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1H NMR spectroscopy.
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74
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25144488601
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note
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2 were obtained (95% conversion, d.r. = 7:1 and 80% ee at 0°C); MeCN also led to reasonable results (94 % conversion, d.r. = 6:1 and 77% ee at -20°C).
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75
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25144486668
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note
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Compounds 7c and 7g were slightly unstable, which can account for the lower yield of isolation of these compounds.
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The Cambridge Crystallographic Data Centre (CCDC) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from the CCDC via www.ccdc.cam.ac.uk/data_request/cif.
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