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fxhzfmcg

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These nanoparticle-supported chiral catalysts were used for enantioselective
asymmetric hydrogenation of aromatic ketones with very high enantiomeric excess values of up to 98.0%. The immobilized catalysts were recycled by magnetic decantation and reused up to 14 times without loss of activity and
enantioselectivity. These magnetic nanoparticles coupled with chiral catalysts are more accessible to the reactants because of their small size, and are to some extent similar to homogeneous asymmetric catalysts.
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jw227

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fxhzfmcg(金币+6,VIP+0): 9-16 16:11
fxhzfmcg(金币+3,VIP+0): 9-16 17:00
纳米粒子载体手性催化剂在不对称反应中的使用
芳香酮不对称加氢反应具有高达98.0%的对映体过量值。固定催化剂可以磁迁回收和重复使用达14次之多,而且活性和对映选择性都不减弱。手性催化剂和这些磁性纳米粒子在某些方面和均相不对称催化剂相似,而且因为它们颗粒小,比反应物更容易获得。
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