(R)-3-(4-methylphenyl)butanoic acid | 93922-52-2

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 苯丙酸
• 英文名称: (R)-3-(4-methylphenyl)butanoic acid
• 英文别名: (R)-3-(p-tolyl)butanoic acid；(R)-3-p-tolylbutanoic acid；(R)-3-p-tolylbutyric acid；(3R)-3-(4-methylphenyl)butanoic acid
• CAS: 93922-52-2
• 化学式: C₁₁H₁₄O₂
• 分子量: 178.231
• InChiKey: ZWWPDLKCTGONCK-SECBINFHSA-N

物化性质

• 沸点：
  293.6±9.0 °C(Predicted)
• 密度：
  1.067±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：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.36
• 拓扑面积：
  37.3
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (R)-3-(4-methylphenyl)butanoic acid 在 lithium aluminium tetrahydride 、 盐酸 作用下， 以 乙醚 、 水 为溶剂， 反应 1.0h， 生成 (-)-(R)-3-(p-tolyl)butan-1-ol
  参考文献：
  名称：

  Lipase-mediated resolution of substituted 2-aryl-propanols: application to the enantioselective synthesis of phenolic sesquiterpenes

  摘要：

  A comprehensive study of the lipase-mediated resolution of substituted 2-aryl-propanols is reported. The latter alcohols were submitted to the irreversible acetylation catalyzed either by PPL, CRL, or lipase PS. The enantioselectivity of these transformations was dependent on the type of lipase used. The type of substituents and particularly their position on the aromatic ring strongly affected the selectivity of the reaction. The experiments described prove that PPL is the more versatile lipase catalyzing the acetylation with an enantiomeric ratio (E) value that ranges from 1 up to 144, depending on the substrate used. Conversely, the same transformations were catalyzed by CRL and lipase PS with an enantiomeric ratio value, which is always less than 5. The remarkable behavior of PPL was exploited in the large scale resolution of some substituted 2-aryl-propanols whose enantiomeric forms are relevant building blocks in the enantioselective synthesis of phenolic sesquiterpenes. By these means, the synthesis of (S)-turmeronol B and the formal syntheses of (R)-curcumene, (R)-curcuphenol, (R)-xanthorrhizol, and (R)-curcuhydroquinone were accomplished. (C) 2011 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2011.03.012
• 作为产物：
  描述：

  对甲基苯乙酸 在 吡啶 、 氢氧化钾 、 lithium aluminium tetrahydride 、 正丁基锂 、 氯化亚砜 、 sodium hexamethyldisilazane 作用下， 以 四氢呋喃 、 乙二醇 、 二甲基亚砜 为溶剂， 生成 (R)-3-(4-methylphenyl)butanoic acid
  参考文献：
  名称：

  Organic Synthesis in Pheromone Science

  摘要：

  给出了例子来说明化学和/或酶促不对称反应在合成宽角面粉甲虫、跳虫、黑加仑茎切割虫和科罗拉多土豆甲虫的新信息素中的应用。总结了信息素中立体化学与生物活性之间的关系，以强调在信息素感知中揭示的生物多样性。

  DOI：

  10.3390/10091023

文献信息

• Enantioselective Copper-Catalyzed Methylboration of Alkenes
  作者：Bin Chen、Peng Cao、Yang Liao、Min Wang、Jian Liao

  DOI：10.1021/acs.orglett.7b03860

  日期：2018.3.2

  on (B2(pin)2), and methyl iodide is reported. Alkenes including styrenes, β-substituted styrenes, and challenging aliphatic olefins were smoothly transferred to the desired methylboration products with excellent diastereoselectivities (dr up to >99:1) and enantioselectivities (er up to 99:1). The utility of this process was demonstrated by the synthesis of naproxen and formal synthesis of two natural

