(E)-2-styrylbenzoxazole | 59066-62-5

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并恶唑类
• 英文名称: (E)-2-styrylbenzoxazole
• 英文别名: (E)-2-styrylbenzo[d]oxazole；2-styrylbenzoxazole；(E) 2-(2-phenylethenyl)benzoxazole；2-[(E)-2-phenylethenyl]-1,3-benzoxazole
• CAS: 59066-62-5
• 化学式: C₁₅H₁₁NO
• 分子量: 221.258
• InChiKey: GJFNNZBYCMUAHY-ZHACJKMWSA-N

物化性质

• 熔点：
  79-80 °C
• 沸点：
  386.1±35.0 °C(Predicted)
• 密度：
  1.210±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  17
• 可旋转键数：
  2
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.0
• 拓扑面积：
  26
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  (E)-2-styrylbenzoxazole 在 盐酸 作用下， 以 甲醇 为溶剂， 生成 2,3-dideoxy-α-D-erythro-hex-2-enopyranosyl cyanide
  参考文献：
  名称：

  A mild and simple enzymic conversion of aldono- and aldurononitriles into the corresponding amides and/or carboxylic acids

  摘要：

  DOI：

  10.1021/jo00063a048
• 作为产物：
  描述：

  2-甲基苯并唑 在 sodium hydride 、 lithium diisopropyl amide 作用下， 以 四氢呋喃 为溶剂， 反应 9.42h， 生成 (E)-2-styrylbenzoxazole
  参考文献：
  名称：

  Copper(I) salt-mediated arylation of phosphinyl-stabilized carbanions and synthetic application to heterocyclic compounds

  摘要：

  The copper-mediated reaction of phosphinyl-stabilized carbanions 2a-c with aryl halides 1a-i in DMF or HMPA produced (arylmethyl)phosphonates 3-11 in good yields. Similar treatment of N-(2-iodophenyl)- and N-(2-iodophenyl)-N-methyl-alpha-(diethoxyphosphinyl)acetamides (12 and 14) led to 2-[(diethoxyphosphinyl)methyl]benzoxazole (13) and 1-methyl-3-(diethoxyphosphinyl)oxindole (15) in 71 and 85% yields, respectively. 4-(Ethoxycarbonyl)-3,4-dihydroisoquinoline N-oxide (33) was synthesized by the reaction of ethyl alpha-(o-formylphenyl)acrylate (31), derived from 6 and paraformaldehyde,with hydroxylamine. The cycloaddition of 33 to olefins such as dimethyl maleate, methyl acrylate, and styrene was studied.

  DOI：

  10.1021/jo00077a018

文献信息

• CHELATE NANOEMULSION FOR MRI
  申请人：Port Marc

  公开号：US20130309176A1

  公开（公告）日：2013-11-21

  The present invention relates to an oil-in-water nanoemulsion composition for MRI, comprising: an aqueous phase, representing 70% to 90% by weight of the composition, advantageously 75% to 85% and more advantageously from 78% to 82% a lipid phase comprising an oil, representing 9.5% to 29.5% by weight of the composition, advantageously 14% to 25% and more advantageously 17% to 21%, a surfactant at the interface between the aqueous and lipid phases, the surfactant comprising at least one amphiphilic paramagnetic metal chelate and optionally an amphiphilic lipid; the total content of surfactant by weight relative to the oil being between 4% and 10% and advantageously between 5% and 8%; the total content of surfactant by weight relative to the composition being between 0.35% and 2.95% and advantageously between 0.5% and 2%; the oil comprising at least 70%, advantageously at least 80%, advantageously at least 95% by weight and especially at least 97% of saturated C6-C18, advantageously C6-C14 and more advantageously C6-C10 fatty acids.

  本发明涉及一种用于磁共振成像的油包水纳米乳液组合物，包括： 水相，表示组合物重量的70%至90%，优选75%至85%，更优选78%至82%； 脂相包括一种油，表示组合物重量的9.5%至29.5%，优选14%至25%，更优选17%至21%； 表面活性剂位于水相和脂相之间的界面上，表面活性剂包括至少一种两性磁性金属螯合物和可选的两性脂质； 相对于油的重量，表面活性剂的总含量在4%至10%之间，优选在5%至8%之间； 相对于组合物的重量，表面活性剂的总含量在0.35%至2.95%之间，优选在0.5%至2%之间； 油包括至少70%，优选至少80%，优选至少95%的饱和C6-C18，优选C6-C14，更优选C6-C10脂肪酸。
• Bimetallic Cooperative Catalysis for Decarbonylative Heteroarylation of Carboxylic Acids via C‐O/C‐H Coupling
  作者：Chengwei Liu、Chong‐Lei Ji、Tongliang Zhou、Xin Hong、Michal Szostak

