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. 2021 Jul 30;22(15):8191. doi: 10.3390/ijms22158191

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© 2021 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 34 — Synthesis of 25-fluoro-VD₃ analogues via direct C25 fluorination from 25(OH)D₃ (A) and 1α,25(OH)₂D₃ (B) using DAST as a fluorinating reagent.