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. 2020 Dec 18;25(24):6019. doi: 10.3390/molecules25246019

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© 2020 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Scheme 8 — Synthesis of glycoconjugates type V–VII according to Strategy II. Reagents and Conditions: (i) CuSO₄·5H₂O, NaAsc, i-PrOH/THF/H₂O, r.t., 24 h, mol. ratio 6/10a/CuSO₄·5H₂O/NaAsc, 1:1:0.5:1.1; 7/10a/CuSO₄·5H₂O/NaAsc, 1:2:1.1:0.6; (ii) propargyl alcohol, CuSO₄·5H₂O, NaAsc, i-PrOH/THF/H₂O (1.6:1:1.1, v/v/v), r.t., 24 h, mol ratio 7/C₃H₄O /CuSO₄·5H₂O/NaAsc, 1:3:1.2:2.2.