3-(2-methoxybenzyl)pentane-2,4-dione | 791809-42-2

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯酚醚
• 英文名称: 3-(2-methoxybenzyl)pentane-2,4-dione
• 英文别名: 3-[(2-Methoxyphenyl)methyl]pentane-2,4-dione
• CAS: 791809-42-2
• 化学式: C₁₃H₁₆O₃
• 分子量: 220.268
• InChiKey: OYRONNQYKUDAMX-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.3
• 重原子数：
  16
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.38
• 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：

  3-(2-methoxybenzyl)pentane-2,4-dione 在 硫酸 、 双氧水 作用下， 以 乙醇 、 水 为溶剂， 以54%的产率得到7-(2-methoxybenzyl)-1,4-dimethyl-2,3,5,6-tetraoxa-bicyclo[2.2.1]heptane
  参考文献：
  名称：

  Facile and Selective Procedure for the Synthesis of Bridged 1,2,4,5-Tetraoxanes; Strong Acids As Cosolvents and Catalysts for Addition of Hydrogen Peroxide to β-Diketones

  摘要：

  A facile, experimentally simple, and selective method was developed for the synthesis of bridged 1,2,4,5-tetraoxanes based on the reaction of hydrogen peroxide with beta-diketones catalyzed by strong acids (H2SO4, HClO4, HBF4, or BF3). The yields of the target products vary from 44% to 77%. 1,2,4,5-Tetraoxanes can easily be separated from other reaction products by column chromatography. A high concentration of a strong acid is a key factor determining the selectivity of formation and the yield of 1,2,4,5-tetraoxanes. Unlike many compounds containing the O-O bond. which undergo rearrangements in acidic media, the resulting cyclic peroxides are quite stable under these conditions.

  DOI：

  10.1021/jo900226b
• 作为产物：
  描述：

  3-(2-Methoxy-benzyliden)-pentan-2,4-dion 在 三乙基硅烷 、 iron(III) chloride hexahydrate 作用下， 以 二氯甲烷 为溶剂， 生成 3-(2-methoxybenzyl)pentane-2,4-dione
  参考文献：
  名称：

  手性氮杂双恶唑啉-Zn(II) 络合物催化的不对称逆克莱森反应：α-芳基化酮的对映选择性合成

  摘要：

  在手性氮杂双恶唑啉-Zn(II) 络合物的催化下，α-单取代 β-二酮和醌（或醌亚胺）发生了不对称逆克莱森反应。该反应通过一系列共轭加成、芳基化、半缩酮阴离子引发的 C-C 键断裂和烯醇化物的对映选择性质子化进行，以提供各种功能化的 α-芳基化酮，这些酮带有具有高对映选择性的三级立体异构中心。值得注意的是，可以通过应用开发的协议来合成具有生物学意义的苯并呋喃和γ-丁内酯衍生物。

  DOI：

  10.1021/acs.orglett.3c00372

文献信息

• Different products in the reaction of the alcohols with cyclic and acyclic 1,3-dicarbonyl compounds: K5CoW12O40 as an electron transfer nano catalyst
  作者：Ezzat Rafiee、Masoud Kahrizi、Mohammad Joshaghani

  DOI：10.1016/j.cclet.2012.10.011

  日期：2012.12

  benzylation of 1,3-dicarbonyl compounds. β-Keto enol ethers were obtained when cyclic 1,3-dicarbonyl compounds used in this conditions instead of linear ones. The present methodology offers a practical, simple, mild, environmentally friendly, and time-saving method for etherification. Very low loading of catalyst, ease of workup, ease of handling, and reusability of catalyst are other advantages of

  摘要K5CoW12O40被用作1,3-二羰基化合物苄基化的高效催化剂。当在这种条件下使用环状1,3-二羰基化合物代替线性化合物时，可获得β-酮烯醇醚。本方法提供了一种实用，简单，温和，环保且省时的醚化方法。催化剂的极低负载，易于后处理，易于处理以及催化剂的可重复使用性是该催化剂的其他优点。
• [EN] TRIAZINE COMPOUNDS AND THEIR USE<br/>[FR] COMPOSES DE TRIAZINE ET LEUR UTILISATION
  申请人：NOVO PHARMACEUTICALS LTD DE

  公开号：WO2004096808A1

  公开（公告）日：2004-11-11

  A compound of formula (I) wherein R1 is hydrogen, alkyl, -alkyl-aryl, -alkyl-heterocycloalkyl or -alkyl-0-heterocycloalkyl; R2 is hydrogen, hydroxy, amino, nitro, alkoxy, alkyl, aryl or heteroaryl; R3 is hydrogen, alkyl or aryl; R4 is hydrogen, alkyl, aryl, heteroaryl, -CH(aryl)2, -alkyl-aryl or -C(0)0-alkyl; and R5 is alkyl, hydroxy or amino; or a pharmaceutically acceptable salt thereof; is new for use in therapy, e.g. in the treatment of Alzheimer's disease.

