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Although the wisdom in using chloroform as a solvent with a strong base such as CsOH might be questionable since dichlorocarbene can be formed, an unexpected side reaction was not detected at all. Importantly, we have ascertained that environmentally benign trifluorotoluene can be used as a solvent in this transformation without any loss of the yields and enantioselectivity. (Figure Presented)
-
Although the wisdom in using chloroform as a solvent with a strong base such as CsOH might be questionable since dichlorocarbene can be formed, an unexpected side reaction was not detected at all. Importantly, we have ascertained that environmentally benign trifluorotoluene can be used as a solvent in this transformation without any loss of the yields and enantioselectivity. (Figure Presented)
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CCDC 763815 ((R)-1g) 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 763815 ((R)-1g) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data-request/cif
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77955318712
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CCDC 738896 (3 f) 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 738896 (3 f) contains the supplementary crystallographic data for this paper. These data can be obtained free of charge from The Cambridge Crystallographic Data Centre via www.ccdc.cam.ac.uk/data-request/cif
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