(R)-1-(p-tolyl)ethyl acetate | 84194-74-1

• 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)-1-(p-tolyl)ethyl acetate
• 英文别名: [(1R)-1-(4-methylphenyl)ethyl] acetate
• CAS: 84194-74-1
• 化学式: C₁₁H₁₄O₂
• 分子量: 178.231
• InChiKey: HOKHCDLSYKTSOU-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-(p-tolyl)ethyl acetate 在 甲醇 、 三丁基膦 、 sodium hydroxide 作用下， 以 四氢呋喃 为溶剂， 反应 17.0h， 生成 phenyl[1-(4-tolylethyl)]selane
  参考文献：
  名称：

  Chemoenzymatic approaches to obtain chiral-centered selenium compounds

  摘要：

  The synthesis of chiral-centered selenium compounds is presented. Enantioselective oxidations of these organoselenium compounds were performed using a wide range of biocatalysts, including Baeyer-Villiger monooxygenases, oxidoreductases-containing Aspergillus terreus and lipase (Cal-B) in the presence of oxidants. Finally, efficient synthesis of enantiopure organoselenium compounds using a kinetic resolution approach mediated by Cal-B was achieved. (C) 2012 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2012.09.087
• 作为产物：
  描述：

  对甲基苯乙酮 在 sodium tetrahydroborate 、 immobilized CALB lipase 作用下， 以 甲醇 为溶剂， 反应 32.67h， 生成 (R)-1-(p-tolyl)ethyl acetate
  参考文献：
  名称：

  A tandem and fully enzymatic procedure for the green resolution of chiral alcohols: acylation and deacylation in non-aqueous media

  摘要：

  A green and fully enzymatic procedure for the resolution of chiral alcohols through lipase/esterase-catalyzed acylation and subsequent lipase-catalyzed aminolysis using anhydrous ammonia was demonstrated. Both enantiomers can be obtained in high ee values (up to >99%) under ambient reaction conditions. The solvent and acyl donors can be recycled, and the enzyme can be reused for up to five times. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2011.05.022

文献信息

• Synthesis of Chiral Hydroxyl Phospholanes from <scp>d</scp>-mannitol and Their Use in Asymmetric Catalytic Reactions
  作者：Wenge Li、Zhaoguo Zhang、Dengming Xiao、Xumu Zhang

  DOI：10.1021/jo000066c

  日期：2000.6.1

  Strategies for protection and deprotection of OH-groups in the presence of phosphines have been explored. Rate acceleration in the Baylis-Hillman reaction was observed when a hydroxyl phosphine was used as the catalyst. Rhodium complexes with chiral bisphospholanes are highly enantioselective catalysts for the asymmetric hydrogenation of various kinds of functionalized olefins such as dehydroamino

  手性羟基一膦3 [（2S，3S，4S，5S）-3,4-二羟基-2，5-二甲基-1-苯基膦烷]和双膦酸酯5a [1,2-双[（2S，3S，4S，5S） -3,4-二羟基-2,5-二甲基磷杂环戊烷基]苯]和5b [1,2-双[（2S，3S，4S，5S）-2,5-二乙基-3,4-二羟基磷杂环戊基]苯]从现成的D-甘露醇中以高收率获得。已经研究了在膦存在下保护和脱保护OH-基团的策略。当使用羟基膦作为催化剂时，在Baylis-Hillman反应中观察到速率加速。铑与手性双膦酸酯的络合物是高度对映选择性的催化剂，用于各种官能化烯烃（如脱氢氨基酸衍生物，衣康酸衍生物和烯酰胺）的不对称氢化。
• Synthesis of Chiral Aromatic Alcohols: Use of New C₂-Symmetric Rh^IIICp∗, Ru^II(cymene), or Ru^II(benzene) Complexes Containing Chiral Diaminocyclohexane Ligand as Asymmetric Transfer Hydrogenation Catalyst
  作者：Rubén Montalvo-González、Daniel Chávez、Gerardo Aguirre、Miguel Parra-Hake、Ratnasamy Somanathan

  DOI：10.1080/00397910802663451

  日期：2009.7.7

  Abstract Twelve chiral secondary alcohols were synthesized by asymmetric transfer hydrogenation (ATH) using C2-symmetric bis(sulfonamide) ligand (2) derived from (1R,2R)-cyclohexane-1,2-diamine and complexed with [RhCl2Cp*]2, [RuCl2(cymene)]2, or [RuCl2(benzene)]2 and then used in situ in the reduction of prochiral ketones. The alcohols were obtained in 85–99% yield and 90–99% enantioselectivity with

