2,5-庚二醇 | 70444-25-6

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 脂肪酰基
• 中文名称: 2,5-庚二醇
• 英文名称: heptane-2,5-diol
• 英文别名: 2,5-heptanediol；α-Methyl-α'-aethyl-tetramethylenglykol；Heptan-2,5-diol
• CAS: 70444-25-6
• 化学式: C₇H₁₆O₂
• 分子量: 132.203
• InChiKey: XTVHTJKQKUOEQA-UHFFFAOYSA-N

物化性质

• 沸点：
  132℃ (18.4 Torr)
• 密度：
  0.945±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.9
• 重原子数：
  9
• 可旋转键数：
  4
• 环数：
  0.0
• sp3杂化的碳原子比例：
  1.0
• 拓扑面积：
  40.5
• 氢给体数：
  2
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2,5-庚二醇 在 硫酸 作用下， 生成 2-ethyl-5-methyl-tetrahydro-furan
  参考文献：
  名称：

  Wohlgemuth, Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1914, vol. 159, p. 80

  摘要：

  DOI：
• 作为产物：
  描述：

  2-acetoxy-heptane-5-ol 在 sodium hydroxide 作用下， 以 甲醇 、 水 为溶剂， 反应 0.5h， 以96%的产率得到2,5-庚二醇
  参考文献：
  名称：

  1,4-二醇的动态动力学不对称转化和反式2,5-二取代吡咯烷的制备

  摘要：

  用南极假丝酵母脂肪酶B（CALB），洋葱假单胞菌脂肪酶II（PS-C II）和钌催化剂进行一系列1,4-二醇的动态动力学不对称转化（DYKAT）。β-氯取代的1,4-二醇成功转化为光学纯的1,4-二乙酸酯，这是一种非常有用的合成中间体。光学纯的1，4-二乙酸酯的有用性通过对映体纯的2，5-二取代的吡咯烷的合成证明。

  DOI：

  10.1016/j.tetlet.2009.02.079

文献信息

• Stereochemical Control in Microbial Reduction. 12. (<i>S</i>)-4-Nitro-2-butanol as a Source to Synthesize Natural Products
  作者：Kaoru Nakamura、Takashi Kitayama、Yoshihiko Inoue、Atsuyoshi Ohno

  DOI：10.1246/bcsj.63.91

  日期：1990.1

  (S)-(+)-4-Nitro-2-butanol (1) obtained by the stereoselective reduction of 4-nitro-2-butanone by bakers’ yeast was employed for the syntheses of natural products. A precursor of (+)-brefeldin A is synthesized starting from this chiral building block by 10 steps short-cut procedure compared with the shortest method so far reported. (S)-(+)-Sulcatol is obtained in much better enantiomeric purity than those reported. The reactivity of 1 in base-catalyzed condensations with Michael acceptors or aldehydes is largely affected by a base employed as the catalyst.

  通过用面包酵母进行立体选择性还原4-硝基-2-丁酮，获得的(S)-(+)-4-硝基-2-丁醇（1）被用于天然产物的合成。以该手性构建块为起始材料，通过10步的简化工艺合成了(+)-布雷菲尔丁A的前体，相较于目前已报道的最短方法，这一工艺大大缩短了步骤。所获得的(S)-(+)-苏卡醇的对映体纯度明显高于已报道的结果。1在与迈克尔受体或醛进行碱催化缩合反应时，其反应性受到所用催化剂的碱的影响。
• Concentrated, stable, translucent or clear, fabric softening compositions including chelants
  申请人：Wahl Hoffman Errol

  公开号：US20050202998A1

  公开（公告）日：2005-09-15

  Clear or translucent fabric softening compositions having a biodegradable fabric softening active and an added chelating agent are disclosed. The biodegradable fabric softening active preferably has the formula: wherein each R substituent is hydrogen or a short chain C 1 -C 6 , preferably C 1 -C 3 alkyl or hydroxyalkyl group, e.g., methyl (most preferred), ethyl, propyl, hydroxyethyl, and the like, benzyl, or mixtures thereof; each m is 2 or 3; each n is from 1 to about 4, preferably 2; each Y is —O—(O)C—, —(R)N—(O)C—, —C(O)—N(R)—, or —C(O)—O—, preferably —O—(O)C—; the sum of carbons in each R 1 , plus one when Y is —O—(O)C— or —(R)N—(O)—, is C 6 -C 22 , preferably C 12-22 , more preferably C 14 -C 20 , but no more than one R 1 or YR 1 sum being less than about 12 and then the other R 1 or YR 1 sum is at least about 16, with each R 1 being a long chain C 5 -C 21 (or C 6 -C 22 ), preferably C 9 -C 19 (or C 9 -C 20 ), most preferably C 11 -C 17 (or C 12 -C 18 ), straight, branched, unsaturated or polyunsatruated alkyl, the average Iodine Value of the parent fatty acid of the R 1 being from about 20 to about 140. The chelating agent is preferably diaminetriaminepentaacetic acid. The compositions display excellant clarity with a percentage haze in the transmission mode of a Hunter Color analysis of less than 90%, preferably less than 50%.

