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Cooperative catalysis using bifunctional organocatalysts
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Cooperative catalysis using bifunctional organocatalysts
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78449260377
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the presence of tetraethyleneglycol, the fluorination reactions proceeded unprecedentedly fast and were completed within 1.5 h, affording the fluorinated product in quantitative yields. Moreover, under microwave conditions, the reaction was completed within a minute. In contrast to these results, in organic solvents and even in the presence of crown ethers, the fluorination reaction gave only 4% yield after the same reaction time., - 7822
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In the presence of tetraethyleneglycol, the fluorination reactions proceeded unprecedentedly fast and were completed within 1.5 h, affording the fluorinated product in quantitative yields. Moreover, under microwave conditions, the reaction was completed within a minute. In contrast to these results, in organic solvents and even in the presence of crown ethers, the fluorination reaction gave only 4% yield after the same reaction time., J. W. Lee, H. Yan, H. B. Jang, H. K. Kim, S.-W. Park, S. Lee, D. Y. Chi, C. E. Song, Angew. Chem. 2009, 121, 7819 - 7822
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78449247132
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Examples for organocatalytic enantioselective silylation of alcohols
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Examples for organocatalytic enantioselective silylation of alcohols
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78449264340
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note
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2 (s=10). For more experimental results, see Table S-2 in the Supporting Information.
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25
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78449259263
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This result is in agreement with our recent study on nucleophilic fluorination reactions using bis(hydroxy) polyethers and KF
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This result is in agreement with our recent study on nucleophilic fluorination reactions using bis(hydroxy) polyethers and KF.
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26
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78449247500
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CCDC 777372 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via
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CCDC 777372 contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via.
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78449263778
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note
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To understand the effect of halogen substituents on the catalytic activity and enantioselectivity in more detail and to explain the observed sense of stereoselectivity, computational studies are currently underway in our laboratory.
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