Oxidative coupling of 9-phenanthrol (1) with a (–)-(R)-1,2-diphenylethylamine-copper(II) complex yielded (–)-(S)-10,10′-dihydroxy-9,9′-biphenanthryl (2)(98% optical purity)′ the chiral aluminium hydride reagent modified by (2) was found to exhibit enantioface selectivity towards a variety of prochiral compounds.
K. Yamamoto, H. Fukushima and M. Nakazaki, J. Chem. Soc., Chem. Commun., 1984, 1490 DOI: 10.1039/C39840001490
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