(E)-4-methyl-1-(1-methyl-1H-imidazol-2-yl)pent-2-en-1-one | 860772-40-3

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: (E)-4-methyl-1-(1-methyl-1H-imidazol-2-yl)pent-2-en-1-one
• 英文别名: (E)-4-Methyl-1-(1-methyl-1H-imidazole-2-yl)-pent-2-en-1-one；(E)-4-methyl-1-(1-methylimidazol-2-yl)pent-2-en-1-one
• CAS: 860772-40-3
• 化学式: C₁₀H₁₄N₂O
• 分子量: 178.234
• InChiKey: GYTOLLZNSDQKOQ-SNAWJCMRSA-N

物化性质

• 沸点：
  310.8±25.0 °C(Predicted)
• 密度：
  1.01±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  13
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  34.9
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (E)-4-methyl-1-(1-methyl-1H-imidazol-2-yl)pent-2-en-1-one 、 4-氰基-3-四氢噻吩酮 在 4,4'-二甲基-2,2'-联吡啶 、 copper(II) bis(trifluoromethanesulfonate) 、 四丁基氢氧化铵 作用下， 以 二氯甲烷 、 甲醇 为溶剂， 反应 0.03h， 生成 3-isopropyl-5-(1-methyl-1H-imidazol-2-yl)-2-methylene-5-oxopentanenitrile
  参考文献：
  名称：

  Direct Access to Highly Enantioenriched α-Branched Acrylonitriles through a One-Pot Sequential Asymmetric Michael Addition/Retro-Dieckmann/Retro-Michael Fragmentation Cascade

  摘要：

  A highly enantioselective synthesis of alpha-branched acrylonitriles is reported featuring a one-pot sequential asymmetric Michael addition/retro-Dieckmann/retro-Michael fragmentation cascade. The method, which relies on a solid, bench-stable, and commercially available acrylonitrile surrogate, is practical, scalable, and highly versatile and provides a direct access to a wide range of enantioenriched nitrite-containing building blocks. Most importantly, the method offers a new tool to incorporate an acrylonitrile moiety in an asymmetric fashion.

  DOI：

  10.1021/acs.orglett.0c02079
• 作为产物：
  描述：

  N-甲基咪唑 、 (2E)-4-methylpent-2-enoic acid 在 正丁基锂 、 溶剂黄146 作用下， 以 四氢呋喃 、 正己烷 为溶剂， 反应 0.67h， 以40%的产率得到(E)-4-methyl-1-(1-methyl-1H-imidazol-2-yl)pent-2-en-1-one
  参考文献：
  名称：

  具有取代不稳定但立体化学稳定的手性金属铱（III）配合物的不对称催化

  摘要：

  报道了一种利用金属中心手性作为唯一手性元素的基于金属配位的高性能不对称催化剂。引入的取代不稳定手性金属八面体铱 (III) 配合物仅带有非手性配体，并以高产率（75%）有效催化吲哚与 α,β-不饱和 2-酰基咪唑（19 个实例）的对映选择性弗里德尔-克拉夫茨加成-99%) 和高对映选择性 (90-98% ee) 在低催化剂负载 (0.25-2 mol %) 下。与直觉相反，尽管其置换不稳定，这是与 2-酰基咪唑底物配位所必需的，但金属中心手性在整个催化过程中保持不变。这种新型的活性手性金属配合物可能对各种不对称转化具有很高的价值。

  DOI：

  10.1021/ja4132505

文献信息

• Highly Efficient Cyclic Dinucleotide Based Artificial Metalloribozymes for Enantioselective Friedel–Crafts Reactions in Water
  作者：Changhao Wang、Min Hao、Qianqian Qi、Jingshuang Dang、Xingchen Dong、Shuting Lv、Ling Xiong、Huanhuan Gao、Guoqing Jia、Yashao Chen、Jörg S. Hartig、Can Li

  DOI：10.1002/anie.201912962

  日期：2020.2.24

  construct artificial metalloenzymes (ArMs) for enantioselective catalysis. DNA-based ArMs containing duplex and G-quadruplex scaffolds have been widely investigated, yet RNA-based ArMs are scarce. Here we report that a cyclic dinucleotide of c-di-AMP and Cu2+ ions assemble into an artificial metalloribozyme (c-di-AMP⋅Cu2+ ) that enables catalysis of enantioselective Friedel-Crafts reactions in aqueous

  核酸的各种二级结构正以吸引人的手性支架的形式出现，以构建用于对映选择性催化的人工金属酶（ArM）。包含双链体和G-四链体支架的基于DNA的ArM已被广泛研究，但基于RNA的ArM却很少。在这里，我们报道c-di-AMP和Cu2 +离子的环状二核苷酸组装成人工金属核酶（c-di-AMP⋅Cu2+），该催化金属能够在水介质中以高反应性和出色的对映选择性进行催化对映选择性Friedel-Crafts反应。到97％ee。与Cu2 +离子相比，c-di-AMP⋅Cu2+的组装产生了20倍的速率加速。基于各种生物物理技术和密度函数理论（DFT）计算，
• Enantioselective Friedel−Crafts Alkylations of α,β-Unsaturated 2-Acyl Imidazoles Catalyzed by Bis(oxazolinyl)pyridine−Scandium(III) Triflate Complexes
  作者：David A. Evans、Keith R. Fandrick、Hyun-Ji Song

