(3R*,5R*)-4-methylheptane-3,5-diol | 97674-70-9

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (3R*,5R*)-4-methylheptane-3,5-diol
• 英文别名: (3RS,5RS)-4-Methylheptane-3,5-diol；syn,anti-4-Methylheptan-3,5-diol；4-methylheptan-3,5-diol；(3R,5R)-4-methylheptane-3,5-diol
• CAS: 97674-70-9；136233-39-1；136233-40-4
• 化学式: C₈H₁₈O₂
• 分子量: 146.23
• InChiKey: GUNIIZNPUZBGEZ-HTQZYQBOSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  10
• 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：

  (3R*,5R*)-4-methylheptane-3,5-diol 、 2,2-二甲氧基丙烷 在 对甲苯磺酸 作用下， 以 2,2-二甲氧基丙烷 为溶剂， 生成 4,6-diethyl-2,2,5-trimethyl-[1.3]dioxane
  参考文献：
  名称：

  Toward Asymmetric Aldol-Tishchenko Reactions with Enolizable Aldehydes: Access to Defined Configured Stereotriads, Tetrads, and Stereopentads

  摘要：

  Asymmetric aldol-Tishchenko, reactions of enolizable aldehydes and ketones in the presence of chiral BINOLTi(OtBU)(2)/Cinchona alkaloids complexes are described. Different configurative outcomes of these reactions depend on an equilibration through a retro aldol/aldol sequence and can be influenced by the configurative architecture of substrates. The results are explained by means of transition state models and rate constants. These considerations offer a fine-tuning of diastereoselectivity in aldol-Tishchenko reactions. Extensions of this research give access to defined configured stereotriads, stereotetrads, and stereopentads.

  DOI：

  10.1021/jo9003635
• 作为产物：
  描述：

  3-trimethylsiloxypenta-1,3-diene 在 sodium hydroxide 、 二异丙氧基二氯化钛 、 bis(cyclopentadienyl)titanium (III) chloride 、 异丙基氯化镁 作用下， 以 四氢呋喃 、 甲醇 、 二氯甲烷 为溶剂， 反应 3.5h， 生成 (3R*,5R*)-4-methylheptane-3,5-diol
  参考文献：
  名称：

  A Combination of Allyltitanation and Tandem Aldol-Tischtschenko Reactions Using Tetraisopropoxytitanium

  摘要：

  在四异丙氧基钛的催化下，烯丙基钛化反应与串联醛醇-Tischtschenko 反应可通过两个步骤获得立体可控的聚丙酸酯体系。

  DOI：

  10.1055/s-2000-6247

文献信息

• Samarium Ion-Promoted Cross-Aldol Reactions and Tandem Aldol/Evans−Tishchenko Reactions
  作者：Ling Lu、Hung-Yu Chang、Jim-Min Fang

  DOI：10.1021/jo981675b

  日期：1999.2.1

  effective Lewis acids to catalyze tandem aldol/Evans-Tishchenko reactions. The aldol/Evans-Tishchenko reactions of methyl ketones with aldehydes occurred at 0 degrees C to give alpha,gamma-anti diol monoesters 53a-59a. When the reactions were conducted at room temperature, a certain degree of transesterification took place. The aldol/Evans-Tishchenko reactions of ethyl or benzyl ketones with aldehydes

  通过在环境温度下SmI（2）或SmI（3）以及分子筛的催化，可以实现羰基化合物的跨醇醛反应。在与供体底物如丙酮，环戊酮和环己酮的交叉醇醛缩合反应中，可以将1，3-二氯丙酮和1-氯丙酮用作受体底物。与（R）-甘油醛丙酮化物的交叉醛醇缩合反应产生光学纯的化合物25-32，其立体化学与偶极模式的椅子状螯合物过渡态一致。SmI（2）分子筛或SmI（3）分子筛也可作为有效的路易斯酸来催化串联羟醛/埃文斯-季申科反应。甲基酮与醛的aldol / Evans-Tishchenko反应在0℃下发生，得到α，γ-抗二醇单酯53a-59a。当反应在室温下进行时，发生了一定程度的酯交换反应。乙基或苄基酮与醛的aldol / Evans-Tishchenko反应生成α，β-抗-α，γ-抗二醇单酯60a-65a。然而，环状酮与苯甲醛的醛醇/埃文斯-季申科反应以不同的立体选择性发生，得到α，β-syn-α，γ-抗二醇
• Probe compound for detecting and isolating enzymes and means and methods using the same
  申请人：Helmholtz-Zentrum für Infektionsforschung GmbH

