Bis binaphthol Borate Anion BNB

Asymmetric aziridination of styrene using the chiral anion BNB Cu(l) complex. 

3 Brief Introduction to DNA Discrimination by Octahedral Polypyridyl Metal Complexes 

The absence of a C2-symmetry along the helicoidal axis between the two complementary strands generates a major and a minor groove. 

2 Background on DNA Binding with Chiral Octahedral Metal Complexes - the [Ru(phen)3] Example 

Only in (b) and (c) modes of binding would one expect enantioselective binding or chiral discrimination between the A- and A-enantiomer. It is believed that chiral discrimination is even greater in the intercalative binding mode. 

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Yamamoto and coworkers reported the synthesis of Brpnsted acids of chiral borate anions 4.34 and 4.35 made or derived from enantiopure BINOL (1,L binaphthalenyl2,2 -diol). The Bis(binaphthol)borate anion BNB (4.34) is configurationally stable and was used as chiral counter anion with some Cu(l) complexes to promote enantioselective asymmetric aziridination of styrene by Andtsen and coworkers (Scheme 4.4). ... 

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