(R,S)-α,α'-dimethyl-2,6-pyridinedimethanol | 143394-12-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: (R,S)-α,α'-dimethyl-2,6-pyridinedimethanol
• 英文别名: meso-α,α'-dimethyl-2,6-pyridine methanol；(1'R,1''S)-2,6-bis(1-hydroxyethyl)pyridine；meso-2,6-bis(1-hydroxyethyl)pyridine；(1S)-1-[6-[(1R)-1-hydroxyethyl]pyridin-2-yl]ethanol
• CAS: 143394-12-1；774225-98-8
• 化学式: C₉H₁₃NO₂
• 分子量: 167.208
• InChiKey: WLWCQBOYVAIZMF-KNVOCYPGSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0
• 重原子数：
  12
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.44
• 拓扑面积：
  53.4
• 氢给体数：
  2
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  (R,S)-α,α'-dimethyl-2,6-pyridinedimethanol 在 三乙胺 、 N,N-二异丙基乙胺 作用下， 以 二氯甲烷 、 乙腈 为溶剂， 反应 36.17h， 生成 2-{(R)-1-[(S)-1-phenylethyl]aminoethyl}-6-{(S)-1-[(S)-1-phenylethyl]aminoethyl}pyridine
  参考文献：
  名称：

  带有四个手性碳中心的三胺分子的立体复杂性和立体选择性合成：2,6-双[1-（1-（1-苯基乙基氨基）乙基]吡啶的所有10种立体异构体的立体微分制备

  摘要：

  化合物（S，S）-2,6-双（1-羟乙基）吡啶，（R，R）-2,6-双（1-乙酰氧基乙基）吡啶和（1 R，1 'S）-2-（通过脂肪酶催化的对映体纯形式的2,6-双（1-羟乙基）吡啶的动力学乙酰化反应获得了1-乙酰氧基乙基）-6-（1'-羟乙基）吡啶。（R）-苯乙胺或（S）-苯乙胺通过甲磺酸盐或甲苯磺酸盐的立体定向取代同时或逐步产生1的所有立体异构体。2,6-双[1-（1-（1-苯基乙基氨基）乙基]吡啶1a的所有10种可能的立体异构体的立体定向制备− f达到。三胺1b中与氯化锌反应2，形成锌-三胺复合物16，其结构通过X射线结晶分析来确定。

  DOI：

  10.1021/jo061729e
• 作为产物：
  描述：

  1-(6-(1-羟基-乙基)-吡啶-2-基)-乙醇 在 Novozym 435 、 4 A molecular sieve 、 potassium carbonate 作用下， 以 甲醇 、 异丙醚 为溶剂， 反应 10.17h， 生成 (R,S)-α,α'-dimethyl-2,6-pyridinedimethanol
  参考文献：
  名称：

  带有四个手性碳中心的三胺分子的立体复杂性和立体选择性合成：2,6-双[1-（1-（1-苯基乙基氨基）乙基]吡啶的所有10种立体异构体的立体微分制备

  摘要：

  化合物（S，S）-2,6-双（1-羟乙基）吡啶，（R，R）-2,6-双（1-乙酰氧基乙基）吡啶和（1 R，1 'S）-2-（通过脂肪酶催化的对映体纯形式的2,6-双（1-羟乙基）吡啶的动力学乙酰化反应获得了1-乙酰氧基乙基）-6-（1'-羟乙基）吡啶。（R）-苯乙胺或（S）-苯乙胺通过甲磺酸盐或甲苯磺酸盐的立体定向取代同时或逐步产生1的所有立体异构体。2,6-双[1-（1-（1-苯基乙基氨基）乙基]吡啶1a的所有10种可能的立体异构体的立体定向制备− f达到。三胺1b中与氯化锌反应2，形成锌-三胺复合物16，其结构通过X射线结晶分析来确定。

  DOI：

  10.1021/jo061729e

文献信息

• A Straightforward Deracemization of <i>sec</i> -Alcohols Combining Organocatalytic Oxidation and Biocatalytic Reduction
  作者：Elisa Liardo、Nicolás Ríos-Lombardía、Francisco Morís、Javier González-Sabín、Francisca Rebolledo

  DOI：10.1002/ejoc.201800569

  日期：2018.6.22

  catalytic strategy: A highly efficient oxidation of a representative series of sec‐alcohols and diols with aq. NaOCl and 2‐azaadamantane N‐oxyl (AZADO) as organocatalyst was combined with a selective ketoreductase‐catalyzed bioreduction. The sequential one‐pot strategy, performed up to 100 mm of final substrate, yields benzyl, non‐benzyl, or hindered biaryl alcohols with very high yield and >99 % ee.

  混合催化策略：用仲水高效氧化一系列代表性的仲醇和二醇。NaOCl和2-氮杂金刚烷N-氧基（AZADO）作为有机催化剂与选择性酮还原酶催化的生物还原相结合。连续一锅法在最终基材上进行了长达100 m m的反应，可制得苄基，非苄基或受阻联芳基醇，收率非常高，ee大于99％。
• Stereoselective synthesis of optically active pyridyl alcohols via asymmetric transfer hydrogenation of pyridyl ketones
  作者：Kazuya Okano、Kunihiko Murata、Takao Ikariya

  DOI：10.1016/s0040-4039(00)01695-6

  日期：2000.11

  A chiral Ru(II) complex, RuCl[(S,S)-N-(p-toluenesulfonyl)-1,2-diphenyl-ethylenediamine](p-cymene), serves as an efficient catalyst for asymmetric transfer hydrogenation of 2-acetylpyridine with a substrate to catalyst molar ratio of 200–1000 with HCOOH as a hydrogen source to give (S)-1-(2-pyridyl)ethanol in an almost quantitative yield and with 95% ee.

