(R,R)-α,α'-dimethyl-1,4-benzenedimethanol diacetate | 143329-80-0

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: (R,R)-α,α'-dimethyl-1,4-benzenedimethanol diacetate
• 英文别名: [(1R)-1-[4-[(1R)-1-acetyloxyethyl]phenyl]ethyl] acetate
• CAS: 143329-80-0
• 化学式: C₁₄H₁₈O₄
• 分子量: 250.295
• InChiKey: SGFNIOBEKMZQEU-NXEZZACHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  18
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  (R,R)-α,α'-dimethyl-1,4-benzenedimethanol diacetate 在 sodium hydroxide 作用下， 以 甲醇 为溶剂， 以92%的产率得到(R,R)-α,α'-dimethyl-1,4-benzenedimethanol
  参考文献：
  名称：

  Separation of remote diol and triol stereoisomers by enzyme-catalyzed esterification in organic media or hydrolysis in aqueous media

  摘要：

  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.

  DOI：

  10.1021/jo00045a042
• 作为产物：
  描述：

  1,4-二乙酰苯 在 sodium tetrahydroborate 作用下， 以 异丙醇 、 苯 为溶剂， 反应 9.0h， 生成 (R,R)-α,α'-dimethyl-1,4-benzenedimethanol diacetate
  参考文献：
  名称：

  Separation of remote diol and triol stereoisomers by enzyme-catalyzed esterification in organic media or hydrolysis in aqueous media

  摘要：

  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.

  DOI：

  10.1021/jo00045a042

文献信息

• Combined Ruthenium(II) and Lipase Catalysis for Efficient Dynamic Kinetic Resolution of Secondary Alcohols. Insight into the Racemization Mechanism
  作者：Belén Martín-Matute、Michaela Edin、Krisztián Bogár、F. Betül Kaynak、Jan-E. Bäckvall

  DOI：10.1021/ja051576x

  日期：2005.6.1

  Pentaphenylcyclopentadienyl ruthenium complexes (3) are excellent catalysts for the racemization of secondary alcohols at ambient temperature. The combination of this process with enzymatic resolution of the alcohols results in a highly efficient synthesis of enantiomerically pure acetates at room temperature with short reaction times for most substrates. This new reaction was applied to a wide range

  五苯基环戊二烯基钌配合物 (3) 是室温下仲醇外消旋化的极好催化剂。该过程与醇的酶促拆分相结合，可以在室温下高效合成对映异构纯的乙酸酯，大多数底​​物的反应时间都很短。这种新反应适用于包括杂芳族醇在内的多种官能化醇，对于后者中的许多醇，首次通过动态动力学拆分 (DKR) 有效制备了对映纯乙酸酯。制备并研究了不同取代的环戊二烯基钌配合物作为醇外消旋化的催化剂。发现五芳基取代的环戊二烯基配合物是外消旋化的高效催化剂。用烷基取代芳基之一大大减慢了外消旋化过程。氢化钌 eta(5)-Ph(5)CpRu(CO)(2)H (8) 催化 (S)-1-苯基乙醇外消旋化的研究表明外消旋化发生在钌的配位范围内催化剂。在对甲苯基甲基酮（1 当量）存在下进行的 (S)-1-苯基乙醇外消旋化中缺乏酮交换支持这一结论，这产生 <1% 的 1-(对甲苯基)乙醇. 氯化钌和碘化物配合物 3a 和 3c 以及氢化钌配合物 8
• Asymmetric Chemoenzymatic Reductive Acylation of Ketones by a Combined Iron-Catalyzed Hydrogenation-Racemization and Enzymatic Resolution Cascade
  作者：Osama El-Sepelgy、Aleksandra Brzozowska、Magnus Rueping

  DOI：10.1002/cssc.201700169

  日期：2017.4.22

  A general and practical process for the conversion of prochiral ketones into the corresponding chiral acetates has been realized. An iron carbonyl complex is reported to catalyze the hydrogenation–dehydrogenation–hydrogenation of prochiral ketones. By merging the iron‐catalyzed redox reactions with enantioselective enzymatic acylations a wide range of benzylic, aliphatic and (hetero)aromatic ketones

