5-孕烯-3-beta,16-alpha-二醇-20-酮 | 520-88-7

• 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
• 中文名称: 5-孕烯-3-beta,16-alpha-二醇-20-酮
• 英文名称: 16α-hydroxypregnenolone
• 英文别名: 16alpha-Hydroxypregnenolone；1-[(3S,8S,9S,10R,13S,14S,16R,17R)-3,16-dihydroxy-10,13-dimethyl-2,3,4,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthren-17-yl]ethanone
• CAS: 520-88-7
• 化学式: C₂₁H₃₂O₃
• 分子量: 332.483
• InChiKey: ZAKJZPQDUPCXSD-YRWKUUEZSA-N

物化性质

• 物理描述：
  Solid

计算性质

• 辛醇/水分配系数(LogP)：
  3.6
• 重原子数：
  24
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.86
• 拓扑面积：
  57.5
• 氢给体数：
  2
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  5-孕烯-3-beta,16-alpha-二醇-20-酮 在 palladium on activated charcoal 氢气 作用下， 以 溶剂黄146 为溶剂， 生成 3β,16α-dihydroxy-5α-pregnan-20-one
  参考文献：
  名称：

  Synthesis of Polyhydroxy-steroids. II. Syntheses of Isomeric 5α-Pregnane-3, 5, 6, 16, 20-pentols and Related Compounds.

  摘要：

  考虑到5α-孕烯-3β, 5, 6β, 16β, 20α-五醇（POL）在动物实验中表现出与SEF相似的有趣的排钠活性，合成了一些在C-3、C-5、C-6、C-16和C-20位上具有羟基或羰基的多氧化孕烷化合物。同时还描述了3β, 5, 6β, 16α-四羟基-5α-孕烯-20-酮的合成，这是一种POL和SEF的杂合化合物。

  DOI：

  10.1248/cpb.11.95
• 作为产物：
  描述：

  16α,17α-epoxy-3β-formyloxypregn-5-en-20-one 生成 5-孕烯-3-beta,16-alpha-二醇-20-酮
  参考文献：
  名称：

  Synthesis of Polyhydroxy-steroids. II. Syntheses of Isomeric 5α-Pregnane-3, 5, 6, 16, 20-pentols and Related Compounds.

  摘要：

  考虑到5α-孕烯-3β, 5, 6β, 16β, 20α-五醇（POL）在动物实验中表现出与SEF相似的有趣的排钠活性，合成了一些在C-3、C-5、C-6、C-16和C-20位上具有羟基或羰基的多氧化孕烷化合物。同时还描述了3β, 5, 6β, 16α-四羟基-5α-孕烯-20-酮的合成，这是一种POL和SEF的杂合化合物。

  DOI：

  10.1248/cpb.11.95

文献信息

• Sonochemical reduction of α, β-epoxy ketones and α′-oxygenated analogs by aluminium amalgam
  作者：M.J.S. Miranda Moreno、M.L. Sa´ e Melo、A.S. Campos Neves

  DOI：10.1016/s0040-4039(00)60586-5

  日期：1993.1

  The sonochemical reductive opening of α, β-epoxy ketones and their α′-oxygenated (-OH or -OAc) analogs by aluminium amalgam allows shorter reaction times, better yields of the respective β-hydroxy ketones and minimization of by-products. The rates of these reactions are affected by the intensity of the acoustic waves and by temperature.

  铝汞合金对α，β-环氧酮及其α'-加氧的（-OH或-OAc）类似物进行声化学还原打开可缩短反应时间，更好地提高各个β-羟基酮的收率，并将副产物减至最少。这些反应的速率受声波强度和温度的影响。
• CYP154C5 Regioselectivity in Steroid Hydroxylation Explored by Substrate Modifications and Protein Engineering**
  作者：Paula Bracco、Hein J. Wijma、Bastian Nicolai、Jhon Alexander Rodriguez Buitrago、Thomas Klünemann、Agustina Vila、Patrick Schrepfer、Wulf Blankenfeldt、Dick B. Janssen、Anett Schallmey

  DOI：10.1002/cbic.202000735

  日期：2021.3.16

  selectivity: Using substrate and protein engineering based on key residues and functional groups, the regioselectivity of the bacterial cytochrome P450 monooxygenase CYP154C5 in the hydroxylation of different steroids was altered. Apart from 16α‐hydroxylation, steroid products containing hydroxy groups in 15α and 21 position were formed.

