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Novel Ru(II) complexes enhance enantioselectivity in asymmetric reductions of ketones, suggesting potential for improved catalytic applications.
A series of novel enantiopure Ru(II) complexes containing a chiral diamine and η 6 -arene connected by a tethering group have been prepared and were evaluated in the asymmetric reductions of a range of ketones. Changes to the level of steric hindrance and the addition of an electron-withdrawing functionality on the sulfonyl group have a significant effect on the reactivity and enantioselectivity of the catalysts.
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Hodgkinson et al. (2014) studied this question.
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