3,4-Dimethyl-zimtsaeure

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 肉桂酸及其衍生物
• 英文名称: 3,4-Dimethyl-zimtsaeure
• 英文别名: 3,4-Dimethylcinnamic acid；3-(3,4-dimethylphenyl)prop-2-enoic acid
• 化学式: C₁₁H₁₂O₂
• mdl: MFCD00017541
• 分子量: 176.215
• InChiKey: FUVFAUBWEXSLEY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  13
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.18
• 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：

  3,4-Dimethyl-zimtsaeure 在 lithium aluminium tetrahydride 、 氯化亚砜 、 三氟甲磺酸 作用下， 以 1,4-二氧六环 、 乙醚 为溶剂， 反应 5.17h， 生成 N-甲基-3,3-二苯基丙胺
  参考文献：
  名称：

  Tandem superelectrophilic hydroarylation of C C bond and carbonyl reduction in cinnamides: synthetic rout to 3,3-diarylpropylamines, valuable pharmaceuticals

  摘要：

  Cinnamides ArCH=CHCONRR' in reactions with arenes Ar'H under the action of Bronsted (TfOH, FSO3H) or Lewis (AlBr3) superacids at rt for 1-2 h give C=C bond hydroarylation products ArAr'CHCH2CONRR' in yields of 63-98%. Reduction (LiAlH4/Et2O) of carbonyl group in the latter results in the formation of 3,3-diarylpropylamines ArAr'CHCH2CH2NRR', valuable drugs. The reaction intermediates, superelectrophilic dications ArC+H-CH2C(OH+)NRR', have been characterized by DFT calculations in terms of global electrophilicity index, natural charges, and atomic orbitals contributions. (C) 2014 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2014.11.033
• 作为产物：
  描述：

  3,4-二甲基苯甲酸甲酯 在 哌啶 、 吡啶 、 lithium aluminium tetrahydride 、 pyridinium chlorochromate 作用下， 以 乙醚 、 二氯甲烷 为溶剂， 反应 53.0h， 生成 3,4-Dimethyl-zimtsaeure
  参考文献：
  名称：

  Aromatische Spirane, 20. Mitt.: Darstellung von dimethylsubstituierten 2-Carboxymethyl-indan-1-onen und Benzylchloriden als Synthone f�r Synthesen von di- bis tetramethylierten 2,2?-Spirobiindandionen

  摘要：

  The isomeric dimethyl methylbenzoates 5, obtained from the bromides via Grignard reactions with dimethylcarbonate, were reduced with LiAlH4 to the hydroxymethyl derivatives 6. The latter were then transformed both to the benzylchlorides 7 (with SOCl2) and to the aldehydes 8 (with pyridinium chlorochromate). Knoevenagel-Doebner reaction of 8 afforded the acrylic acids 9 which (after hydrogenation to 11) were cyclized to the desired indanones 12 with polyphosphoric acid. On the other hand, 12c and 12e were prepared from dimethyl 3-chloropropiophenone (14) by warming with sulfuric acid. After NaH-catalyzed reaction with dimethylcarbonate, the indanones 12 gave the ketoesters 15 which then could be hydrogenated to the indanes 16. All reactions proceeded with satisfactory to excellent yields (60-90%).

  DOI：

  10.1007/bf00807400

文献信息

• Ligand-accelerated non-directed C–H functionalization of arenes
  作者：Peng Wang、Pritha Verma、Guoqin Xia、Jun Shi、Jennifer X. Qiao、Shiwei Tao、Peter T. W. Cheng、Michael A. Poss、Marcus E. Farmer、Kap-Sun Yeung、Jin-Quan Yu

  DOI：10.1038/nature24632

  日期：2017.11

  challenges associated with the lack of sufficiently active palladium catalysts. Currently used palladium catalysts are reactive only with electron-rich arenes, unless an excess of arene is used, which limits synthetic applications. Here we report a 2-pyridone ligand that binds to palladium and accelerates non-directed C–H functionalization with arene as the limiting reagent. This protocol is compatible with

