1-(4-methoxyphenyl)-4-(p-tolyl)butane-1,4-dione | 364045-34-1

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 1-(4-methoxyphenyl)-4-(p-tolyl)butane-1,4-dione
• 英文别名: 1-(4-Methoxyphenyl)-4-(4-methylphenyl)butane-1,4-dione；1-(4-methoxyphenyl)-4-(4-methylphenyl)butane-1,4-dione
• CAS: 364045-34-1
• 化学式: C₁₈H₁₈O₃
• 分子量: 282.339
• InChiKey: NFDDQRQBLHKYFN-UHFFFAOYSA-N

物化性质

• 沸点：
  458.5±30.0 °C(predicted)
• 密度：
  1.112±0.06 g/cm3(Temp: 20 °C; Press: 760 Torr)(predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  21
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.22
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  聚甘氨酸 、 1-(4-methoxyphenyl)-4-(p-tolyl)butane-1,4-dione 在 对甲苯磺酸 作用下， 以 乙醇 为溶剂， 反应 72.0h， 生成 2-(2-(4-methoxyphenyl)-5-(p-tolyl)-1H-pyrrol-1-yl)acetic acid
  参考文献：
  名称：

  Acylguanidine inhibitors of β-secretase: Optimization of the pyrrole ring substituents extending into the S1 and S3 substrate binding pockets

  摘要：

  Proteolytic cleavage of amyloid precursor protein by beta-secretase (BACE-1) and gamma-secretase leads to formation of beta-amyloid (A beta) a key component of amyloid plaques, which are considered the hallmark of Alzheimer's disease. Small molecule inhibitors of BACE-1 may reduce levels of A beta and thus have therapeutic potential for treating Alzheimer's disease. We recently reported the identification of a novel small molecule BACE-1 inhibitor N-[2-(2,5-diphenyl-pyrrol-1-yl)-acetyl]guanidine (3.a.1). We report here the initial hit-to-lead optimization of this hit and the SAR around the aryl groups occupying the S-1 and S-2' pockets leading to submicromolar BACE-1 inhibitors. (C) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmcl.2007.12.010
• 作为产物：
  描述：

  4-碘甲苯 在 bis(η3-allyl-μ-chloropalladium(II)) 、 potassium formate 、 四丁基碘化铵 、 N,N-二异丙基乙胺 、 tricyclohexylphosphine tetrafluoroborate 、 bis(dibenzylideneacetone)-palladium⁽⁰⁾ 、 2-二环己基磷-2,4,6-三异丙基联苯 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 乙腈 为溶剂， 反应 36.0h， 生成 1-(4-methoxyphenyl)-4-(p-tolyl)butane-1,4-dione
  参考文献：
  名称：

  钯催化的1，4-二酮羰基化偶联策略的发展

  摘要：

  我们报告了一种三组分钯催化的偶联策略，可用于广泛的1,4-二酮，这些化合物代表杂环的重要前体。我们的方法依赖于采用取代的烯丙醇，芳基碘化物和一氧化碳的羰基Heck反应。反应条件温和并且不需要高的CO压力，并且揭示了宽的官能团耐受性，以中等至良好的产率提供了所需的1，4-二酮。此外，该方法适用于在羰基位置之一或两个位置选择性地安装13 C-碳同位素。

  DOI：

  10.1021/acscatal.6b00733

文献信息

• Organic Dye-Catalyzed Intermolecular Radical Coupling of α-Bromocarbonyls with Olefins: Photocatalytic Synthesis of 1,4-Ketocarbonyls Using Air as an Oxidant
  作者：Soumyadeep Roy Chowdhury、Deepak Singh、Injamam Ul Hoque、Soumitra Maity

  DOI：10.1021/acs.joc.0c01985

  日期：2020.11.6

  α-bromocarbonyls where aerial oxygen played a role of an oxidant to install the keto-oxygen functionality. This unique process is compatible with both internal and terminal olefins and tolerates a diverse array of functional groups (ketone, ester, amide, diketones, ketoester, and malonate). This process is mild and environmentally friendly and deals with greener oxidants like oxygen, affording 1,4-ketocarbonyls as