  手性Ru（II）配合物RuCl [（S，S）-N-（对甲苯磺酰基）-1,2-二苯基-乙二胺]（对甲基苯甲基）可作为有效的催化剂，用于2-的不对称转移加氢以HCOOH为氢源的底物与催化剂的摩尔比为200-1000的乙酰基吡啶，以几乎定量的产率得到95％ee的（S）-1-（2-吡啶基）乙醇。
• Chemoenzymatic preparation of all the stereoisomers of 2-(1-hydroxyethyl)- and 2,6-bis(1-hydroxyethyl)pyridines and their acetates
  作者：Gábor Szatzker、Ildikó Móczár、Pál Kolonits、Lajos Novák、Péter Huszthy、László Poppe

  DOI：10.1016/j.tetasy.2004.07.004

  日期：2004.8

  selective acetylation of racemic 1-[6-(1-hydroxyethyl)-pyridin-2-yl]ethanone rac-2 to yield alcohol (S)-2 and acetate (R)-3. Acetylation of a diastereomeric mixture of racemic and meso-2,6-bis(1-hydroxy-ethyl)pyridine, rac/meso-4, with the most selective Novozym 435 lipase in vinyl acetate resulted in a mixture of enantiopure diol (S,S)-4, monoacetate (R,S)-5 and diacetate (R,R)-6. Hydrolysis of the

  几个脂肪酶中测试的外消旋-吡啶-2-基-6-（1-羟乙基）]乙酮对映异构选择性乙酰化1-外消旋- 2，得到醇（小号） - 2和乙酸（[R ） - 3。外消旋和内消旋-2,6-双（1-羟基-乙基）吡啶的非对映异构体混合物rac / meso - 4与乙酸乙烯酯中选择性最高的Novozym 435脂肪酶的乙酰化反应产生对映体纯二醇（S，小号） - 4，单乙酸酯（- [R ，小号） - 5和二乙酸盐（ř，R）-6。外消旋和内消旋-2,6-双（1-乙酰氧基乙基）吡啶rac / meso - 6的混合物通过相同的酶水解，得到二醇（R，R）-4，单乙酸（S，R）-的纯对映体5和二乙酸（S，S）-6。使用其他化学和酶促步骤，醇（R）-2，乙酸酯（S）-3，（S，S）-和（R，[R）-monoacetates（小号，小号） - 5和（- [R ，- [R ）- 5，内消旋- 4及其乙酸酯内消旋- 6还制备和表征。
• An efficient preparation of optically pure C2-symmetric aromatic diols by the asymmetric reduction of diacylaromatic compounds with B-chlorodiisopinocampheylborane
  作者：P.Veeraraghavan Ramachandran、Guang-Ming Chen、Zhi-Hui Lu、Herbert C. Brown

  DOI：10.1016/0040-4039(96)00708-3

  日期：1996.5

  Asymmetric reduction of diacylaromatic compounds with B-chlorodiisopinocampheylborane provides the product diols in excellent diastereomeric and enantiomeric purity.

  用B-氯二异opinocampheylborane不对称还原二酰基芳烃化合物可提供具有出色的非对映异构和对映异构纯度的产物二醇。
• Separation of remote diol and triol stereoisomers by enzyme-catalyzed esterification in organic media or hydrolysis in aqueous media
  作者：J. Shield Wallace、Bruce W. Baldwin、Cary Morrow

  DOI：10.1021/jo00045a042

  日期：1992.9

  The separation of symmetric, remote, secondary diol stereoisomers by steroselective enzyme-catalyzed acetylation with acetic anhydride in anhydrous, low polarity organic solvents or by stereoselective enzyme-catalyzed hydrolysis of the corresponding peracetate in aqueous media is described. Whether or not an alcohol is acetylated or an acetate is hydrolyzed is determined solely by its own stereochemical arrangement and not by the stereochemistry at any other stereogenic center. Since the enzyme used, Amano P lipoprotein lipase from Pseudomonas species, acetylates secondary alcohol stereogenic centers of the (R)-configuration, an (R,R)-diol is converted to its diacetate, a meso-diol is converted to the monoacetate at its (R)-stereogenic center, and an (S,S)-diol is left unchanged. Similarly, when hydrolysis is used, (R)-stereogenic centers are hydrolyzed so that the (R,R)-stereoisomer is converted to the corresponding diol while the (S,S)-stereoisomer remains a diacetate. The resulting mixture is separated, and the remaining acetates are removed by hydrolysis to give diols and triols of high stereochemical purity. Diols successively separated by esterification include alpha,alpha-dimethyl-1,4-benzenedimethanol, 1, alpha,alpha'-dimethyl-1,3-benzenedimethanol, 4, alpha,alpha'-dimethyl-2,6-pyridinedimethanol, 5, and alpha,alpha-dimethyl-4,4-biphenylenedimethanol, 6. For two cases, alpha,alpha'-dimethyl-2,6-pyridinedimethanol, 5, and alpha,alpha',alpha''-trimethyl-1,3,5-benzenetrimethanol, 7, the separation was achieved using the hydrolysis procedure. The stereochemical purity of each of the separated diol stereoisomers was determined by evaluating the NMR spectrum of its bis-MTPA ester. In most cases, it was possible to establish both the stereochemical purity of the fraction and the amount of each contaminating stereoisomer that was present. The diol products are expected to be of value for preparing optically active polymers and optically active crown ethers.