(R)-1-(2-甲基苯基)乙酸乙酯 | 205237-75-8

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 中文名称: (R)-1-(2-甲基苯基)乙酸乙酯
• 英文名称: (R)-1-(2-methylphenyl)-ethyl acetate
• 英文别名: [(1R)-1-(2-methylphenyl)ethyl] acetate
• CAS: 205237-75-8
• 化学式: C₁₁H₁₄O₂
• 分子量: 178.231
• InChiKey: NOQHVSZXSJFXQW-SECBINFHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  13
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (R)-1-(2-甲基苯基)乙酸乙酯 在 sodium hydroxide 作用下， 以 甲醇 为溶剂， 反应 0.08h， 生成 (R)-1-(2-甲基苯基)乙醇
  参考文献：
  名称：

  Rapid, room-temperature acylative kinetic resolution of sec-alcohols using atropisomeric 4-aminopyridine/triphenylphosphine catalysis

  摘要：

  Two new atropisomeric 4-aminopyridine-based nucleophilic catalysts containing terphenyl 'blocking groups' have been prepared and evaluated for kinetic resolution (KR) of aryl alkyl sec-alcohols. One of these biaryls is shown to be the most selective atropisomeric catalyst yet prepared for several sec-alcohols but its low reactivity makes it non-optimal for use at room temperature (rt). Optimisation of the conditions for conducting KRs at rt using a previously described catalyst (containing a phenyl blocking group) at the 1 mol% level indicates that PPh3 (1 equiv) is beneficial for enantioselectivity and allows KR of (+/-)-1-(naphthyl)ethanol in less than 30 min with s > 15 (i.e. similar to 40% recovered alcohol with > 95% ee). These conditions constitute a convenient and practical method for rapid KR of sec-alcohols and are anticipated to facilitate a detailed kinetic study of this catalytic manifold by calorimetry. (c) 2005 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2005.08.124
• 作为产物：
  描述：

  乙酸异丙烯酯 、 1-(2-甲基苯基)乙醇 在 Candida antarctica lipase B 、 C₅₁H₄₁P₂Ru⁽¹⁺⁾*C₃₂H₁₂BF₂₄^(1-) 、 potassium carbonate 作用下， 以 甲苯 为溶剂， 反应 16.0h， 以91%的产率得到(R)-1-(2-甲基苯基)乙酸乙酯
  参考文献：
  名称：

  用于仲醇动态动力学拆分的阳离子钌配合物

  摘要：

  描述了利用定义明确的阳离子钌络合物2的合成方案，该阳离子络合物可使对映体纯的仲醇在弱碱（K 2 CO 3）存在下外消旋。2与南极假丝酵母脂肪酶B（Novozym 435）的相容性可在不存在其他强碱的情况下，开发出仲醇的有效动态动力学拆分方法。该方法涉及在阳离子钌催化剂存在下醇的动态动力学拆分的第一个实例。此外，我们描述了单锅反应中酮向富含对映体的乙酸酯的转化，探讨了复合物2的多功能性。

  DOI：

  10.1002/chem.201404096

文献信息

• Nonenzymatic Dynamic Kinetic Resolution of Secondary Alcohols via Enantioselective Acylation: Synthetic and Mechanistic Studies
  作者：Sarah Yunmi Lee、Jaclyn M. Murphy、Atsushi Ukai、Gregory C. Fu

  DOI：10.1021/ja307425g

  日期：2012.9.12

  Because of the ubiquity of the secondary carbinol subunit, the development of new methods for its enantioselective synthesis remains an important ongoing challenge. In this report, we describe the first nonenzymatic method for the dynamic kinetic resolution (DKR) of secondary alcohols (specifically, aryl alkyl carbinols) through enantioselective acylation, and we substantially expand the scope of this

  由于二级甲醇亚基的普遍存在，开发其对映选择性合成的新方法仍然是一个重要的持续挑战。在本报告中，我们描述了通过对映选择性酰化对仲醇（特别是芳烷基甲醇）进行动态动力学拆分 (DKR) 的第一种非酶促方法，并且我们大大扩展了这种方法的范围，与酶促反应相比。简单地将醇的动力学拆分的有效方法与醇的外消旋化的活性催化剂相结合不会导致 DKR，因为钌基外消旋化催化剂与其中使用的酰化剂 (Ac(2)O) 不相容。动力学分辨率。机理研究表明，钌催化剂通过形成稳定的乙酸钌络合物而失活；this deleterious pathway was circumvented through the appropriate choice of acylating agent (an acyl carbonate). 这种新工艺的机理研究表明亲核催化剂的可逆 N-酰化，从催化剂到醇的酰基转移作为速率决定步骤，并且碳酸根阴
• <b>PQXdpap</b>: Helical Poly(quinoxaline-2,3-diyl)s Bearing 4-(Dipropylamino)pyridin-3-yl Pendants as Chirality-Switchable Nucleophilic Catalysts for the Kinetic Resolution of Secondary Alcohols
  作者：Takeshi Yamamoto、Ryo Murakami、Michinori Suginome

