2-benzyl-3-oxo-butyric acid methyl ester | 3666-82-8

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 酮酸及其衍生物
• 英文名称: 2-benzyl-3-oxo-butyric acid methyl ester
• 英文别名: methyl 2-benzyl-3-oxobutanoate
• CAS: 3666-82-8
• 化学式: C₁₂H₁₄O₃
• 分子量: 206.241
• InChiKey: WYOAKCUFYGFYGW-UHFFFAOYSA-N

物化性质

• 沸点：
  145 °C(Press: 8 Torr)
• 密度：
  1.0980 g/cm3

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  15
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

安全信息

• 海关编码：
  2918300090

反应信息

• 作为反应物：
  描述：

  2-benzyl-3-oxo-butyric acid methyl ester 在 三氟甲磺酸 、 三氟乙酸 作用下， 以 二氯甲烷 为溶剂， 反应 8.0h， 以85%的产率得到3-甲基茚-2-羧酸
  参考文献：
  名称：

  Cyclization of Arylacetoacetates to Indene and Dihydronaphthalene Derivatives in Strong Acids. Evidence for Involvement of Further Protonation of O,O-Diprotonated β-Ketoester, Leading to Enhancement of Cyclization

  摘要：

  The chemical features, such as substrate stability, product distribution, and substrate generality, and the reaction mechanism of Bronsted superacid-catalyzed cyclization reactions of aromatic ring-containing acetoacetates (beta-ketoesters) were examined in detail. While two types of carbonyl cyclization are possible, i.e., keto cyclization and ester cyclization, the former was found to take place exclusively. The reaction constitutes an efficient method to synthesize indene and 3,4-dihydronapthalene derivatives. Acid-base titration monitored with C-13 NMR spectroscopy showed that the acetoacetates are fully O-1,O-3-diprotonated at H-0 = -11. While the five-membered ring cyclization of the arylacetoacetates proceeded slowly at H-0 = -11, a linear increase in the rate of the cyclization was found with increasing acidity in the high acidity region of H-0 = -11.8 to -13.3. Therefore, the O-1,O-3-diprotonated acetoacetates exhibited some cyclizing reactivity, but they are not the reactive intermediates responsible for the acceleration of the cyclization in the high acidity region. The reactive cationic species might be formed by further protonation (or protosolvation) of the O-1,O-3-diprotonated acetoacetates; i.e., they may be tricationic species. Thermochemical data on the acid-catalyzed cyclization of the arylacetoacetates showed that the activation energy is decreased significantly as compared with that of the related acid-catalyzed cyclization reaction of a compound bearing a single functional group, such as a ketone. These findings indicate that intervention of the trication contributes to the activation of the cyclization of arylacetoacetates in strong acid, and the electron-withdrawing nature of the O-protonated ester functionality significantly increases the electrophilicity of the ketone moiety.

  DOI：

  10.1021/ja908749u
• 作为产物：
  描述：

  甲基(2Z)-2-亚苄基-3-氧代丁酸酯 在 溶剂黄146 、 锌 作用下， 以 乙醇 、 苯 为溶剂， 反应 0.03h， 以7.93 g的产率得到2-benzyl-3-oxo-butyric acid methyl ester
  参考文献：
  名称：

  Zn-AcOH体系的还原性Knoevenagel冷凝

  摘要：

  摘要 从可商购的醛和活性亚甲基化合物开始，开发了一种有效的克级一锅法制备2-取代的丙二酸酯和相关结构。该技术结合了Knoevenagel缩合与Zn-AcOH系统中所得活化烯烃中C = C键的还原。发生C ＝ C键还原的相对容易性可以追溯到中间亚芳基丙二酸酯中取代基的接受能力。 出版历史 收到：2020年5月21日 修订后接受：2020年9月16日 发布日期： 2020年10月29日（在线） ©2020年。Thieme。版权所有 Georg Thieme Verlag KGRüdigerstraße14，70469斯图加特，德国

  DOI：

  10.1055/s-0040-1705940

文献信息

• A Facile One-Pot Benzylation of Sodium Enolates Using Trifluoromethanesulfonic Anhydride and Diphenyl Sulfoxide
  作者：Tomofumi Takuwa、Tomofumi Minowa、Hidehiko Fujisawa、Teruaki Mukaiyama

  DOI：10.1248/cpb.53.476

  日期：——

  C-benzylation of various sodium enolates derived from methyl malonate, beta-ketoesters, a beta-cyanoester, a beta-cyanosulfone, ketones and a carboxylic ester is reported. Reaction of alkoxydiphenylsulfonium salts formed by treating various benzyl alcohols with diphenyl sulfide bis(trifluoromethanesulfonate) (derived from trifluoromethanesulfonic anhydride and diphenyl sulfoxide) proceeded smoothly, and

