5α-cholestene-(2)-carbaldehyde-(2) | 22600-07-3

• 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-cholestene-(2)-carbaldehyde-(2)
• 英文别名: 5α-Cholesten-(2)-carbaldehyd-(2)；2-Formyl-Δ²-5α-cholesten；2-Formyl-5α-cholesten-(2)；(5S,8R,9S,10S,13R,14S,17R)-10,13-dimethyl-17-[(2R)-6-methylheptan-2-yl]-4,5,6,7,8,9,11,12,14,15,16,17-dodecahydro-1H-cyclopenta[a]phenanthrene-2-carbaldehyde
• CAS: 22600-07-3
• 化学式: C₂₈H₄₆O
• 分子量: 398.673
• InChiKey: ZMACAOBGGUYQHX-IKBPQBSDSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  9.5
• 重原子数：
  29
• 可旋转键数：
  6
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.89
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  5α-cholestene-(2)-carbaldehyde-(2) 在 sodium acetate 作用下， 生成 (8R,9S,10S,13R,14S,17R)-17-((R)-1,5-Dimethyl-hexyl)-10,13-dimethyl-4,5,6,7,8,9,10,11,12,13,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-2-carbonitrile
  参考文献：
  名称：

  ÜberSteroide和性激素。（72.米特隆）。Herstellung DESΔ 2 -2-甲酰基cholestens

  摘要：

  DOI：

  10.1002/hlca.194102401172
• 作为产物：
  描述：

  2-Methyl-cholesten-(2) 在 selenium(IV) oxide 作用下， 生成 5α-cholestene-(2)-carbaldehyde-(2)
  参考文献：
  名称：

  Dovinola,V.; Mangoni,L., Gazzetta Chimica Italiana, 1969, vol. 99, p. 206 - 218

  摘要：

  DOI：

文献信息

• The contraction of ring a in 5α-cholestane derivatives
  作者：B. Fuchs、H.J.E. Loewenthal

  DOI：10.1016/0040-4020(60)80070-1

  日期：1960.1

  The β-keto-ester which is obtained by Dieckmann cyclization of the dimethyl ester (I) of the dicarboxylic acid obtained by oxidative opening of ring A in 5α-cholestan-3-one and related compounds has been shown to have the structure IIa, by its degradation, via the unsaturated acid (Va), to A-nor-5β-cholestan-3-one (VI) and to the dimethyl ester (VIIb). The stereochemistry of compound IIa and of related

  通过对5α-胆甾烷-3-酮中的环A氧化开环而获得的二元羧酸的二甲酯（I）进行Dieckmann环化反应获得的β-酮酯已显示具有结构IIa，通过不饱和酸（Va）降解为A-nor-5β-胆甾烷-3-酮（VI）和二甲酯（VIIb）。讨论了化合物IIa和相关的A-取代的A-nor-5α-胆甾烷的立体化学。从5α-胆甾-1-烯-3-酮（XIV）开始，合成了α-nor-5α-胆甾醇-1-酮（XVIIb）。
• Characterization of Indoor Particle Sources Using Continuous Mass and Size Monitors
  作者：Christopher M. Long、Helen H. Suh、Petros Koutrakis

  DOI：10.1080/10473289.2000.10464154

  日期：2000.7

  A comprehensive indoor particle characterization study was conducted in nine Boston-area homes in 1998 in order to characterize sources of PM in indoor environments. State-of-the-art sampling methodologies were used to obtain continuous PM2.5 concentration and size distribution particulate data for both indoor and outdoor air. Study homes, five of which were sampled during two seasons, were monitored over week-long periods. Among other data collected during the extensive monitoring efforts were 24-hr elemental/organic carbon (EC/OC) particulate data as well as semi-continuous air exchange rates and time-activity information.This rich data set shows that indoor particle events tend to be brief, intermittent, and highly variable, thus requiring the use of continuous instrumentation for their characterization. In addition to dramatically increasing indoor PM2.5 concentrations, these data demonstrate that indoor particle events can significantly alter the size distribution and composition of indoor particles. Source event data demonstrate that the impacts of indoor activities are especially pronounced in the ultrafine (d(a) less than or equal to 0.1 mu m) and coarse (2.5 less than or equal to d(a) less than or equal to 10 mu m) modes. Among the sources of ultrafine particles characterized in this study are indoor ozone/terpene reactions. furthermore, EC/OC data suggest that organic carbon is a major constituent of particles emitted during indoor source events. Whether exposures to indoor-generated particles, particularly from large short-term peak events, may be associated with adverse health effects will become clearer when biological mechanisms are better known.