Ergost-14-en-3β-yl-acetat | 4087-13-2

• 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: Ergost-14-en-3β-yl-acetat
• 英文别名: 3β-acetoxy-5α-ergost-14-ene；3β-Acetoxy-5α-ergost-14-en；Essigsaeure-(5α-ergosten-(14)-yl-(3β)-ester)；5α-Ergosten-(14)-yl-(3β)-acetat；(10S)-3c-Acetoxy-10r.13c-dimethyl-17c-((1R:4S)-1.4.5-trimethyl-hexyl)-(5tH.8cH.9tH)-Δ¹⁴-tetradecahydro-1H-cyclopenta[a]phenanthren；3β-Acetoxy-24β_F-methyl-5α-cholesten-(14)；beta-Ergostenol acetate；[(3S,5S,8R,9S,10S,13R,17R)-17-[(2R,5S)-5,6-dimethylheptan-2-yl]-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-3-yl] acetate
• CAS: 4087-13-2
• 化学式: C₃₀H₅₀O₂
• 分子量: 442.726
• InChiKey: CHMDHOMCAOHVQK-NBMKKGKXSA-N

物化性质

• 沸点：
  502.2±49.0 °C(Predicted)
• 密度：
  0.99±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  9.3
• 重原子数：
  32
• 可旋转键数：
  7
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.9
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  Ergost-14-en-3β-yl-acetat 在 氢氧化钾 作用下， 生成 (3beta,5alpha)-麦角甾-14-烯-3-醇
  参考文献：
  名称：

  The Role of Radial Clearance on the Performance of Foil Air Bearings

  摘要：

  Load capacity tests were conducted to determine how radial clearance variations affect the load capacity coefficient of foil air bearings. Two Generation III foil air bearings with the same design but possessing different initial radial clearances were tested at room temperature against an as-ground PS304 coated journal operating at 30000 rpm. Increases in radial clearance were accomplished by reducing the journal's outside diameter via an in-place grinding system. Front each load capacity test the bearing load capacity coefficient was calculated from the rule-of-thumb (ROT) model developed for foil air bearings.The test results indicate that, in terms of the load capacity coefficient, radial clearance has a direct impact on the performance of the foil air bearing. Each test bearing exhibited an optimum radial clearance that resulted in a maximum load capacity coefficient. Relative to this optimum value are two separate operating regimes that are governed by different modes of failure. Bearings operating with radial clearances less than the optimum exhibit load capacity coefficients that are a strong function of radial clearance and are prone to a thermal runaway failure mechanism and bearing seizure. Conversely, a bearing operating with a radial clearance m,ice the optimum suffered only a 20% decline in its maximum load capacity coefficient and did not experience any thermal management problems. However, it is unknown to what degree these changes in radial clearance had on other performance parameters, such (is the stiffness and damping properties of the bearings.

  DOI：

  10.1080/10402000208982578
• 作为产物：
  描述：

  (3b,22E)-麦角甾-5,7,22-三烯-3b-醇 3-乙酸酯 在 盐酸 、 氯仿 、 乙酸乙酯 、 铂 作用下， 生成 Ergost-14-en-3β-yl-acetat
  参考文献：
  名称：

  Wieland; Benend, Justus Liebigs Annalen der Chemie, 1943, vol. 554, p. 1,6

  摘要：

  DOI：

文献信息

• Antiwear Tribofilm Formation on Steel Surfaces Lubricated With Gear Oil Containing Borate, Phosphorus, and Sulfur Additives
  作者：K. Komvopoulos、V. Chiaro、B. Pakter、E. S. Yamaguchi、P. R. Ryason

  DOI：10.1080/10402000208982589

  日期：2002.1

  The formation of antiwear tribofilms plays a critical role in the longevity of automotive gears. The focus of this experimental study was on the lubrication efficacy of gear oils with different contents of borate-, phosphorus-, and sulfur-containing additives leading to the formation of protective tribofilms. Experiments were performed with AISI 52100 steel balls sliding against AISI 52100 steel disks in baths of different oils at ambient (similar to32degreesC) and elevated (similar to100degreesC) temperatures under load and speed conditions favoring sliding in the boundary lubrication regime. Friction coefficient responses accompanied by electrical contact voltage measurements provided real-time information about the formation and durability of the antiwear tribofilms. The wear resistance of the tribochemical films was quantified by wear rate data obtained from surface profilometry measurements of wear tracks on the disk specimens and sliding tests performed at ambient temperatures after the formation of the tribofilms during elevated-temperature sliding. Results indicate a strong dependence of tribofilm formation on temperature and type of additives. The slightly lower friction and higher wear resistance obtained at elevated temperatures with blended oils is attributed to the increased chemical reactivity of additives containing borate, phosphorus, and sulfur, leading to the formation of durable tribofilms. Relatively higher wear resistance and faster tribofilm formation were obtained with the borate-enriched gear oil formulations.
• Wieland; Coutelle, Justus Liebigs Annalen der Chemie, 1941, vol. 548, p. 270,281
  作者：Wieland、Coutelle

  DOI：——

  日期：——
• BETA-ERGOSTENOL
  作者：Merrill C. Hart、Harold Emerson

  DOI：10.1021/ja01342a030

  日期：1932.3
• 380. The application of the method of molecular rotation differences to steroids. Part X. “β-Dihydroergosterol.”
  作者：D. H. R. Barton、J. D. Cox、N. J. Holness

  DOI：10.1039/jr9490001771

  日期：——
• Laucht, Hoppe-Seyler's Zeitschrift fur Physiologische Chemie, 1935, vol. 237, p. 244
  作者：Laucht

  DOI：——

  日期：——