(R)-2,2,2-trifluoro-1-p-tolylethanol | 72487-05-9

• 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)-2,2,2-trifluoro-1-p-tolylethanol
• 英文别名: (R)-alpha-(Trifluoromethyl)-4-methylbenzenemethanol；(1R)-2,2,2-trifluoro-1-(4-methylphenyl)ethanol
• CAS: 72487-05-9
• 化学式: C₉H₉F₃O
• 分子量: 190.165
• InChiKey: LNYGOJDJKXEXDR-MRVPVSSYSA-N

物化性质

• 沸点：
  230.8±40.0 °C(Predicted)
• 密度：
  1.241±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.5
• 重原子数：
  13
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  20.2
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  4-(三氟乙酰基)甲苯 在 magnesium(II) perchlorate 、 (4R)-3-(N-(R)-α-methylbenzylcarbamoyl)-1-propyl-2,4-dimethyl-1,4-dihydropyridine 作用下， 以 乙腈 为溶剂， 生成 (R)-2,2,2-trifluoro-1-p-tolylethanol
  参考文献：
  名称：

  Reduction by a model of NAD(P)H. 25. A chiral model which induces high asymmetry

  摘要：

  DOI：

  10.1021/ja00517a043

文献信息

• Nonenzymatic kinetic resolution of racemic 2,2,2-trifluoro-1-aryl ethanol via enantioselective acylation
  作者：Qing Xu、Hui Zhou、Xiaohong Geng、Peiran Chen

  DOI：10.1016/j.tet.2009.01.058

  日期：2009.3

  Kinetic resolution of a series of 2,2,2-trifluoro-1-aryl ethanol with (R)-benzotetramisole as the catalyst has been investigated. The result showed that when the aryl group in the substrate was a phenyl (or a phenyl substituted by an electron-donating group) or a naphthyl (an extended phenyl) group, the system could give an s value higher than 20. Preparative KR examples demonstrated the applicability

  研究了一系列以（R）-苯并四咪唑为催化剂的2,2,2-三氟-1-芳基乙醇的动力学拆分。结果表明，当底物中的芳基为苯基（或被供电子基团取代的苯基）或萘基（延伸的苯基）时，该体系的s值可大于20。制备KR实例证明该方法在制备一些对映体纯的2,2,2-三氟-1-芳基乙醇或2,2,2-三氟-1-芳基-乙基异丁酸酯中的适用性。
• Rational electronic tuning of CBS catalyst for highly enantioselective borane reduction of trifluoroacetophenone
  作者：Toshinobu Korenaga、Kenji Nomura、Kazutaka Onoue、Takashi Sakai

  DOI：10.1039/c0cc03706k

  日期：——

  α,α,α-Trifluoroacetophenone (2), which is susceptible to noncatalytic reduction by BH3, could be reduced to chiral alcohol up to 90% ee by using electronically tuned-CBS catalyst (1) with BH3. The enantioselectivities highly correlated with the differential orbital energies between 1–BH3 adduct and 2, which were calculated by DFT method.

  α,α,α-三氟乙酰苯（2），该物质易受BH3非催化还原，可通过使用电子调谐CBS催化剂（1）与BH3反应，将其还原为手性醇，最高可达90%的ee值。通过DFT方法计算，其对映选择性与1–BH3加合物和2之间的轨道能量差异高度相关。
• Chemo- and Enantioselective Addition and β-Hydrogen Transfer Reduction of Carbonyl Compounds with Diethylzinc Reagent in One Pot Catalyzed by a Single Chiral Organometallic Catalyst
  作者：Huayin Huang、Hua Zong、Guangling Bian、Ling Song

  DOI：10.1021/acs.joc.5b01871

  日期：2015.12.18

  as the catalyst, the asymmetric β-H transfer reduction of aromatic α-trifluoromethyl ketones and enantioselective addition of aromatic aldehydes with Et2Zn in one pot were successfully realized, affording the corresponding additive products of secondary alcohols in high yields (up to 99%) with excellent enantioselectivities (up to 98% ee) and the reduction products of α-trifluoromethyl alcohols in good

  以单一手性磷酰胺-Zn（II）配合物为催化剂，成功实现了芳族α-三氟甲基酮的不对称β-H转移还原和在一个罐中与Et 2 Zn对映体选择性加成芳族醛，从而提供了相应的添加剂产品高收率（高达99％）的仲醇，具有出色的对映选择性（高达98％ee），α-三氟甲基醇的还原产物，收率高达77％ee，优良至优异。
• Asymmetric Hydrogenation of Aryl Perfluoroalkyl Ketones Catalyzed by Rhodium(III) Monohydride Complexes Bearing Josiphos Ligands
  作者：Fabian Brüning、Haruki Nagae、Daniel Käch、Kazushi Mashima、Antonio Togni

  DOI：10.1002/chem.201902585

  日期：2019.8.14

  The asymmetric hydrogenation of 2,2,2-trifluoroacetophenones and aryl perfluoroalkyl ketones was developed using a unique, well-defined chloride-bridged dinuclear rhodium(III) complex bearing Josiphos-type diphosphine ligands. These complexes were prepared from [RhCl(cod)]2 , Josiphos ligands, and hydrochloric acid. As catalyst precursors, they allow for the efficient and enantioselective synthesis

  2，2，2-三氟苯乙酮和芳基全氟烷基酮的不对称氢化反应是使用独特的，定义明确的带有Josiphos型二膦配体的氯桥联二核铑（III）络合物开发的。这些配合物是由[RhCl（cod）] 2，Josiphos配体和盐酸制备的。作为催化剂的前体，它们允许具有全氟烷基的手性仲醇的有效和对映选择性合成（最高99％ee）。该系统不需要用于2,2,2-三氟苯乙酮氢化的活化碱。另外，首次报道了2-苯基-3-（卤代乙酰基）吲哚的对映选择性C ＝ O氢化，这是药物化学中的一类特权结构。
• Asymmetric trifluoromethylation of aromatic aldehydes by cooperative catalysis with (IPr)CuF and quinidine-derived quaternary ammonium salt
  作者：Shaoxiang Wu、Wei Zeng、Qi Wang、Fu-Xue Chen

  DOI：10.1039/c2ob26827b

  日期：——

  A general enantioselective trifluoromethylation of aldehydes has been developed using (IPr)CuF and quinidine-derived quaternary ammonium salt as the cooperative catalyst. Thus, a wide range of aromatic aldehydes have been converted to the corresponding products in up to 92% yield and 81% ee at 2 mol% of catalyst loading. The greatly enhanced activity and enantioselectivity result from the initiative generation of active [(IPr)CuCF3] as well as additional coordination activation of other copper species.

  已经开发了一种针对醛类的通用对映选择性三氟甲基化反应，使用(IPr)CuF和奎宁衍生的四价铵盐作为协同催化剂。因此，广泛的芳香醛被转化为相应的产物，产率高达92%，对映体过剩率（ee）为81%，催化剂用量为2摩尔百分比。显著增强的活性和对映选择性源于活性[(IPr)CuCF3]的初始生成以及其他铜物种的额外配位活化。