  公开号：EP2230312A1

  公开（公告）日：2010-09-22

  The present invention relates to a probe compound that can comprise any substrate or metabolite of an enzymatic reaction in addition to an indicator component, such as, for example, a fluorescence dye, or the like. Moreover, the present invention relates to means for detecting enzymes in form of an array, which comprises any number of probe compounds of the invention which each comprise a different metabolite of interconnected metabolites representing the central pathways in all forms of life. Moreover, the present invention relates to a method for detecting enzymes involving the application of cell extracts or the like to the array of the invention which leads to reproducible enzymatic reactions with the substrates. These specific enzymatic reactions trigger the indicator (e.g. a fluorescence signal) and bind the enzymes to the respective cognate substrates. Moreover, the invention relates to means for isolating enzymes in form of nanoparticles coated with the probe compound of the invention. The immobilisation of the cognate substrates or metabolites on the surface of nanoparticles by means of the probe compounds allows capturing and isolating the respective enzyme, e.g. for subsequent sequencing.

  本发明涉及一种探针化合物，它可以包括酶反应的任何底物或代谢物，此外还包括指示成分，例如荧光染料或类似物。此外，本发明还涉及以阵列形式检测酶的方法，该阵列由任意数量的本发明探针化合物组成，每种探针化合物由代表所有生命形式中中心途径的相互关联的代谢物中的不同代谢物组成。此外，本发明还涉及一种检测酶的方法，该方法涉及将细胞提取物或类似物应用于本发明的阵列，从而导致与底物发生可重复的酶反应。这些特定的酶反应会触发指示剂（如荧光信号），并将酶与各自的同源底物结合。此外，本发明还涉及以涂覆有本发明探针化合物的纳米颗粒形式分离酶的方法。通过探针化合物将同源底物或代谢物固定在纳米颗粒表面，可以捕获和分离相应的酶，例如用于后续测序。
• 1,3-versus 1,2-Asymmetric induction in the reduction of β-hydroxy ketones by intramolecular hydrosilylation
  作者：Saeed Anwar、Gavin Bradley、Anthony P. Davis

  DOI：10.1039/p19910001383

  日期：——

  The role of 1,2-asymmetric induction has been investigated in the 1,3-anti-selective reduction of beta-hydroxy ketones via intramolecular hydrosilylation. For the alpha-methyl beta-hydroxy ketones 2a, 3a, the effect of the alpha-substituent is negligible except that it appears to reinforce 1,3-asymmetric induction. For the alpha-ethyl beta-hydroxy ketones 2b, 3b, 1,3-asymmetric induction is dominant but not overwhelming. The super-acid TfOH2+ B(OTf)4- has been used as a catalyst for the hydrosilylation giving, in one case, an improved result when compared with previous methodology.
• The Role of theα-Stereogenic Center in the Control of Stereoselection in the Reduction ofα-Alkyl-β-hydroxy Ketones: A Highly Diastereoselective Protocol for the Synthesis of 1,2-syn-2-Alkyl-1,3-diols
  作者：Giuseppe Bartoli、Maria C. Bellucci、Marcella Bosco、Renato Dalpozzo、Enrico Marcantoni、Letizia Sambri

  DOI：10.1002/1521-3765(20000717)6:14<2590::aid-chem2590>3.0.co;2-x

  日期：2000.7.17

  Accurate investigations on the role played by an alpha-stereogenic center in controlling the reduction of various classes of beta-hydroxy ketones allowed us to set up a general and highly diastereoselective protocol for the synthesis of 2-alkyl-1,3-diols with 1,2-syn relationship. This methodology is based on the conversion of a beta-hydroxy ketone into the corresponding titanium alcoholate that permits us to organize the substrate in a stable and rigid structure, which stereofacially favors attacking hydride ions. The use of THF as solvent makes available a variety of hydride donors that cover a large spectrum of steric demand: the choice of the more appropriate one depends on the conformational stability of the cyclic intermediate. Excellent results are obtained also in the presence of an additional stereogenic center in the beta-position, even if it exerts a concordant or an opposite steric effect with respect to the alpha-substituent.
• Highly diastereoselective synthesis of 2-substituted-1,3-diols catalyzed by ketoreductases
  作者：Dimitris Kalaitzakis、Ioulia Smonou

  DOI：10.1016/j.tet.2010.09.096

  日期：2010.11

  The stereoselective reduction of alpha-substituted-beta-hydroxy ketones for the preparation of the corresponding optically pure 2-monosubstituted or 2-disubstituted-1,3-diols is described. These transformations proceed in high optical purities and yields. Ketoreductases were able to catalyze the formation of either the syn or the anti diol, depending on the enzyme. By replacing the a-alkyl substituent for an OAc moiety, in low conversion time (<= 24 h), ketoreductases catalyzed the formation of the OAc-protected 1,2,3-triol, in high yield and with high optical purity (>99% de, >99% ee). This is a simple and highly stereoselective method for the synthesis of different diastereomers of chiral diols. (C) 2010 Elsevier Ltd. All rights reserved.