5α-ergostanol-(3α) | 861958-55-6

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 类固醇和类固醇衍生物
• 英文名称: 5α-ergostanol-(3α)
• 英文别名: (24S)-24-Methyl-5α-cholestanol-(3α)；3α-Hydroxy-10.13-dimethyl-17β-((1R:4S)-1.4.5-trimethyl-hexyl)-5α-gonan；(10S)-3t-Hydroxy-10r.13c-dimethyl-17c-((1R:4S)-1.4.5-trimethyl-hexyl)-(5tH.8cH.9tH.14tH)-hexadecahydro-1H-cyclopenta[a]phenanthren；24β_F-Methyl-5α-cholestanol-(3α)；(3R,5S,8R,9S,10S,13R,14S,17R)-17-[(2R,5S)-5,6-dimethylheptan-2-yl]-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthren-3-ol
• CAS: 861958-55-6
• 化学式: C₂₈H₅₀O
• 分子量: 402.704
• InChiKey: ARYTXMNEANMLMU-PTZGCYQMSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  7.71
• 重原子数：
  29.0
• 可旋转键数：
  5.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  20.23
• 氢给体数：
  1.0
• 氢受体数：
  1.0

反应信息

• 作为反应物：
  描述：

  5α-ergostanol-(3α) 在 chromium(VI) oxide 、 溶剂黄146 作用下， 生成 di-(5α-ergostanylidene-(3))-hydrazine
  参考文献：
  名称：

  Measuring national ‘emerging technology’ capabilities

  摘要：

  如何衡量国家开发新兴技术的能力？我们使用 INSPEC 和 EI Compendex 类别代码来研究 33 个国家的研发活动。我们根据兰德公司的分类选择候选新兴技术。我们对这些技术进行筛选，以统计出那些近期研发成果发表率较高且不断上升的技术。由此得出的衡量指标显示出很强的趋同性；事实上，它们之间缺乏差异的情况令人不安。我们的测量结果表明，中国现在已成为可与德国、英国和法国相媲美的 "新兴技术 "研究大国。其他一些国家则明显缺乏研发活动，这对它们在高科技领域的长期竞争力提出了质疑。

  DOI：

  10.3152/147154302781781001
• 作为产物：
  描述：

  (3beta,5alpha)-麦角甾烷-3-醇 在 chromium(VI) oxide 、 乙醚 、 溶剂黄146 、 铂 作用下， 生成 5α-ergostanol-(3α)
  参考文献：
  名称：

  Thrust-Washer Evaluation of Self-Lubricating PS304 Composite Coatings in High Temperature Sliding Contact

  摘要：

  PS304 self-lubricating composite coatings were successfully deposited on steel substrates at various plasma spray facilities using mixtures blended from commercially obtained constituent particles. Coatings were evaluated in thrust-washer tests against Inconel X-750 at low contact pressures to 40kPa, sliding speed of 5.4m/s, and either ambient temperature or 500 degreesC chosen to simulate conditions in air foil bearings during startup and shutdown contact. Wear factors for all PS304 coatings tested, regardless of contact pressure and temperature, ranged from 1-3*10(-4) mm(3)/Nm while coefficients of friction of approximately mu = 0.5 were measured in all cases. While wear and friction behavior of PS304 in air foil bearings appear to have been simulated, surface roughening was observed in these thrust-washer tests which used continuous sliding contact, as opposed to the evolution of smoother surfaces observed in high-temperature foil bearings experiencing cyclic startup/shutdown. Wear-induced surface smoothening of PS304 was additionally simulated in thrust-washer tests with sliding contact instead imposed intermittently.

  DOI：

  10.1080/10402000208982579

文献信息

• Stoll, Hoppe-Seyler's Zeitschrift fur Physiologische Chemie, 1937, vol. 246, p. 1,14
  作者：Stoll

  DOI：——

  日期：——
• Windaus et al., Justus Liebigs Annalen der Chemie, 1930, vol. 477, p. 268,278
  作者：Windaus et al.

  DOI：——

  日期：——