  DOI：10.1002/anie.202100949

  日期：2021.5.3

  Cooperative bimetallic catalysis is a fundamental approach in modern synthetic chemistry. We report bimetallic cooperative catalysis for the direct decarbonylative heteroarylation of ubiquitous carboxylic acids via acyl C‐O/C‐H coupling. This novel catalytic system exploits the cooperative action of a copper catalyst and a palladium catalyst in decarbonylation, which enables highly chemoselective synthesis

  协同双金属催化是现代合成化学的基本方法。我们报告了通过酰基 C-O/C-H 偶联对普遍存在的羧酸进行直接脱羰杂芳基化的双金属协同催化。这种新型催化体系利用铜催化剂和钯催化剂在脱羰基化中的协同作用，在没有预官能化或导向基团的情况下，通过羧酸与杂芳烃的偶联，能够高度化学选择性地合成重要的杂二芳基基序。这种协同脱羰方法使用常见的羧酸，并显示出非常广泛的底物范围（> 70 个示例），包括药物的后期修饰和生物活性剂的简化合成。进行了广泛的机理和计算研究，以深入了解反应的机理。关键步骤涉及通过铜-芳基物质与氧化加成/脱羰产生的钯（II）中间体的金属转移来交叉两个催化循环。
• Cesium Fluoride and Copper‐Catalyzed One‐Pot Synthesis of Benzoxazoles <i>via</i> a Site‐Selective Amide C−N Bond Cleavage
  作者：Zhongfeng Luo、Hongxiang Wu、Yue Li、Yuwen Chen、Jingyi Nie、Siqi Lu、Yulin Zhu、Zhuo Zeng

  DOI：10.1002/adsc.201900485

  日期：2019.9.3

  We report herein a two‐step one‐pot strategy for the synthesis of benzoxazoles from amides by using cesium fluoride/copper as catalysts. This approach involves the in situ generation of acyl fluorides from the corresponding amides, and the acyl fluorides undergo transamidation and cyclization to give benzoxazoles in good yields. In this work, the amide C−N bonds are activated by CsF to form the acyl

  我们在此报告一种通过使用氟化铯/铜作为催化剂由酰胺合成苯并恶唑的两步一锅策略。该方法涉及从相应的酰胺中原位生成酰基氟，并且该酰基氟经过转酰胺基化和环化以良好的收率得到苯并恶唑。在这项工作中，酰胺C-N键被CsF活化形成酰基氟中间体，该中间体进一步与邻溴代苯胺反应以有效生成苯并恶唑。值得注意的是，该方法论证了广泛的底物范围，因为伯/仲苯甲酰胺具有很好的耐受性，并且该过程可能有助于酰胺一锅转化的发展。
• Metal‐Free Synthesis of Alkenylazaarenes and 2‐Aminoquinolines through Base‐Mediated Aerobic Oxidative Dehydrogenation of Benzyl Alcohols
  作者：Dipak J. Dahatonde、Aritra Ghosh、Sanjay Batra

  DOI：10.1002/ejoc.202100420

  日期：2021.5.20

  A metal‐free, base‐mediated oxidative dehydrogenative coupling of substituted phenylmethanols (benzyl alcohols) with methyl azaarenes or phenylacetonitriles to afford substituted alkenylazaarenes or 2‐aminoquinolines, respectively is presented.

  提出了取代苯甲醇（苄醇）与甲基氮杂芳烃或苯乙腈的无金属，碱介导的氧化脱氢偶联反应，分别提供了取代的烯基氮杂芳烃或2-氨基喹啉。
• Deaminative Olefination of Methyl <i>N</i>-Heteroarenes by an Amine Oxidase Inspired Catalyst
  作者：Pradip Ramdas Thorve、Biplab Maji

  DOI：10.1021/acs.orglett.0c04060

  日期：2021.1.15

  We explored the bioinspired o-quinone cofactor catalyzed aerobic primary amine dehydrogenation for a cascade olefination reaction with nine different methyl N-heteroarenes, including pyrimidines, pyrazines, pyridines, quinolines, quinoxolines, benzimidazoles, benzoxazoles, benzthiazoles, and triazines. An o-quinone catalyst phd (1,10-phenanthroline-5,6-dione) combined with a Brønsted acid catalyzed

  我们探索了仿生邻醌辅因子催化的有氧伯胺脱氢与九种不同的甲基N-杂芳烃的级联烯化反应，包括嘧啶、吡嗪、吡啶、喹啉、喹啉、苯并咪唑、苯并恶唑、苯并噻唑。一个ø与布朗斯台德酸组合的-quinone催化剂博士（1,10-菲咯啉-5,6-二酮）催化的反应。N-杂芳基芪类化合物在温和条件下以高产率和 ( E )-选择性合成，使用氧气 (1 atm) 作为唯一氧化剂，无需过渡金属盐、配体、化学计量碱或氧化剂。