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. 2023 Nov 13;28(22):7571. doi: 10.3390/molecules28227571

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© 2023 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 (https://creativecommons.org/licenses/by/4.0/).

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Scheme 1 — Synthesis of glucuronic acid donors 11–13. Reagents and conditions: i: 1. MTBTP, BF₃·Et₂O, DCM, 2. MeONa, MeOH, 3. 4-anisaldehyde, HC(OMe)₃, CSA, CH₃CN; ii: 1. BnBr, NaH, DMF, 2. TFA, 3. BAIB, TEMPO, DCM/H₂O 5:1, 0 °C, 4. MeI, K₂CO₃, DMF; iii: a. TBSOTf, NEt₃, DCM; b. PicoA, DCC, DMAP, DCM; c. BzCl, NEt₃, DCM iv: 1. NBS, H₂O/acetone, 2. TCAN, Cs₂CO₃, DCM.