but-2-ynyl 2-bromoacetate | 144713-05-3

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: but-2-ynyl 2-bromoacetate
• 英文别名: 2-butynyl bromoacetate
• CAS: 144713-05-3
• 化学式: C₆H₇BrO₂
• 分子量: 191.024
• InChiKey: WFTMTFFKGCJTFO-UHFFFAOYSA-N

物化性质

• 沸点：
  222.8±20.0 °C(Predicted)
• 密度：
  1.497±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.5
• 重原子数：
  9
• 可旋转键数：
  3
• 环数：
  0.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  but-2-ynyl 2-bromoacetate 在 N,N′-双(对甲苯磺酰)肼 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 四氢呋喃 为溶剂， 反应 0.5h， 生成 2-Butynyl diazoacetate
  参考文献：
  名称：

  分子氧和重氮化合物对自由基的拦截：使用可见光催化直接合成草酸酯

  摘要：

  通过自由基方法而不是传统的离子反应的草酸酯的合成已经得到了很好的发展，其中可见光诱导的自由基在室温下被分子氧和重氮化合物捕获。该反应操作简单，温和，在α-溴代酮和重氮化合物中显示出广泛的底物范围。

  DOI：

  10.1021/acs.orglett.8b02487
• 作为产物：
  描述：

  2-丁炔-1-醇 、 溴乙酰溴 在 吡啶 作用下， 以 二氯甲烷 为溶剂， 反应 4.5h， 生成 but-2-ynyl 2-bromoacetate
  参考文献：
  名称：

  Oxone 促进 N-芳基甘氨酸衍生物的脱氢波瓦罗夫环化：一种处理喹啉稠合内酯和内酰胺的方法†

  摘要：

  已经探索了Oxone 促进了炔烃连接的N-芳基甘氨酸酯和酰胺的分子内脱氢亚氨基 Diels-Alder 反应（Povarov 环化），从而提供了具有生物学意义的喹啉稠合内酯和内酰胺。该反应简单、可扩展且产率高（高达 88%）。该方法进一步扩展到制备具有生物学重要意义的luotonin-A类似物和环沙霉素的喹啉核心。

  DOI：

  10.1039/c9ra06212b

文献信息

• In Situ Generation of Quinolinium Ylides from Diazo Compounds: Copper-Catalyzed Synthesis of Indolizine
  作者：Rongxiang Chen、Yanwei Zhao、Hongmei Sun、Ying Shao、Yudong Xu、Meihua Ma、Liang Ma、Xiaobing Wan

  DOI：10.1021/acs.joc.7b01042

  日期：2017.9.15

  The Cu-catalyzed three-component reaction between quinolines, diazo compounds, and alkenes has been established for direct construction of indolizine derivatives via quinolinium ylides. This methodology is distinguished by the use of a commercially inexpensive catalyst and readily available starting materials, wide substrate scope, and operational simplicity.

  已经建立了喹啉，重氮化合物和烯烃之间的Cu催化的三组分反应，用于通过喹啉鎓基团直接构建吲哚嗪衍生物。该方法的特点是使用了商业上便宜的催化剂和容易获得的起始原料，较宽的底物范围和操作简便性。
• Regio- and Stereoselective Copper(II)-Catalyzed Hydrosilylation of Activated Allenes in Water: Access to Vinylsilanes
  作者：Srinath Pashikanti、Joseph A. Calderone、Matthew K. Nguyen、Christopher D. Sibley、Webster L. Santos

  DOI：10.1021/acs.orglett.6b00981

  日期：2016.5.20

  By using catalytic amounts of copper(II), 4-picoline, and dimethylphenylsilylpinacol borane, a series of allenoates were silylated on the β carbon in good to excellent yields and high (E)-selectivity. The mild and efficient silylation method is conducted in water under atmospheric conditions to afford vinylsilanes.

  通过使用催化量的铜（II），4-甲基吡啶和二甲基苯基甲硅烷基萘烷硼烷，一系列的脲基甲酸酯以良好至极佳的收率和高（E）选择性被甲硅烷基化在β碳上。温和有效的甲硅烷基化方法是在水中在大气条件下进行的，以提供乙烯基硅烷。
• Microwave-Assisted Intramolecular [2 + 2] Allenic Cycloaddition Reaction for the Rapid Assembly of Bicyclo[4.2.0]octa-1,6-dienes and Bicyclo[5.2.0]nona-1,7-dienes
  作者：Kay M. Brummond、Daitao Chen

  DOI：10.1021/ol051115g

  日期：2005.8.1

  [2 + 2] cycloaddition reaction. This cycloaddition provides an efficient route to bicyclomethylenecyclobutenes. The reaction occurs with complete regioselectivity for the distal double bond of the allene for the selective formation of a variety of hetero- and carbocyclic substrates. Bicyclo[4.2.0]octadienes and bicyclo[5.2.0]nonadienes have been prepared in high yield. [reaction: see text]

  炔基丙二烯的微波辐射提供分子内[2 + 2]环加成反应。这种环加成反应提供了通往双环亚甲基环丁烯的有效途径。该反应对丙二烯的远端双键具有完全的区域选择性，从而选择性形成了各种杂环和碳环底物。高产率地制备了双环[4.2.0]辛二烯和双环[5.2.0]壬二烯。[反应：看文字]
• Rhodium(II)-catalyzed cyclization of 2-alkynyl 2-diazo-3-oxobutanoates as a method for synthesizing substituted furans
  作者：Albert Padwa、Frederick R. Kinder

  DOI：10.1021/jo00053a009

  日期：1993.1

  A series of 2-alkynyl 2-diazo-3-oxobutanoates, when treated with a catalytic quantity of rhodium(II) acetate, were found to produce furo[3,4-c]furans in good yield. The reaction proceeds by addition of a rhodium-stabilized carbenoid onto the acetylenic pi-bond to give a vinyl carbenoid which subsequently cyclizes onto the neighboring carbonyl group to produce the furan ring. In a similar manner, indeno[1,2-c]furans were produced from 2-butynyl 2-diazoarylacetates. Compounds substituted with methyl groups on the propargylic carbon atom cyclized at a slower rate. This rate diminution is attributed to the fact that the unsubstituted propargyl group can more easily achieve the required conformation for cyclization. C-H insertion was found to compete with furan formation when an alkyl group was attached to the keto functionality of the starting diazo acetoacetate. Diazo alkynyl sulfones undergo a novel oxygen transfer reaction when treated with rhodium(II) acetate at 80-degrees-C. The cyclized product is formed by sulfone oxygen attack onto the vinyl carbenoid producing a dipolar species which subsequently collapses to give the butenolide sulfoxide.