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. 2017 Jul 25;32(1):1012–1028. doi: 10.1080/14756366.2017.1350658

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© 2017 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Scheme 2. — Reagents and conditions: (a) MEM-Cl, DIPEA, anh. CH₂Cl₂, 5 h, 0 °C to r.t.; (b) LiOH*H₂O, THF/H₂O (2:1), 24 h, r.t.; (c) RH (1–5), DCC (EDAC for 38), DMAP, anh. CH₂Cl₂ (CHCl₃ for 38), 3–20 h, r.t.; (d) TFA, anh. CH₂Cl₂, 4–7 h, r.t.