2-Amino-2 -hydroxy-1,1 -binaphthyl NOBIN

A related approach has recently been reported by Belokon and Kagan et al. These workers used chiral TADDOL-type diols, derived from tartaric acid and 2-amino-2 -hydroxy-1,1 -binaphthyl (NOBIN), as catalysts to obtain yields of up to 95% and enantioselectivity up to 93% ee [59-61], The catalytically active species seem to be the sodium salts of the diols. 

The dendritic 2-amino-2/-hydroxy-l,l/-binaphthyl (NOBIN)-derived Schiff base ligands, displayed in Scheme 6, have been applied in the titanium-... 

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