**Synthesis of (±)‐α‐Chamigrene** __Cis__‐ and __trans__‐β‐ionol (__cis__ and __trans__‐**1**) underwent acid catalysed dehydration to a mixture of the tetraenes **2–5** in 70–80% yield (Table 1). Irradiation of this mixtures made the 6‐(__Z__), 8‐(__Z__)‐isomer **5** accessible (columns 3 and 4 in
Synthese von 1α-Hydroxycholecalciferol. Vorläufige Mitteilung
✍ Scribed by Andor Fürst; Ludvik Labler; Werner Meier; Karl-Heinz Pfoertner
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- German
- Weight
- 180 KB
- Volume
- 56
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
1α‐hydroxycholesterol (4a) was synthesized from cholesterol and transformed via its diacetyl derivative 4b into 1α, 3β‐diacetoxycholesta‐5, 7‐diene (6b). Irradiation of the ring‐B‐diene 6b followed by thermal isomerization and saponification gave 1α‐hydroxycholecalciferol (7).
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