  DOI：10.1021/acs.orglett.1c03134

  日期：2021.11.19

  Helically chiral poly(quinoxaline-2,3-diyl)s bearing 4-(dipropylamino)pyridin-3-yl pendants at the 5-position of the quinoxaline ring (PQXdpap) exhibited high catalytic activities and moderate to high selectivities (up to s = 87) in the acylative kinetic resolution of secondary alcohols. The solvent-dependent helical chirality switching of PQXdpap between pure toluene and a 1:1 mixture of toluene and

  在喹喔啉环 ( PQXdpap )的 5 位带有 4-(二丙氨基) 吡啶-3-基侧链的螺旋手性聚 (quinoxaline-2,3-diyl)s表现出高催化活性和中到高选择性（高达s = 87) 在仲醇的酰化动力学拆分中。PQXdpap在纯甲苯和 1:1 的甲苯和 1,1,2-三氯乙烷混合物之间的溶剂依赖性螺旋手性转换能够从单一催化剂。
• Entrapment of Pseudomonas cepacia lipase with peracetylated β-cyclodextrin in sol–gel: application to the kinetic resolution of secondary alcohols
  作者：Ashraf Ghanem、Volker Schurig

  DOI：10.1016/s0957-4166(03)00550-0

  日期：2003.9

  cepacia lipase with peracetylated β-cyclodextrin was immobilized by the sol–gel process. The gel-entrapped lipase/cyclodextrin was prepared by the hydrolysis of methyltrimethoxysilane (MTMS) in the presence of the co-lyophilized lipase with peracetylated β-cyclodextrin prepared with different weight ratios (enzyme to CD). This type of enzyme preparation was subsequently used in the kinetic resolution

  共冻干洋葱假单胞菌过乙酰化β-环糊精的脂肪酶通过溶胶-凝胶法固定化。凝胶包裹的脂肪酶/环糊精是在共冻干脂肪酶与过乙酰化的β-环糊精共存的条件下，通过甲基三甲氧基硅烷（MTMS）的水解而制得的，所述过乙酰化的β-环糊精以不同的重量比（酶与CD）制备。这种类型的酶制剂随后用于动力学拆分一组仲醇，其中乙酸异丙烯酯作为甲苯中无害的酰基供体，作为有机介质。使用气相色谱法在新的手性固定相（CSP）Chirasil-β-Dex上含有十一碳亚甲基间隔基（C11-Chirasil-Dex）的情况下，在不进行衍生化的情况下，将分析中得到的手性醇（底物）和相应的乙酸盐（产物）进行基线分离。 。
• Dynamic Kinetic Resolution of a Wide Range of Secondary Alcohols: Cooperation of Dicarbonylchlorido(pentabenzylcyclopentadienyl)ruthenium and CAL-B
  作者：Mari Päiviö、Denys Mavrynsky、Reko Leino、Liisa T. Kanerva

  DOI：10.1002/ejoc.201001703

  日期：2011.3

  The substrate scope in the dynamic kinetic resolution of secondary alcohols was studied by using 31 structurally different alcohols and isopropenyl acetate in the presence of dicarbonylchlorido(pentabenzylcyclopentadienyl)ruthenium and Candida antarctica lipase B (Novozym435, CAL-B) in toluene. The enzyme and the ruthenium complex were shown to function in a highly compatible manner allowing the conversion

  在二羰基氯（戊苄基环戊二烯基）钌和南极念珠菌脂肪酶 B（Novozym435，CAL-B）存在下，在甲苯中使用 31 种结构不同的醇和乙酸异丙烯酯，研究了仲醇动态动力学拆分中的底物范围。酶和钌络合物显示出以高度相容的方式起作用，允许外消旋醇以实际理论产率转化为 (R)-乙酸酯，并且在大多数情况下，ee 值超过 99%。通过使用早期报道的最先进的钌基催化剂进行醇外消旋化，结果与之前发表的结果完全可比。二羰基氯（五苄基环戊二烯基）钌系统的明显优势，
• Escherichia coli BioH: a highly enantioselective and organic solvent tolerant esterase for kinetic resolution of sec-alcohols
  作者：Bo Wang、Xiaoling Tang、Ji Liu、Hongwei Yu

  DOI：10.1016/j.tetlet.2010.09.135

  日期：2010.12

  Escherichia coli BioH, which is obligatory for biotin synthesis, was found to be an organic solvent tolerant esterase with high enantioselectivity for the kinetic resolution of sec-alcohols using free enzyme powder. With this esterase, a variety of racemic sec-alcohols were efficiently resolved with ee values of up to 99%. (C) 2010 Elsevier Ltd. All rights reserved.