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5α-cholest-8(14)-en-3β-ol and three 24-alkyl-Δ8(14) -sterols from the bulbils of Dioscorea batatas

✍ Scribed by Toshihiro Akihisa; Noriko Tanaka; Takao Yokota; Noriaki Tanno; Toshitake Tamura

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
435 KB
Volume
30
Category
Article
ISSN
0031-9422

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Inhibitors of sterol synthesis. Synthesi
Inhibitors of sterol synthesis. Synthesis of [2,4-3H]5α-cholest-8(14)-ene-3β,7α,15α-triol and [2,4-3H]5α-cholest-8(14)-en-38-ol-15-one
✍ Edward J. Parish; George J. Schroepfer Jr. 📂 Article 📅 1981 🏛 John Wiley and Sons 🌐 French ⚖ 301 KB

## Abstract Oxidation of 5α‐cholest‐8(14)‐ene‐3β,7α,15α‐triol with silver carbonate‐celite gave 5α‐cholest‐8(14)‐ene‐7α,15α‐diol‐3‐one in 88% yield. Treatment of the latter compound with tritiated water under basic conditions gave a labeled product which was reduced with lithium tri‐__tert__‐butoxy

Concerning the structure of 3β-benzoylox
Concerning the structure of 3β-benzoyloxy-5β-cholesta-8,14-diene, a major byproduct in the chemical synthesis of 5α-cholest-8(14)-en-3β-ol-15-one
✍ David K. Wilson; William K. Wilson; Florante A. Quiocho; George J. Schroepfer Jr 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 659 KB

The X-ray crystal structure of 3~-(p-bromobenzoyloxy)-5~-cholesta-8,14-diene (space group P21, a = 10.698 ,/~, b = 9.487 .~, c = 15.024 A, ~ = 96.05 °, Z = 2) was determined by the heavy atom method and refined to R = 0.075. This heavy atom derivative was synthesized from 5~-cholesta-8,14-dien-31~-o

Crystal structure of 3β-benzoyloxy-6α-ch
Crystal structure of 3β-benzoyloxy-6α-chloro-5α-cholest-7-ene, a key intermediate in the chemical synthesis of 5α-cholest-8(14)-en-3β-ol-15-one
✍ David K. Wilson; William K. Wilson; Florante A. Quiocho; George J. Schroepfer Jr 📂 Article 📅 1988 🏛 Elsevier Science 🌐 English ⚖ 441 KB

The X-ray crystal structure of 3~-benzoyloxy-6a-chloro-5a-cholest-7-ene (IV) was determined by the heavy atom method and ref'med to R ---0.063 (space group P2s, a --11.364, b = 11.089, c --12.232,/~ = 99.43 °, Z ---2). IV was previously shown to be an important intermediate in the acid-catalyzed iso