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Copper(I)–Taniaphos Catalyzed Enantiodivergent Hydroboration of Bicyclic Alkenes
Lee, Hyesu,Lee, Byoung Yoon,Yun, Jaesook American Chemical Society 2015 ORGANIC LETTERS Vol.17 No.3
<P>In this study, highly enantioselective copper(I)-catalyzed hydroboration of bicyclic alkenes is reported. Using a copper-taniaphos complex, excellent enantioselectivities up to >99% ee were obtained for bicyclic alkenes including oxa- and azabicyclic alkenes. Furthermore, copper-catalyzed enantiodivergent hydroboration methods with the same chiral ligand-copper precursors were developed using different boron sources based on alternative mechanistic pathways.</P>