  报道了衍生自丙二酸甲酯，β-酮酸酯，β-氰基酯，β-氰基砜，酮和羧酸酯的各种烯醇钠的简单的一锅C-苄基化。通过用二苯硫醚双（三氟甲磺酸盐）（衍生自三氟甲磺酸酐和二苯亚砜）处理各种苄醇而形成的烷氧基二苯s盐的反应进行得很顺利，并且以高至高收率获得了相应的C-苄基化产物。
• H5CoW12O40 supported on nano silica from rice husk ash: A green bifunctional catalyst for the reaction of alcohols with cyclic and acyclic 1,3-dicarbonyl compounds
  作者：Ezzat Rafiee、Maryam Khodayari、Masoud Kahrizi、Reza Tayebee

  DOI：10.1016/j.molcata.2012.03.005

  日期：2012.6

  abundant agricultural by-product. The present research work deals with the production of nano silica powders, with high surface area and in amorphous form, from RHA using optimized technique. 12-Tungestocobaltic acid, H5CoW12O40 (CoW), was supported on silica from RHA to produce silica supported CoW (CoW/NSiO2) as a nano catalyst. The characterization data derived from FT-IR reveal that the Keggin structure

  稻壳灰（RHA）是一种丰富的农业副产品。本研究工作涉及使用优化技术从RHA生产高表面积和无定形形式的纳米二氧化硅粉末。由RHA将12-钨钴酸H 5 CoW 12 O 40（CoW）负载在二氧化硅上，以制备作为纳米催化剂的二氧化硅负载的CoW（CoW / NSiO 2）。从FT-IR得出的表征数据表明，CoW的Keggin结构在CoW / NSiO 2中保持完整。TEM图像显示该催化剂为球形，平均粒径为10nm。催化剂的酸度通过电位滴定法用n-丁胺。令我们惊讶的是，这种非常强固的固体酸催化剂显示出极好的酸位分布，这表明该催化剂与负载在商业二氧化硅上的CoW（CoW / SiO 2），CoW和K 5 CoW 12相比，具有更高的表面活性位。O 40。发现在CoW / NSiO 2上具有高催化活性。最后，CoW / NSiO 2用作将线性1,3-二羰基化合物与苄醇进行苄基化反应和由环状1,3-二
• A Facile One-pot Benzylation of Sodium Enolates Using Trifluoromethansulfonic Anhydride and Diphenyl Sulfoxide
  作者：Tomofumi Takuwa、Jim Yoshitaka Onishi、Jun-ichi Matsuo、Teruaki Mukaiyama

  DOI：10.1246/cl.2004.8

  日期：2004.1

  A facile one-pot C-benzylation of various sodium enolates derived from methyl malonate, beta-ketoesters, a beta-cyanoester, a beta-cyanosulfone, ketones and a carboxylic ester is reported. Reaction of alkoxydiphenylsulfonium salts formed by treating various benzyl alcohols with diphenyl sulfide bis(trifluoromethanesulfonate) (derived from trifluoromethanesulfonic anhydride and diphenyl sulfoxide) proceeded

  报道了衍生自丙二酸甲酯、β-酮酯、β-氰基酯、β-氰基砜、酮和羧酸酯的各种烯醇钠的简便的一锅 C-苄基化。各种苄醇与二苯硫醚双（三氟甲磺酸盐）（衍生自三氟甲磺酸酐和二苯亚砜）反应生成的烷氧基二苯锍盐反应顺利进行，得到相应的C-苄基化产物，收率良好至高。
• 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。
• Asymmetric α-Photoalkylation of β-Ketocarbonyls by Primary Amine Catalysis: Facile Access to Acyclic All-Carbon Quaternary Stereocenters
  作者：Yunbo Zhu、Long Zhang、Sanzhong Luo

  DOI：10.1021/ja508605a

  日期：2014.10.22

  We describe the direct construction of all-carbon quaternary stereocenters via α-photoalkylation of β-ketocarbonyls with high efficacy and enantioselectivities by merging photoredox catalysis and primary amine catalysis. The open-shell photoradical approach enables asymmetric α-alkylations that are difficult under thermal conditions.

  我们描述了通过合并光氧化还原催化和伯胺催化，通过具有高效和对映选择性的 β-酮羰基的 α-光烷基化直接构建全碳四元立体中心。开壳光自由基方法能够实现在热条件下难以实现的不对称 α-烷基化。