## 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‐hydroxycholecalci
1, 6-Addition von Chlorsulfonylisocyanat. Vorläufige Mitteilung
✍ Scribed by Albert Fischli; Hans Mayer; Willi Oberhänsli
- Publisher
- John Wiley and Sons
- Year
- 1974
- Tongue
- German
- Weight
- 236 KB
- Volume
- 57
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
A 1, 6‐addition of sulfonyl chloride isocyanate to 5, 7‐dimethyl‐8‐methylidene‐tricyclo[3.2.1.0^2,7^]oct‐3‐en‐6‐one (1) produced the new tricyclic skeleton of 4a, 6‐dimethyl‐2, 5‐dioxo‐2, 3, 4a, 5, 6, 8a‐hexahydro‐1__H__‐6, 4‐methenoquinoline‐1‐sulfonyl chloride (2). The structure of the new aza‐tricyclic species has been elucidated by X‐ray analysis.
📜 SIMILAR VOLUMES
**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