  据报道，烯烃，双（频哪醇）二硼（B 2（pin）2）和甲基碘的对映选择性铜催化的硼酸酯交叉偶联反应。将包括苯乙烯，β-取代苯乙烯和挑战性脂肪族烯烃在内的烯烃平稳地转移到所需的甲基硼酸酯产品中，该产品具有出色的非对映选择性（dr高达> 99：1）和对映选择性（er高达99：1）。萘普生的合成和两种天然产物的正式合成证明了该方法的实用性。
• Asymmetric synthesis of β-substituted alcanoic acids via highly stereoselective conjugate additions of organocopper compounds to chiral enoates
  作者：Günter Helmchen、Günter Wegner

  DOI：10.1016/s0040-4039(00)95122-0

  日期：1985.1

  Conjugate additions of organocopper compounds RCu·.BF3 to encates of sulfonamide-shielded alcohols 1x and 1n quite generally proceed with > 99% ee and > 90% yield.

  共轭添加有机铜化合物RCu·.BF 3与磺酰胺保护的醇1x和1n结合时，ee的收率通常> 99％，收率> 90％。
• Synthesis of (R)-ar-turmerone and its conversion to (R)-ar-himachalene, a pheromone component of the flea beetle: (R)-ar-himachalene is dextrorotatory in hexane, while levorotatory in chloroform
  作者：Kenji Mori

  DOI：10.1016/j.tetasy.2004.11.077

  日期：2005.2

  (R)-ar-Turmerone was synthesized from (4-methylphenyl)acetic acid by employing Evans asymmetric alkylation as the key step. (R)-ar-Turmerone was converted to (R)-ar-himachalene, which was dextrorotatory in hexane while levorotatory in chloroform. Enantiomerically impure (75% ee) (R)-3-(4-methylphenyl)butanoic acid crystallized more readily than the enantiomerically pure one.

  （- [R ）-芳-Turmerone，由（4-甲基苯基）乙酸通过使用埃文斯不对称烷基化作为关键步骤合成。（- [R ）-芳-Turmerone转化成（- [R ） -芳-himachalene，这是右旋的在己烷中的氯仿，同时左旋的。对映体不纯的（75％ee）（R）-3-（4-甲基苯基）丁酸比对映体纯的更容易结晶。
• Asymmetric conjugate addition reaction by the use of ()-γ-trityloxymethyl-γ-butyrolactam as a chiral auxiliary
  作者：Kiyoshi Tomioka、Toshiro Suenaga、Kenji Koga

  DOI：10.1016/s0040-4039(00)84021-6

  日期：1986.1

  (S)-γ-Trityloxymethyl-γ-butyrolactam (2) serves as a chiral auxiliary in the conjugate addition reaction of the corresponding imide (3) of α,β-unsaturated carboxylic acids with Grignard reagents in the presence of CuBrSMe2 in THF to give, after hydrolysis, the β,β-disubstituted carboxylic acids (5) with predictable absolute configuration and high enantiomeric excess.

  （S）-γ三苯甲氧基甲基γ丁内酰胺（2）用作手性助剂在相应的酰亚胺（的共轭加成反应3 α的），β不饱和羧酸在CuBrSMe的存在下羧酸与格氏试剂2在THF中水解后，得到具有可预测的绝对构型和高对映体过量的β，β-二取代的羧酸（5）。
• Enantioselective ring construction: synthesis of (+)-.alpha.-cuparenone
  作者：Douglass F. Taber、Eric H. Petty、Krishna Raman

  DOI：10.1021/ja00287a035

  日期：1985.1

  Synthese de l'α-cuparenone par cyclisation du p-tolyl-6 oxo-3 oenanthate de methyle. L'insertion C-H intramoleculaire catalysee par le rhodium se fait avec retention de la configuration absolue

  合成这些 de l'α-cuparenone par cyclisation du p-tolyl-6 oxo-3 oenanthate demethyle。L'insertion CH 分子内催化剂 par le rhodium se fait avec reserved de la configuration absolue