  在α-溴羰基的帮助下，已经公开了乙烯基芳烃的有机染料催化的可见光促进的酮羰基化方案，其中空气中的氧起氧化剂的作用以安装酮氧官能团。这种独特的方法可与内部和末端烯烃兼容，并能耐受各种官能团（酮，酯，酰胺，二酮，酮酸酯和丙二酸酯）。此过程温和且环保，可处理较绿色的氧化剂，例如氧气，可提供1,4-酮羰基化合物作为增值的最终产品。
• N-Methoxy-N-methyl-3-bromopropionamide: a new three carbon homologating agent for the synthesis of unsymmetrical 1,4-diketones
  作者：V Selvamurugan、I.S Aidhen

  DOI：10.1016/s0040-4020(01)00571-3

  日期：2001.7

  A synthetic route based on a three carbon homologation of an α-aminonitrile was developed for the synthesis of unsymmetrical 1,4-diketones. The key steps were the alkylation of various aryl and heteroaryl α-aminonitriles with N-methoxy-N-methyl-3-bromopropionamide followed by the addition of a Grignard reagent to the alkylated product and then subsequent hydrolysis.

  开发了一种基于α-氨基腈三碳同系物的合成路线，用于合成不对称的1,4-二酮。关键步骤是用N-甲氧基-N-甲基-3-溴丙酰胺对各种芳基和杂芳基α-氨基腈进行烷基化，然后将Grignard试剂添加到烷基化产物中，然后进行水解。
• Silver-Catalyzed Controlled Intermolecular Cross-Coupling of Silyl Enol Ethers: Scalable Access to 1,4-Diketones
  作者：Li Xu、Xiaoyi Liu、Gregory R. Alvey、Andrey Shatskiy、Jian-Quan Liu、Markus D. Kärkäs、Xiang-Shan Wang

  DOI：10.1021/acs.orglett.2c01477

  日期：2022.7.1

  A protocol for silver-catalyzed controlled intermolecular cross-coupling of silyl enolates is disclosed. The protocol displays good functional group tolerance and allows efficient preparation of a series of synthetically useful 1,4-diketones. Preliminary mechanistic investigations suggest that the reaction proceeds through a one-electron process involving free radical species in which PhBr acts as

  公开了一种用于甲硅烷基烯醇化物的银催化受控分子间交叉偶联的方案。该协议显示出良好的官能团耐受性，并允许有效制备一系列合成有用的 1,4-二酮。初步的机理研究表明，该反应通过一个单电子过程进行，其中涉及自由基物质，其中 PhBr 充当氧化剂。
• Electrochemical chemoselective hydrogenation of 1,4-enediones with HFIP as the hydrogen donor: scalable access to 1,4-diketones
  作者：Hao-Ran Li、Xue-Yang Guo、Ming-Zhong Guo、Kui Liu、Li-Rong Wen、Ming Li、Lin-Bao Zhang

  DOI：10.1039/d3ob01465g

  日期：——

  versatile 1,4-diketones are smoothly generated under metal-free and external-reductant-free electrolytic conditions. Moreover, the tolerance of various functional groups and decagram-scale experiments have shown the practicability and potential applications of this methodology. Moreover, a range of heterocyclic compounds were easily prepared through follow-up procedures of 1,4-diketones.

  已经报道了在未分割的电池中有效氢化不饱和 C C 键的简单电化学方案。在无金属和无外部还原剂的电解条件下顺利生成一系列多功能的1,4-二酮。此外，各种官能团的耐受性和十克规模的实验表明了该方法的实用性和潜在应用。此外，通过1,4-二酮的后续程序可以轻松制备一系列杂环化合物。
• Palladium-catalyzed coupling of amides and cyclopropanols for the synthesis of γ-diketones
  作者：Lili Fang、Shuqi Jia、Shuaixin Fan、Jin Zhu

  DOI：10.1039/d3cc02888g

  日期：——

  method has been developed for the coupling of amides and cyclopropanols to γ-diketones, through simultaneous C–N and C–C activation. Heteroatom ligand exchange and heteroatom-to-carbon ligation mode switching enable the achievement of molecular cross-coupling in an amide N-atom structural context-dependent manner, avoiding any stoichiometric organometallic reagent or base.

  开发了一种钯催化方法，通过同时 C-N 和 C-C 活化，将酰胺和环丙醇偶联成 γ-二酮。杂原子配体交换和杂原子-碳连接模式切换能够以酰胺N原子结构上下文相关的方式实现分子交叉偶联，避免任何化学计量的有机金属试剂或碱。