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While this manuscript was being prepared an interesting report from Luo and Cheng appeared that demonstrated that a magnetic nanoparticle-supported trans-1,2-diaminocyclohexane-derived catalyst could promote highly enantioselective aldol reactions with good catalyst recyclability. The catalyst was active at 20 mol, levels and was shown to be recyclable over 11 cycles. A significant drop in selectivity (particularly diastereoselectivity) was observed after 8 runs and the overall drop in product yield and ee over the 11 runs was 8, and 9, respectively. See ref, 4w
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While this manuscript was being prepared an interesting report from Luo and Cheng appeared that demonstrated that a magnetic nanoparticle-supported trans-1,2-diaminocyclohexane-derived catalyst could promote highly enantioselective aldol reactions with good catalyst recyclability. The catalyst was active at 20 mol % levels and was shown to be recyclable over 11 cycles. A significant drop in selectivity (particularly diastereoselectivity) was observed after 8 runs and the overall drop in product yield and ee over the 11 runs was 8 % and 9 %, respectively. See ref. [4w].
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67049092417
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See the Supporting Information for details. These nanoparticles have been characterized by FTIR and Raman spectroscopy, XRD patterns, and TEM analysis
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See the Supporting Information for details. These nanoparticles have been characterized by FTIR and Raman spectroscopy, XRD patterns, and TEM analysis.
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81
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0019541337
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R. Massart, IEEE Trans. Magn. 1981, 17, 1247; b X. P. Qiu, Chin. J. Chem. 2000, 18, 834.
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a) R. Massart, IEEE Trans. Magn. 1981, 17, 1247; b) X. P. Qiu, Chin. J. Chem. 2000, 18, 834.
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83
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67049090136
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The enantioselectivity of the processes was particularly consistent: the standard deviation in the s-factor data over the 20 cycles is 0.5
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The enantioselectivity of the processes was particularly consistent: the standard deviation in the s-factor data over the 20 cycles is 0.5.
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