  摘要 使用衍生自 (1R,2R)-环己烷-1,2-二胺并与 [RhCl2Cp*]2 络合的 C2-对称双（磺酰胺）配体 (2)，通过不对称转移氢化 (ATH) 合成了 12 种手性仲醇， [RuCl2(cymene)]2 或 [RuCl2(苯)]2，然后原位用于还原前手性酮。以异丙醇作为氢源以 85-99% 的收率和 90-99% 的对映选择性获得醇。使用复合物 [RhCl2Cp*]2 和甲酸钠水溶液作为氢源，以 80-99% 的对映选择性实现了两倍的速率提高和更好的产率（88-99%）。
• Core-Shell Composite as the Racemization Catalyst in the Dynamic Kinetic Resolution of Secondary Alcohols
  作者：Jie Wang、Dong-Minh Do、Gaik-Khuan Chuah、Stephan Jaenicke

  DOI：10.1002/cctc.201200566

  日期：2013.1

  thickness were synthesized and used as racemization catalysts in the one‐pot dynamic kinetic resolution (DKR) of secondary alcohols by using lipase‐catalyzed transesterification. The inert Silicalite‐1 shell covered the external acidic sites of the Beta zeolite core, suppressing dehydration and non‐enantioselective transesterification of the alcohol. The alcohols could penetrate the Silicalite‐1 shell

  合成了具有可控壳厚度的Beta–Silicalite-1核壳微复合材料，并通过脂肪酶催化的酯交换反应，将其用作消旋催化剂，用于仲醇的一锅动力学动力学拆分（DKR）。惰性Silicalite-1壳覆盖了Beta沸石核的外部酸性位，从而抑制了醇的脱水和非对映选择性酯交换。醇可能会穿透Silicalite-1壳，进入Beta核心的酸性位点进行消旋作用，但是，由于酶的形成（R）-酯的尺寸较大，因此被排除在外。结果，（R的高ee）保留了酯类产品，并将脱水副产物减至最少。由于复合外消旋催化剂的形状选择特性，可以在酶催化的酯交换反应中使用较小且易于获得的酰基供体，以获得高对映体纯度的酯。使用优化的核壳催化剂CS-60，将1-苯基乙醇与乙酸异丙烯酯的DKR形成酯的选择性为92％，并以94％ee形成所需的（R）-1-苯基乙酸乙酯。
• Mechanochemical Enzymatic Kinetic Resolution of Secondary Alcohols under Ball-Milling Conditions
  作者：José G. Hernández、Marcus Frings、Carsten Bolm

  DOI：10.1002/cctc.201600455

  日期：2016.5.20

  Surprisingly, mechanochemical enzymatic transformations have only scarcely been studied until now. Here, we demonstrate the use of lipase B from Candida antarctica (CALB) in acylative kinetic resolutions of secondary alcohols in mixer and planetary mills. Despite the mechanical stress caused by the high‐speed ball milling, the biocatalyst proved highly effective, stable, and, in part, recyclable under the

  机械合成是一种有价值的技术，为制备有机，无机和有机金属产品提供了有吸引力的替代方法。出人意料的是，到目前为止，几乎没有研究过机械化学酶促转化。在这里，我们证明了来自南极假丝酵母（CALB）的脂肪酶B在混合机和行星磨机中仲醇的酰基化动力学拆分中的用途。尽管高速球磨产生了机械应力，但该生物催化剂被证明在所施加的机械化学条件下非常有效，稳定并且可以部分回收。
• One-pot kinetic resolution–Mitsunobu reaction to access optically pure compounds, using silver salts in the substitution protocol
  作者：Hiten B. Raval、Ashutosh V. Bedekar

  DOI：10.1039/d0nj04802j

  日期：——

  Racemic carbinols were converted to chirally pure acetates by a combination of one-pot, enzyme mediated KR and Mitsunobu reaction with metal acetates. Use of AoNO3 or mixture with NaOAc gave excellent results. The protocol is further extended to introduce azide in place of acetate.

  通过一锅法、酶介导的 KR 和 Mitsunobu 与金属乙酸盐的反应，将外消旋甲醇转化为手性纯乙酸盐。使用 AoNO3 或与 NaOAc 的混合物得到了极好的结果。该协议进一步扩展以引入叠氮化物代替醋酸盐。