5α,6α-epoxycholestane-3β,4β-diyl diacetate | 20951-81-9

• 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,6α-epoxycholestane-3β,4β-diyl diacetate
• 英文别名: [(1S,2R,5S,6S,7R,9S,11S,12S,15R,16R)-6-acetyloxy-2,16-dimethyl-15-[(2R)-6-methylheptan-2-yl]-8-oxapentacyclo[9.7.0.02,7.07,9.012,16]octadecan-5-yl] acetate
• CAS: 20951-81-9
• 化学式: C₃₁H₅₀O₅
• 分子量: 502.735
• InChiKey: NKGOCSUFGLWHEW-HYRKJANOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  8.1
• 重原子数：
  36
• 可旋转键数：
  9
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.94
• 拓扑面积：
  65.1
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  5α,6α-epoxycholestane-3β,4β-diyl diacetate 在 bismuth(lll) trifluoromethanesulfonate 、 lipase AY 、 sodium hydroxide 作用下， 以 乙醇 、 二氯甲烷 、 水 、 丙酮 、 甲苯 为溶剂， 反应 24.0h， 生成 4β,5α,6β-trihydroxycholestan-3β-yl acetate
  参考文献：
  名称：

  Selective Cytotoxicity of Oxysterols through Structural Modulation on Rings A and B. Synthesis, in Vitro Evaluation, and SAR

  摘要：

  Chemically diverse oxysterols were prepared and evaluated for cytotoxicity, aiming to push forward potency and selectivity. They were tested against seven cancer (HT-29, HepG2, A549, PC3, LAMA-84, MCF-7, and SH-SYSY) and two noncancerous cell lines (ARPE-19 and BJ). The influence of the oxidation pattern on rings A and B was studied. Oxygen functionalities on ring B, such as oxo, oxime, acetamide, acetate, and alkoxy, were evaluated. Most oxysterols were cytotoxic in the low micromolar range, with emphasis to the tetrols 14 and 34, the 6 beta methoxy and acetoxy derivatives 21 and 45, and the oxime 28. In general, the oxysterols were more toxic to cancer cells and a set of compounds (9, 14, 21, 28, 45) with very high selectivity was identified. The cytotoxicity of 3 beta-acetates was lower than that of the parent alcohols, although incubation for a longer period rendered them equally cytotoxic, pointing them as potential prodrugs of oxysterols.

  DOI：

  10.1021/jm200803d
• 作为产物：
  描述：

  cholest-5-ene-3β,4β-diyl diacetate 在 magnesium bis(monoperoxyphthalate)hexahydrate 作用下， 以 乙腈 为溶剂， 生成 5α,6α-epoxycholestane-3β,4β-diyl diacetate
  参考文献：
  名称：

  Selective Cytotoxicity of Oxysterols through Structural Modulation on Rings A and B. Synthesis, in Vitro Evaluation, and SAR

  摘要：

  Chemically diverse oxysterols were prepared and evaluated for cytotoxicity, aiming to push forward potency and selectivity. They were tested against seven cancer (HT-29, HepG2, A549, PC3, LAMA-84, MCF-7, and SH-SYSY) and two noncancerous cell lines (ARPE-19 and BJ). The influence of the oxidation pattern on rings A and B was studied. Oxygen functionalities on ring B, such as oxo, oxime, acetamide, acetate, and alkoxy, were evaluated. Most oxysterols were cytotoxic in the low micromolar range, with emphasis to the tetrols 14 and 34, the 6 beta methoxy and acetoxy derivatives 21 and 45, and the oxime 28. In general, the oxysterols were more toxic to cancer cells and a set of compounds (9, 14, 21, 28, 45) with very high selectivity was identified. The cytotoxicity of 3 beta-acetates was lower than that of the parent alcohols, although incubation for a longer period rendered them equally cytotoxic, pointing them as potential prodrugs of oxysterols.

  DOI：

  10.1021/jm200803d

文献信息

• Highly efficient epoxidation of unsaturated steroids using magnesium bis(monoperoxyphthalate) hexahydrate
  作者：João F.S. Carvalho、M. Manuel Cruz Silva、M. Luisa Sá e Melo

  DOI：10.1016/j.tet.2009.01.100

  日期：2009.4

  Fast generation of epoxides from the corresponding homoallylic and allylic steroidal olefins was developed by using magnesium bis(monoperoxyphthalate) hexahydrate (MMPP) as oxidant suspended in acetonitrile (CH3CN) at reflux temperature. The protocol involves the use of a safe readily available oxidant along with an easy work-up, which renders the process very efficient. Selective 4,5- and 5,6-epoxidations

  通过在回流温度下使用悬浮在乙腈（CH 3 CN）中的双（双过氧邻苯二甲酸酯）六水合镁（MMPP）作为氧化剂，可以从相应的均烯丙基和烯丙基甾体烯烃快速生成环氧化物。该方案涉及使用安全易得的氧化剂以及易于后处理的方法，这使该过程非常有效。据报道类固醇的选择性4，5-和5，6-环氧化。其中，Δ的高立体选择性环氧化5 -B去甲胆甾烷达到了。而且，该方法对5，6-位是化学选择性的，可用于环A烯酮的环氧化。
• Efficient Chemoenzymatic Synthesis, Cytotoxic Evaluation, and SAR of Epoxysterols
  作者：João F. S. Carvalho、M. Manuel Cruz Silva、João N. Moreira、Sérgio Simões、M. Luisa Sá e Melo

  DOI：10.1021/jm9003973

  日期：2009.7.9

  A library of diastereomerically pure epoxysterols, prepared by combining chemical and enzymatic methodologies, was evaluated for cytotoxicity toward human cancer and noncancer cell lines. Unsaturated steroids were oxidized by magnesium bis(monoperoxyphthal ate) hexahydrate in acetonitrile, and the resulting epimeric epoxides were enzymatically separated using Novozym 435 or lipase AY. Some of the synthesized epoxysterols have potent cytotoxicity and higher activity on cancer cell lines HT29 and LAMA-84.