  式（I）的化合物中，其中R1是氢，烷基，-烷基-芳基，-烷基-杂环烷基或-烷基-0-杂环烷基；R2是氢，羟基，氨基，硝基，烷氧基，烷基，芳基或杂芳基；R3是氢，烷基或芳基；R4是氢，烷基，芳基，杂芳基，-CH（芳基）2，-烷基-芳基或-C（0）0-烷基；R5是烷基，羟基或氨基；或其药用可接受盐；用于治疗，例如用于治疗阿尔茨海默病。
• Oxidation of Substituted β-Diketones with Hydrogen Peroxide: Synthesis of Esters through the Formation of Bridged 1,2,4,5-Tetraoxanes
  作者：Alexander Terent’ev、Dmitry Borisov、Ivan Yaremenko、Yuri Ogibin、Gennady Nikishin

  DOI：10.1055/s-0029-1219225

  日期：2010.4

  Acid-catalyzed oxidation of alkyl- and benzyl-substituted β-diketones by hydrogen peroxide at 79-120 ˚C in a mixture of an alcohol and a strong acid (sulfuric acid, tetrafluoroboric acid, or perchloric acid) gave the corresponding esters through the formation of bridged 1,2,4,5-tetraoxanes. esters - hydrogen peroxide - oxidations - tetraoxanes - ketones

  在乙醇和强酸（硫酸，四氟硼酸或高氯酸）的混合物中，过氧化氢在79-120℃下用酸催化的烷基和苄基取代的β-二酮的氧化反应，生成相应的酯。形成桥接的1,2,4,5-四恶烷。 酯-过氧化氢-氧化-四恶烷-酮
• 10.1021/acs.joc.4c00511
  作者：Dong, Qing、Yang, Yu-Huan、Lv, Xue-Jiao、Liu, Jia-Hui、Liu, Yan-Kai

  DOI：10.1021/acs.joc.4c00511

  日期：——

  An economical one-pot, three-step reaction sequence of readily available 2-monosubstituted 1,3-diketones and 1,4-benzoquinones has been explored for the facile access of 2,3-dialkyl-5-hydroxybenzofurans. By using cheap K2CO3 and conc. HCl as the reaction promoters, the reaction occurs smoothly via sequential Michael addition, aromatization, retro-Claisen, deacylation, hemiketalization, and dehydration

  为了方便地获得 2,3-二烷基-5-羟基苯并呋喃，我们探索了一种经济的一锅三步反应序列，由容易获得的 2-单取代 1,3-二酮和 1,4-苯醌组成。通过使用廉价的 K 2 CO 3和浓缩物。以HCl为反应促进剂，通过连续的迈克尔加成、芳构化、逆克莱森、脱酰化、半缩酮化和脱水等过程，反应在温和条件下顺利进行，实用性强。此外，在衍生化研究过程中观察到一个有趣的现象，其中二氢喹啉通过歧化过程分别转化为四氢喹啉和喹啉产物。
• Facile and Selective Procedure for the Synthesis of Bridged 1,2,4,5-Tetraoxanes; Strong Acids As Cosolvents and Catalysts for Addition of Hydrogen Peroxide to β-Diketones
  作者：Alexander O. Terent’ev、Dmitry A. Borisov、Vladimir V. Chernyshev、Gennady I. Nikishin

  DOI：10.1021/jo900226b

  日期：2009.5.1

  A facile, experimentally simple, and selective method was developed for the synthesis of bridged 1,2,4,5-tetraoxanes based on the reaction of hydrogen peroxide with beta-diketones catalyzed by strong acids (H2SO4, HClO4, HBF4, or BF3). The yields of the target products vary from 44% to 77%. 1,2,4,5-Tetraoxanes can easily be separated from other reaction products by column chromatography. A high concentration of a strong acid is a key factor determining the selectivity of formation and the yield of 1,2,4,5-tetraoxanes. Unlike many compounds containing the O-O bond. which undergo rearrangements in acidic media, the resulting cyclic peroxides are quite stable under these conditions.