  碳氢键 (C-H) 的定向活化在合成有用反应的发展中很重要，因为通过配位官能团实现了邻近诱导的反应性和选择性。钯催化的非定向 C-H 活化有可能实现进一步有用的反应，因为它可以到达更远的位置并应用于不含适当定向基团的底物；然而，由于缺乏足够活性的钯催化剂，它的发展面临着巨大的挑战。目前使用的钯催化剂仅与富电子芳烃反应，除非使用过量的芳烃，这限制了合成应用。在这里，我们报告了一种 2-吡啶酮配体，它与钯结合并以芳烃为限制剂加速非定向 C-H 功能化。该协议与广泛的芳香底物兼容，我们展示了不能过量使用的高级合成中间体、药物分子和天然产物的直接功能化。我们还开发了 C-H 烯化和羧化方案，证明了我们的方法对其他转化的适用性。这些转化中的位点选择性受空间和电子效应的组合控制，吡啶酮配体增强了空间对选择性的影响，从而为定向 C-H 功能化提供了互补的选择性。该协议与广泛的芳香底物兼容，我们展示了不能
• Copper-Catalyzed C-P Coupling through Decarboxylation
  作者：Jie Hu、Ning Zhao、Bin Yang、Ge Wang、Li-Na Guo、Yong-Min Liang、Shang-Dong Yang

  DOI：10.1002/chem.201003561

  日期：2011.5.9

  developed by copper‐catalyzed decarboxylative coupling of alkenyl, alkynyl carboxylic acids, and N‐benzylproline, respectively, with R2P(O)H (see scheme). All classes of products are important precursors for preparation of biologically active molecules and various phosphorus ligands. This finding represents the first example of copper‐catalyzed decarboxylative coupling to construct CP bonds.

  膦酸：通过铜催化的烯基，炔基羧酸和N-苄基脯氨酸分别与R 2 P（O）H（参见方案）。所有种类的产品都是制备生物活性分子和各种磷配体的重要前体。这一发现表示铜催化脱羧耦合构造C的第一示例 P键。
• Peroxide promoted tunable decarboxylative alkylation of cinnamic acids to form alkenes or ketones under metal-free conditions
  作者：Jing Ji、Ping Liu、Peipei Sun

  DOI：10.1039/c5cc01762a

  日期：——

  In the presence of DTBP or DTBP/TBHP, the decarboxylative alkylation of cinnamic acids with alkanes gave alkenes and ketones respectively via a radical mechanism in moderate to good yields.

  在DTBP或DTBP / TBHP的存在下，肉桂酸与烷烃的脱羧烷基化分别通过自由基机理分别以中等至良好的收率得到烯烃和酮。
• Enantioselective Epoxidation of Electron-Deficient Alkenes Catalyzed by Manganese Complexes with Chiral N₄ Ligands Derived from Rigid Chiral Diamines
  作者：Xiangning Chen、Bao Gao、Yijin Su、Hanmin Huang

  DOI：10.1002/adsc.201700541

  日期：2017.8.7

  series of tetradentate sp2N/sp3N hybrid chiral N4 ligands derived from rigid chiral diamines were synthesized, which enabled the first manganese-catalyzed enantioselective epoxidation of electron-deficient alkenes with hydrogen peroxide (H2O2) as an oxidant. The reaction furnishes enantiomerically pure epoxy amides, epoxy ketones as well as epoxy esters in good yields and excellent enantioselectivities

  合成了一系列衍生自刚性手性二胺的四齿sp 2 N / sp 3 N杂合手性N 4配体，这使锰能够以过氧化氢（H 2 O 2）为氧化剂，首次对缺电子烯烃进行对映选择性环氧化。。该反应以较低的催化剂负载量提供了对映体纯的环氧酰胺，环氧酮以及环氧酯，具有良好的收率和优异的对映选择性（最高99.9％ee）。对结构-活性关系的初步研究表明，保持sp 3的相对较低的供电子能力N和N 2配体的sp 2 N的相对较高的供电子能力有利于获得更高的活性和选择性，从而为我们理解H 2 O 2的环氧化提供了新的视角。
• Synthesis of di- and tetraalkyl-3-piperazinoisoquinolines and related compounds as potential antidepressant agents
  作者：Wilhelm Bartmann、Elmar Konz、Wolfgang Rüger

  DOI：10.1002/jhet.5570240326

  日期：1987.5

  A series of di- and tetraalkyl-3-piperazinoisoquinolines and related compounds was synthesized via di- and tetraalkylated 1-indanones as intermediates.

  经由二烷基和四烷基化的1-茚满酮作为中间体合成了一系列二烷基和四烷基-3-哌嗪子异喹啉和相关化合物。