  已经实现了将前手性酮转化为相应的手性乙酸酯的通用且实用的方法。据报道，羰基铁络合物催化前手性酮的加氢-脱氢-氢化。通过将铁催化的氧化还原反应与对映选择性酶促酰化反应合并，可将各种苄基，脂肪族和（杂）芳族酮以及二酮还原性酰化。分离出高产率和对映选择性的相应产物。铁催化剂与分子氢一起用作氢供体，以及容易获得的乙酸乙酯作为酰基供体一起使用，使得这种级联方法在经济价值和环境信誉方面都非常令人感兴趣。
• Aminocyclopentadienyl Ruthenium Complexes as Racemization Catalysts for Dynamic Kinetic Resolution of Secondary Alcohols at Ambient Temperature
  作者：Jun Ho Choi、Yoon Kyung Choi、Yu Hwan Kim、Eun Sil Park、Eun Jung Kim、Mahn-Joo Kim、Jaiwook Park

  DOI：10.1021/jo0355799

  日期：2004.3.1

  tests in the racemization of (S)-4-phenyl-2-butanol showed that 7 is the most active catalyst, although the difference decreased in the DKR. Complex 4 was used in the DKR of various alcohols; at room temperature, not only simple alcohols but also functionalized ones such as allylic alcohols, alkynyl alcohols, diols, hydroxyl esters, and chlorohydrins were successfully transformed to chiral acetates. In

  Aminocyclopentadienyl钌复合物，其可以用作常温消旋催化剂与在动态动力学拆分仲醇的（DKR），脂肪酶是从环戊-2,4- dienimines合成的Ru 3（CO）12，和CHCl 3： [2,3,4,5-PH 4（η 5 -C 4 CNHR）]的Ru（CO）2 Cl（上4：R =我-Pr; 5：R = ñ -Pr; 6：R =吨-Bu ），[2,5-ME 2 -3,4--PH 2（η 5 -C 4 CNHR）]的Ru（CO）2 Cl（上7：R = i -Pr; 8：R = PH），和[2,3,4,5-PH 4（η 5 -C 4 CNHAr）]的Ru（CO）2 Cl（上9：Ar为p -NO 2 ç 6 ħ 4 ; 10： Ar ＝p- ClC 6 H 4；11：Ar ＝ Ph；12：Ar ＝p- OMeC 6 H 4；13：Ar ＝p- NMe 2 C 6 H 4）。外消旋
• Dynamic Kinetic Resolution of Secondary Diols via Coupled Ruthenium and Enzyme Catalysis
  作者：B. Anders Persson、Fernando F. Huerta、Jan-E. Bäckvall

  DOI：10.1021/jo990447u

  日期：1999.7.1

  Enzymatic acylation of secondary symmetrical diols (as meso/dl mixtures) in combination with ruthenium-catalyzed isomerization of the diol led to efficient dynamic kinetic resolution. In this way, a meso/dl mixture of the diol was transformed to enantiomerically pure (R,R)-diacetate, making efficient use of all the diol material. For some of the flexible substrates, substantial amounts of meso-diacetates

  二级对称二醇的酶促酰化（作为 meso/dl 混合物）与钌催化的二醇异构化相结合，导致有效的动态动力学拆分。通过这种方式，二醇的内消旋/dl 混合物转化为对映异构纯的 (R,R)-二乙酸酯，从而有效利用所有二醇材料。对于一些柔性基材，大量的内消旋二乙酸盐作为副产物形成。结果表明，内消旋产物的主要部分是通过分子内酰基转移途径形成的。
• Highly Compatible Metal and Enzyme Catalysts for Efficient Dynamic Kinetic Resolution of Alcohols at Ambient Temperature
  作者：Belén Martín-Matute、Michaela Edin、Krisztián Bogár、Jan-E. Bäckvall

  DOI：10.1002/anie.200461416

  日期：2004.12.3