2,4-dimethyl-1-phenylpentan-3-one | 23936-97-2

• 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: 2,4-dimethyl-1-phenylpentan-3-one
• 英文别名: 2,4-Dimethyl-1-phenyl-3-pentanone
• CAS: 23936-97-2
• 化学式: C₁₃H₁₈O
• 分子量: 190.285
• InChiKey: IKCBFRJUYBPBCG-UHFFFAOYSA-N

物化性质

• 沸点：
  267.3±9.0 °C(Predicted)
• 密度：
  0.938±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3.5
• 重原子数：
  14
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.46
• 拓扑面积：
  17.1
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  2-benzyl-1-isopropylcyclopropanol 在 bis[dichloro(pentamethylcyclopentadienyl)iridium(III)] 作用下， 以 甲苯 为溶剂， 反应 18.0h， 以86%的产率得到2,4-dimethyl-1-phenylpentan-3-one
  参考文献：
  名称：

  Synthesis of α-methyl ketones by a selective, iridium-catalyzed cyclopropanol ring-opening reaction

  摘要：

  A mild method for synthesizing a-methyl ketones from substituted cyclopropanols is reported. This process, catalyzed by [Cp*IrCl2](2), cleaves cyclopropanol rings regioselectively and more efficiently than the other conditions examined. While tertiary cyclopropanols afford a-methyl ketones, secondary cyclopropanols and cyclopropyl silyl ethers are less reactive and yield other isomerization products. (C) 2010 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2010.10.067

文献信息

• Rhodium-Catalyzed Ketone Methylation Using Methanol Under Mild Conditions: Formation of α-Branched Products
  作者：Louis K. M. Chan、Darren L. Poole、Di Shen、Mark P. Healy、Timothy J. Donohoe

  DOI：10.1002/anie.201307950

  日期：2014.1.13

  The rhodium‐catalyzed methylation of ketones has been accomplished using methanol as the methylating agent and the hydrogen‐borrowing method. The sequence is notable for the relatively low temperatures that are required and for the ability of the reaction system to form α‐branched products with ease. Doubly alkylated ketones can be prepared from methyl ketones and two different alcohols by using a

  使用甲醇作为甲基化剂和借氢方法完成了铑催化的酮的甲基化。该序列的显着之处在于所需的温度相对较低，并且反应系统能够轻松形成 α 支化产物。双烷基化酮可以通过使用连续的一锅铱和铑催化工艺由甲基酮和两种不同的醇制备。
• Rhenium(I)-Catalyzed C-Methylation of Ketones, Indoles, and Arylacetonitriles Using Methanol
  作者：Sujan Shee、Sabuj Kundu

  DOI：10.1021/acs.joc.1c00376

  日期：2021.5.7

  A ReCl(CO)5/MeC(CH2PPh2)3 (L2) system was developed for the C-methylation reactions utilizing methanol and base, following the borrowing hydrogen strategy. Diverse ketones, indoles, and arylacetonitriles underwent mono- and dimethylation selectively up to 99% yield. Remarkably, tandem multiple methylations were also achieved by employing this catalytic system.

  按照借用氢的策略，开发了一种ReCl（CO）5 / MeC（CH 2 PPh 2）3（L2）系统，用于利用甲醇和碱进行C-甲基化反应。对各种酮，吲哚和芳基乙腈进行选择性的单-和二甲基化反应，收率高达99％。值得注意的是，通过采用该催化体系，也能实现串联多个甲基化。
• One-Pot Conversion of Allylic Alcohols to α-Methyl Ketones via Iron-Catalyzed Isomerization–Methylation
  作者：Daniel E. Latham、Kurt Polidano、Jonathan M. J. Williams、Louis C. Morrill

  DOI：10.1021/acs.orglett.9b02900

  日期：2019.10.4

  A one-pot iron-catalyzed conversion of allylic alcohols to α-methyl ketones has been developed. This isomerization-methylation strategy utilized a (cyclopentadienone)iron(0) carbonyl complex as precatalyst and methanol as the C1 source. A diverse range of allylic alcohols undergoes isomerization-methylation to form α-methyl ketones in good isolated yields (up to 84% isolated yield).

  已经开发了一锅铁催化的烯丙基醇向α-甲基酮的转化。这种异构化-甲基化策略使用（环戊二烯酮）铁（0）羰基络合物作为前催化剂，甲醇作为C1来源。各种各样的烯丙醇经历异构化-甲基化以形成良好的分离产率（高达84％分离产率）形成α-甲基酮。
• Syndiotactic Poly(aminostyrene)-Supported Palladium Catalyst for Ketone Methylation with Methanol
  作者：Lei Jiang、Fang Guo、Zhenghai Shi、Yang Li、Zhaomin Hou

  DOI：10.1002/cctc.201700907

  日期：2017.10.23

  Palladium nanoparticles immobilized on an amino‐functionalized syndiotactic polystyrene (sPS‐N) served as a novel recyclable catalyst for the dimethylation and cross methyl alkylation of a wide range of ketones with methanol as the methylation agent. This heterogeneous catalyst (Pd@sPS‐N) was highly robust and showed excellent thermal stability and chemical resistance. It not only showed remarkably high

  固定在氨基官能化间同立构聚苯乙烯（s PS-N）上的钯纳米粒子是新型可循环利用的催化剂，用于以甲醇为甲基化剂的多种酮的二甲基化和交叉甲基烷基化。这种非均相催化剂（Pd @ s PS-N）非常坚固，并显示出出色的热稳定性和耐化学性。它不仅显示出非常高的活性，而且还可以通过过滤容易地回收而又不损失活性。
• Iron-Catalyzed Tandem Three-Component Alkylation: Access to α-Methylated Substituted Ketones
  作者：Léo Bettoni、Charlotte Seck、Mbaye Diagne Mbaye、Sylvain Gaillard、Jean-Luc Renaud

  DOI：10.1021/acs.orglett.9b00630

  日期：2019.5.3

  The borrowing hydrogen strategy has been applied in the synthesis of α-branched methylated ketones via a tandem three-component reaction catalyzed by a diaminocyclopentadienone iron tricarbonyl complex. Various alkyl and aromatic methyl ketones underwent dialkylation with various primary alcohols and methanol as alkylating agents in mild reaction conditions and good yields. Deuterium labeling experiments

  通过二氨基环戊二烯酮三羰基铁络合物催化的串联三组分反应，借位氢策略已应用于α-支化甲基化酮的合成中。各种烷基和芳族甲基酮在温和的反应条件下以良好的收率与各种伯醇和甲醇作为烷基化剂进行了二烷基化反应。氘标记实验表明，在串联过程中，苯甲醇是氢源。