  本文揭示了具有可生物降解织物柔软活性剂和添加螯合剂的透明或半透明织物柔软组合物。可生物降解织物柔软活性剂优选具有以下公式： 其中，每个R取代基是氢或短链C1-C6，优选是C1-C3烷基或羟基烷基，例如，甲基（最优选），乙基，丙基，羟乙基等，苯甲基或其混合物；每个m为2或3；每个n为1至约4，优选为2；每个Y为—O—（O）C—，—（R）N—（O）C—，—C（O）—N（R）—或—C（O）—O—，优选为—O—（O）C—；当Y为—O—（O）C—或—（R）N—（O）—时，每个R1中碳的总数加一为C6-C22，优选为C12-22，更优选为C14-C20，但不超过一个R1或YR1总和小于约12，然后另一个R1或YR1总和至少约为16，每个R1为长链C5-C21（或C6-C22），优选为C9-C19（或C9-C20），最优选为C11-C17（或C12-C18），直链、支链、不饱和或多不饱和烷基，R1的父脂肪酸的平均碘值约为20至约140。螯合剂优选为二氨基三乙酸五钠盐。该组合物在Hunter Color分析的透射模式下具有出色的清晰度，其百分之雾度小于90％，优选小于50％。
• Concentrated, stable, preferably clear, fabric softening composition
  申请人：Trinh Toan

  公开号：US20060058216A1

  公开（公告）日：2006-03-16

  Principal solvents, especially mono-ol and diol principal solvents, having a ClogP of from about 0.15 to about 0.64, preferably from about 0.25 to about 0.62, and more preferably from about 0.40 to about 0.60, are disclosed that have the ability to make clear aqueous fabric softener compositions containing relatively high concentrations of fabric softener actives having ester linkages in their long, hydrophobic chains. The fabric softener actives are either unsaturated, or have intermediate length chains (˜C 12-14 ) and the said principal solvents are used at levels of less than about 40%. Other solvents may be present. Some of the said principal solvents are novel compounds and/or novel mixtures. Premixes of the fabric softening actives, the principal solvents, and, optionally, other solvents are useful in the preparation of complete formulations by obviating/limiting the need for heating.

  本发明揭示了主要溶剂，特别是具有ClogP约为0.15至约0.64，优选为约0.25至约0.62，更优选为约0.40至约0.60的单醇和双醇主要溶剂，具有制备含有长链疏水基中酯键的相对高浓度织物柔顺剂活性成分的清澈水性织物柔顺剂组合物的能力。织物柔顺剂活性成分可以是不饱和的，也可以具有中等长度的链（约C12-14），所述主要溶剂的使用水平小于约40％。其他溶剂可以存在。其中一些主要溶剂是新化合物和/或新混合物。织物柔顺剂活性成分、主要溶剂和可选的其他溶剂的预混物在制备完整配方时是有用的，因为它们可以避免/限制加热的需要。
• Concentrated, stable fabric softening composition
  申请人：——

  公开号：US20030153483A1

  公开（公告）日：2003-08-14

  Principal solvents, especially mono-ol and diol principal solvents, having a ClogP of from about 0.15 to about 0.64, preferably from about 0.25 to about 0.62, and more preferably from about 0.40 to about 0.60, are disclosed that have the ability to make clear aqueous fabric softener compositions containing relatively high concentrations of fabric softener actives having ester linkages in their long, hydrophobic chains. The fabric softener actives are either unsaturated, or have intermediate length chains (˜C 12-14 ) and the said principal solvents are used at levels of less than about 40%. Other solvents may be present. Some of the said principal solvents are novel compounds and/or novel mixtures. Premixes of the fabric softening actives, the principal solvents, and, optionally, other solvents are useful in the preparation of complete formulations by obviating/limiting the need for heating.

  本发明涉及主要溶剂，特别是具有从约0.15到约0.64的ClogP值的单醇和二醇主要溶剂，优选从约0.25到约0.62，更优选从约0.40到约0.60，具有使含有长的亲水性链中的酯键的织物柔软剂活性成分相对高浓度的清澈水性织物柔软剂组合物的能力。织物柔软剂活性成分可以是不饱和的，也可以具有中等长度的链（约C12-14），所述主要溶剂的使用水平低于约40％。其他溶剂可能也存在。其中一些主要溶剂是新化合物和/或新混合物。织物柔软剂活性成分、主要溶剂和可选的其他溶剂的预混物可用于制备完整配方，从而避免/限制加热的需要。
• LIGNIN DERIVED PHOTO-RESPONSIVE COATINGS
  申请人：EMPIRE TECHNOLOGY DEVELOPMENT LLC

  公开号：US20150307746A1

  公开（公告）日：2015-10-29

  Coating compositions that provide hydrophilic and self-cleaning properties upon exposure to an electromagnetic spectrum are disclosed. Coatings can include lignin-coumarate derivatives and/or lignin-azobenzene derivatives. When exposed to the electromagnetic spectrum, these compounds isomerize to cis-configuration which are hydrophilic in nature as compared to when these compounds are in their hydrophobic trans-state.

  本发明揭示了一种在电磁波谱曝光后具有亲水性和自洁性能的涂层组合物。涂层可以包括木质素-香豆酸衍生物和/或木质素-偶氮苯衍生物。当这些化合物暴露在电磁波谱中时，它们会异构化为顺式构型，与它们的疏水性反式状态相比，这些顺式构型具有亲水性质。