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. 2015 Oct 29;2015(34):7544–7549. doi: 10.1002/ejoc.201501249

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© 2015 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

© 2015 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution Non-Commercial License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited and is not used for commercial purposes.

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scheme 1 — C–O bond formation with HBF₄ at room temperature.^[a] dr = diastereoisomeric ratio. [a] Isolated yields; ¹H NMR conversions are provided in parentheses when lower than 95 %. [b] 51 % ¹H NMR conversion into dimer 3a.