  选择性的变化：使用基于关键残基和官能团的底物和蛋白质工程，改变了细菌细胞色素 P450 单加氧酶 CYP154C5 在不同类固醇羟基化中的区域选择性。除了 16α-羟基化外，还形成了 15α 和 21 位含有羟基的类固醇产物。
• Steroids excreted in urine by neonates with 21-hydroxylase deficiency: Characterization, using GC–MS and GC–MS/MS, of the D-ring and side chain structure of pregnanes and pregnenes
  作者：Sofia Christakoudi、David A. Cowan、Norman F. Taylor

  DOI：10.1016/j.steroids.2009.09.011

  日期：2010.1

  conditions, were used together to determine the structure of the D-ring and the side chain of 20-oxo and 20-hydroxy pregnane(ene)s without oxo groups on the A-, B-, and C-ring. All possible combinations of D-ring and side chain configuration were considered. Most fragmentations could be interpreted as partial or complete D-ring cleavages with loss of the side chain, aided by comparison with spectra of deuterated

  缺乏21-羟化酶的新生儿尿液中的类固醇代谢物主要是多羟基化的17-羟孕酮和雄激素代谢物，大多数结构不完全明确。这项研究是表征和鉴定这些特征的综合项目的一部分，以增强诊断并进一步阐明新生儿类固醇代谢的类型。在萃取和酶促共轭水解后，类固醇以甲基肟-三甲基甲硅烷基醚衍生物的形式在与四极杆和离子阱质谱仪联用的气相色谱仪上进行分析。在恒定激发条件下获得的GC-MS和GC-MS / MS光谱一起用于确定D-环和20-羟基和20-羟基孕烯（烯）的侧链的结构，这些烯基上没有氧基。 A环，B环和C环。考虑了D形环和侧链构型的所有可能组合。通过与氘代衍生物和硼氢化物还原的代谢物的光谱比较，可以将大多数片段解释为部分或完全的D环裂解，并丢失了侧链。还讨论了可能的重排离子。鉴定了140多种内源性代谢物。GC-MS / MS对于表征具有16,17-二羟基-20-氧代结构的化合物特别有用，该结构被解释为子宫内酶诱导的
• Hydrazine hydrate induced reductive cleavage of α,β-epoxy ketones: an efficient procedure for the preparation of β-hydroxy ketones
  作者：Jorge A.R. Salvador、Alcino J.L. Leitão、M. Luísa Sá e Melo、James R. Hanson

  DOI：10.1016/j.tetlet.2004.12.103

  日期：2005.2

  An efficient and general procedure for the reductive cleavage of α,β-epoxy ketones to the corresponding β-hydroxy ketones, using hydrazine hydrate in ethanol at low temperatures, is described.

  描述了一种在低温下使用水合肼在乙醇中将α，β-环氧酮还原裂解为相应的β-羟基酮的有效且通用的方法。
• Method of forming subtraction images
  申请人：Arakawa Satoshi

  公开号：US20050195943A1

  公开（公告）日：2005-09-08

  A radiation image signal is acquired from a radiation image of an object before being injected with a contrast medium, and a radiation image signal is acquired from a radiation image of the same object after being injected with the contrast medium. A subtraction process for subtracting image signal components of a plurality of the thus acquired radiation image signals, which image signal components represent corresponding pixels in the radiation images represented by the plurality of the radiation image signals, from one another is performed. A contrasted radiation image, in which a pattern of a specific structure of the object having been contrasted with the contrast medium in the radiation image has been extracted or enhanced, is thus formed. The contrast medium is a liposome, which contains a hydrophobic iodine compound as a film forming constituent.

  在注入造影剂之前，从物体的辐射图像中获取辐射图像信号，在注入造影剂之后，从同一物体的辐射图像中获取辐射图像信号。执行一个减法过程，将由此获取的多个辐射图像信号的图像信号分量相互减去，这些图像信号分量代表多个辐射图像信号所代表的辐射图像中的相应像素。这样就形成了对比辐射图像，其中提取或增强了辐射图像中被对比介质对比的物体的特定结构的图案。对比介质是一种脂质体，它含有一种疏水性碘化合物作为成膜成分。