  DOI：10.1021/ja052433d

  日期：2005.6.1

  An enantioselective Friedel−Crafts alkylation with α,β-unsaturated 2-acyl imidazoles and electron-rich aromatic nucleophiles catalyzed by bis(oxazolinyl)pyridine−scandium(III) triflate complexes has been accomplished. These α,β-unsaturated 2-acyl imidazoles are effective electrophiles for the Friedel−Crafts reaction. The resulting adduct 2-acyl imidazole is easily converted to amides, esters, carboxylic

  已经完成了由双（恶唑啉基）吡啶-钪（III）三氟甲磺酸盐配合物催化的α，β-不饱和2-酰基咪唑和富电子芳香亲核试剂的对映选择性Friedel-Crafts烷基化反应。这些 α,β-不饱和 2-酰基咪唑是 Friedel-Crafts 反应的有效亲电试剂。通过甲基化和随后的咪唑残基置换，所得加合物 2-酰基咪唑很容易转化为酰胺、酯、羧酸、酮和醛。
• Copper‐Catalyzed Asymmetric Conjugate Addition of Dimethylzinc to Acyl‐ <i>N</i> ‐methylimidazole Michael Acceptors: a Powerful Synthetic Platform
  作者：Sammy Drissi‐Amraoui、Marie S. T. Morin、Christophe Crévisy、Olivier Baslé、Renata Marcia de Figueiredo、Marc Mauduit、Jean‐Marc Campagne

  DOI：10.1002/anie.201506189

  日期：2015.9.28

  An efficient copper‐catalyzed enantioselective conjugate addition of dimethylzinc to α,β‐ and α,β,γ,δ‐unsaturated 2‐acyl‐N‐methylimidazoles has been achieved using a chiral bidentate hydroxyalkyl‐NHC ligand. The reactions proceeded with both excellent regio‐ and enantioselectivity (14 examples, 87–95 % ee) to afford the desired 1,4‐adducts, which were easily transformed to the corresponding aldehydes

  使用手性双齿羟基烷基-NHC配体可实现高效的铜催化对映选择性共轭二甲基锌加成到α，β-和α，β，γ，δ-不饱和2-酰基-N-甲基咪唑。反应进行时具有出色的区域选择性和对映体选择性（14个实例，87-95％ee），得到所需的1,4-加合物，可轻松转化为相应的醛，酯和酮。因此，这种功能强大的方法因此成功地应用于天然产物的合成中。此外，还公开了一种迭代过程，该过程导致了非常理想的1,3--去氧丙酸酯骨架（高达94％de）。
• Asymmetric synthesis of cyclic β-amino carbonyl derivatives by a formal [3 + 2] photocycloaddition
  作者：Leonardo Mollari、Miguel A. Valle-Amores、Ana M. Martínez-Gualda、Leyre Marzo、Alberto Fraile、José Aleman

  DOI：10.1039/d1cc05867c

  日期：——

  reactivity relies on the performance of the substrate-catalyst complex to assist both the enantiocontrol and the photoredox tasks. This transformation led to an enantioselective [3 + 2] photocycloaddition between coordinated α,β-unsaturated acyl imidazoles and cyclopropylamine derivatives.

  本文介绍了一种可见光介导的策略，该策略可解锁具有三个连续立体中心的环状 β-氨基羰基衍生物家族。整体反应性依赖于底物-催化剂复合物的性能，以协助对映控制和光氧化还原任务。这种转化导致了配位的 α,β-不饱和酰基咪唑和环丙胺衍生物之间的对映选择性 [3 + 2] 光环加成反应。
• Enantioselective Friedel−Crafts Alkylations Catalyzed by Bis(oxazolinyl)pyridine−Scandium(III) Triflate Complexes
  作者：David A. Evans、Keith R. Fandrick、Hyun-Ji Song、Karl A. Scheidt、Risheng Xu

  DOI：10.1021/ja072976i

  日期：2007.8.1

  The enantioselective Friedel-Crafts addition of a variety of indoles catalyzed by bis(oxazolinyl)pyridine-scandium(III) triflate complexes (Sc(III)-pybox) was accomplished utilizing a series of beta-substituted alpha,beta-unsaturated phosphonates and alpha,beta-unsaturated 2-acyl imidazoles. The acyl phosphonate products were efficiently transformed into esters and amides, whereas the acyl imidazole adducts were converted to a broader spectrum of functionalities such as esters, amides, carboxylic acids, ketones, and aldehydes. The sense of stereoinduction and level of enantioselectivity were found to be functions of the size of the substrate employed, the substitution on the ligand, and the catalyst loading. Molecular modeling of the catalyst with the bound substrates was performed based on the crystal structures of the catalyst complexes and the sense of stereoinduction observed in the addition reaction. Nonlinear effects over a range of catalyst concentrations implicate a mononuclear complex as the active catalyst.