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Enantiocontrolled reduction of prochiral ketones with borane in the presence of new enantiomerically pure bi-and tricyclic β-sec-amino alcohols 2–5 as stereodifferentiating catalysts afforded the optically active corresponding secondary alcohols in moderate to excellent (up to 98 % op) optical yields.
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Wilken et al. (1996) studied this question.
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