly T. Barrett、Scott J. Miller
DOI:10.1021/ol503593y
日期:2015.2.6
The enantioselective synthesis of atropisomeric, tribrominated benzamides and subsequent regioselective transformations to afford derivatized, axially chiral molecules is reported. The enantioenriched tribromides were carried through sequential Pd-catalyzedcross-coupling and lithium–halogen exchange with high regioselectivity and enantioretention. A variety of complexity-generation functional group
Bifunctional Organocatalysts for the Enantioselective Synthesis of Axially Chiral Isoquinoline <i>N</i>-Oxides
作者:Ryota Miyaji、Keisuke Asano、Seijiro Matsubara
DOI:10.1021/jacs.5b04151
日期:2015.6.3
Bifunctional catalysts bearing amino and urea functional groups have been applied for a novel, highly enantioselective synthesis of axially chiral isoquinoline N-oxides, which are promising chiral ligands or organocatalysts in organic synthesis. This is the first example of highly enantioselective synthesis of axially chiral biaryls by bifunctional organocatalysts. Good-to-excellent enantioselectivities were obtained with a range of substrates.