6β-methoxy-3α,5-cyclo-5α-23,24-bisnorcholan-22-carbaldehyde | 73583-09-2

• 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: 6β-methoxy-3α,5-cyclo-5α-23,24-bisnorcholan-22-carbaldehyde
• 英文别名: 3α,5-cyclo-6β-methoxy-24-norcholan-23-al；(3R)-3-[(1S,2R,5R,7R,8R,10S,11S,14R,15R)-8-methoxy-2,15-dimethyl-14-pentacyclo[8.7.0.02,7.05,7.011,15]heptadecanyl]butanal
• CAS: 73583-09-2
• 化学式: C₂₄H₃₈O₂
• 分子量: 358.565
• InChiKey: WGXSOWIDZMLGTJ-RWNQQKCBSA-N

物化性质

• 沸点：
  446.6±18.0 °C(Predicted)
• 密度：
  1.06±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.9
• 重原子数：
  26
• 可旋转键数：
  4
• 环数：
  5.0
• sp3杂化的碳原子比例：
  0.96
• 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：

  6β-methoxy-3α,5-cyclo-5α-23,24-bisnorcholan-22-carbaldehyde 在 sodium hydroxide 、 苄基三乙基氯化铵 、 间氯过氧苯甲酸 、 二苯基膦酸锂 、 碘甲烷 作用下， 生成 (23S,24R)-23,24-(dichloromethylene)-6β-methoxy-3α,5-cyclo-5α-cholestane
  参考文献：
  名称：

  海洋无脊椎动物中的次要和痕量固醇48. 23（R），24（R）-亚甲基胆固醇的分离，结构解析和合成。

  摘要：

  描述了23（R），24（R）-亚甲基胆固醇-一种可能的油菜素生物合成前体-的分离，结构测定和合成。

  DOI：

  10.1016/s0040-4039(01)81608-7
• 作为产物：
  描述：

  (3alpha,5R,6beta,20S)-6-甲氧基-3,5-环孕烷-30-甲醇4-甲基苯磺酸酯 在 二异丁基氢化铝 作用下， 以 N,N-二甲基甲酰胺 、 甲苯 为溶剂， 反应 5.5h， 生成 6β-methoxy-3α,5-cyclo-5α-23,24-bisnorcholan-22-carbaldehyde
  参考文献：
  名称：

  制备 (25)- 和 (25)-26- 功能化类固醇作为胆酸生物合成研究的工具

  摘要：

  从豆甾醇或 (20S) 开始，描述了在环 A 中含有 3β-羟基-Delta(5)-或 Delta(4)-3-酮基官能团的 26-胆甾烷酸和 26-醇的差向异构形式的新合成)-3β-乙酰氧基-pregn-5-en-20-羧酸。所得化合物可用作研究胆酸的标准品。侧链的构建是通过将甾体 23-碘化物连接到由 (2R)- 和 (2S)-3-羟基-2-甲基丙酸酯制备的砜来实现的。使用由 TEMPO 和漂白剂催化的亚氯酸钠，将中间体 26-醇氧化成相应的羧酸，确保保留 C-25 的立体化学和环状部分的官能团。

  DOI：

  10.1016/j.steroids.2005.02.014

文献信息

• First total synthesis of xestobergsterol A and active structural analogues of the xestobergsterols
  作者：Michael E Jung、Ted W Johnson

  DOI：10.1016/s0040-4020(00)01086-3

  日期：2001.2

  The novel pentacyclic polyhydroxylated sterol, xestobergsterol A la, a strong inhibitor of histamine release from rat mast cells induced by anti-IgE, has been synthesized in 24 steps and good overall yield From stigmasterol 7. The Breslow remote functionalization process has been extended to several more highly functionalized steroid derivatives, especially those with oxygen functionality in the B-ring. The key steps of the synthesis of xestobergsterol A la and its analogues, 7-deoxyxestobergsterol A Id and 16,23-seco-23-deoxyxestobergsterol A 73, are the Breslow remote functionalization of oxygenated steroids and for compounds la and Id, a novel base-catalyzed epimerization-aldol condensation of a dione to give the desired CD-cis ring structure of the xestobergsterols. Thus the known alcohol 75, prepared from stigmasterol 7, was taken to the tetraacetate 107 which was then converted via a Breslow remote functionalization into the alkene aldehyde 114 which was transformed in 5 steps to xestobergsterol A la. Testing of the synthetic materials showed that the two analogues, 7-deoxyxestobergsterol A Ib and 16,23-seco-23-deoxyxestobergsterol A 73, are also potent inhibitors of histamine release with ICS, values (IC50 500 nM and 750 nM, respectively) being only 1015 times less than that of xestobergsterol A itself (50 nM). (C) 2001 Elsevier Science Ltd. All rights reserved.
• Stereochemical effects in cyclopropane ring openings: synthesis and isomerization of petrosterol and all three of its trans cyclopropane diastereomers
  作者：John R. Proudfoot、Carl Djerassi

  DOI：10.1021/ja00331a035

  日期：1984.9
• Synthesis of (23R)- and (23S)-methylcholesterol
  作者：Huiting Li、Ian J. Massey、Dale C. Swenson、William L. Duax、Carl Djerassi

  DOI：10.1021/jo00149a010

  日期：1983.1
• Proudfoot, John R.; Djerassi, Carl, Journal of the Chemical Society. Perkin transactions I, 1987, p. 1283 - 1290
  作者：Proudfoot, John R.、Djerassi, Carl

  DOI：——

  日期：——
• Preparation of (25)- and (25)-26-functionalized steroids as tools for biosynthetic studies of cholic acids
  作者：V KHRIPACH、V ZHABINSKII、O KONSTANTINOVA、N KHRIPACH、A ANTONCHICK、A ANTONCHICK、B SCHNEIDER

  DOI：10.1016/j.steroids.2005.02.014

  日期：2005.7

  new synthesis of both epimeric forms of 26-cholestanoic acids and 26-alcohols containing a 3beta-hydroxy-Delta(5)- or a Delta(4)-3-keto-functionality in ring A is described starting from stigmasterol or (20S)-3beta-acetoxy-pregn-5-en-20-carboxylic acid. The obtained compounds are useful as standards for studies of cholic acids. Construction of the side chain was achieved by linkage of steroidal 23-iodides

  从豆甾醇或 (20S) 开始，描述了在环 A 中含有 3β-羟基-Delta(5)-或 Delta(4)-3-酮基官能团的 26-胆甾烷酸和 26-醇的差向异构形式的新合成)-3β-乙酰氧基-pregn-5-en-20-羧酸。所得化合物可用作研究胆酸的标准品。侧链的构建是通过将甾体 23-碘化物连接到由 (2R)- 和 (2S)-3-羟基-2-甲基丙酸酯制备的砜来实现的。使用由 TEMPO 和漂白剂催化的亚氯酸钠，将中间体 26-醇氧化成相应的羧酸，确保保留 C-25 的立体化学和环状部分的官能团。