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. 2013 Sep 5;14(15):1973–1981. doi: 10.1002/cbic.201300395

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© 2013 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Scheme 2 — Reagents: a) ImSO₂N₃⋅HCl, K₂CO₃, CuSO₄, MeOH; b) i: TsCl, pyridine, CH₂Cl₂; ii: NaI, DMF; iii: Ac₂O, C₅H₅N; c) DBU, THF; d) i: PBu₃, THF, H₂O; ii: (RCO)₂O; e) i: 3-chloroperbenzoic acid, CH₂Cl₂, BnOH; ii: NaOMe, MeOH; f) NH₄OAc, Pd(OH)₂/C, H₂, MeOH/H₂O (15:1).