A synthesis of 25-hydroxycholecalciferol-(26, 27-3H)
✍ Scribed by Philip A. Bell; W. Peter Scott
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- French
- Weight
- 293 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
The synthesis of 25‐hydroxycholecaleiferol‐(26, 27‐^3^H) is described. 25‐Oxo‐27‐norcholesta‐5, dien‐3β‐yl acetate is converted photochemically to 25‐oxo‐27‐norcholecalciferol‐3‐acetate, which is then reacted with tritiated methylmagnesium iodide and subsequently saponified to give 25‐hydroxycholecalciferol‐(26, 27‐^3^H).
📜 SIMILAR VOLUMES
A novel method for the preparation of side-chain extended analogues of vitamins \(D\) is described. Both 24,24-dihomo- and (22E)-22-dehydro-24,24-dihomo-25-hydroxycholecalciferols were efficiently prepared from the same intermediates, i.e., the phenyltriazolinedione adduct of previtamin D with a C-2
## Abstract (25S)–5α‐cholestane‐3β, 26‐diol [2,4,2′,4′–^3^H~4~] was synthesized by hydrogenation of neotigogenin acetate 2, followed by acetylation to (25S)‐5α‐furostane‐3β, 26‐diol diacetate 5; this was oxidized to (25S)–16–22‐dioxo‐5α‐cholestane‐3β, 26‐diol diacetate 6. Clemmensen reduction of th