5-ethyl-3-phenylisoxazole | 19743-06-7

• 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: 5-ethyl-3-phenylisoxazole
• 英文别名: 3-Phenyl-5-ethylisoxazole；5-ethyl-3-phenyl-1,2-oxazole
• CAS: 19743-06-7
• 化学式: C₁₁H₁₁NO
• 分子量: 173.214
• InChiKey: FGGLDBPAPKPPOO-UHFFFAOYSA-N

物化性质

• 熔点：
  89-90 °C(Solv: ethanol (64-17-5))
• 沸点：
  120-121 °C(Press: 2-3 Torr)
• 密度：
  1.059±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  13
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.18
• 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：

  5-ethyl-3-phenylisoxazole 、 碘甲烷 在 2,2,6,6-tetramethylpiperidinyl-lithium 作用下， 以97%的产率得到5-Isopropyl-3-phenylisoxazole
  参考文献：
  名称：

  Regioselective synthesis and side-chain metallation and elaboration of 3-aryl-5-alkylisoxazoles

  摘要：

  A number of 3-aryl-5-alkylisoxazoles have been synthesized in high yields by reacting arylnitrile oxides with free enolate ions regioselectively obtained by metallation of various alkyl methyl ketones with LDA in THF at -78degreesC followed by dehydration. Investigations concerning regioselective side-chain metallation and elaboration of one of them (3-phenyl-5-ethylisoxazole) have also been carried out. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(02)00125-4
• 作为产物：
  描述：

  苯甲腈 N-氧化物 在 仲丁基锂 、 sodium carbonate 、 二异丙胺 作用下， 以 甲醇 、 环己烷 、 水 、 正戊烷 为溶剂， 反应 4.0h， 生成 5-ethyl-3-phenylisoxazole
  参考文献：
  名称：

  Regioselective synthesis and side-chain metallation and elaboration of 3-aryl-5-alkylisoxazoles

  摘要：

  A number of 3-aryl-5-alkylisoxazoles have been synthesized in high yields by reacting arylnitrile oxides with free enolate ions regioselectively obtained by metallation of various alkyl methyl ketones with LDA in THF at -78degreesC followed by dehydration. Investigations concerning regioselective side-chain metallation and elaboration of one of them (3-phenyl-5-ethylisoxazole) have also been carried out. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(02)00125-4

文献信息

• [EN] QUINOLONE COMPOUND<br/>[FR] COMPOSÉ QUINOLONE
  申请人：OTSUKA PHARMA CO LTD

  公开号：WO2013029548A1

  公开（公告）日：2013-03-07

  The present invention provides a compound represented by the formula (I) wherein X is a hydrogen atom or a fluorine atom; R is a hydrogen atom or alkyl; R1 is (1) cyclopropyl optionally substituted by to 3 halogen atoms or (2) phenyl optionally substituted by 1 to 3 halogen atoms; R2 is alkyl, alkoxy, haloalkoxy, a halogen atom, cyano, etc.; and R3 is 7-oxo-7,8-dihydro-1,8-naphthyridinyl, 3-pyridyl, etc., or a salt thereof. The compound of the present invention has excellent antimicrobial activity against Clostridium difficile and is useful for the prevention or treatment of intestinal infection such as Clostridium difficile- associated diarrhea.

  本发明提供了一种化合物，其表示为式(I)，其中X为氢原子或氟原子；R为氢原子或烷基；R1为（1）环丙基，可选择地被1至3个卤原子取代，或（2）苯基，可选择地被1至3个卤原子取代；R2为烷基、烷氧基、卤代烷氧基、卤原子、氰基等；R3为7-氧代-7,8-二氢-1,8-萘啶基，3-吡啶基等，或其盐。本发明的化合物对厌氧菌艰难梭菌具有优异的抗菌活性，并可用于预防或治疗肠道感染，如厌氧菌艰难梭菌相关性腹泻。
• One-pot regioselective synthesis of substituted pyrazoles and isoxazoles in PEG-400/water medium by Cu-free nano-Pd catalyzed sequential acyl Sonogashira coupling–intramolecular cyclization
  作者：Narasimha Swamy Thirukovela、Ramesh Balaboina、Vinayak Botla、Ravinder Vadde、Sreekantha Babu Jonnalagadda、Chandra Sekhar Vasam

  DOI：10.1039/c9cy01335k

  日期：——

  Catalyst efficacy of in situ generated Pd-nanoparticles (PdNPs) in the regioselective one-pot synthesis of 3,5-di & 3,4,5-trisubstituted pyrazoles and 3,5-disubstituted isoxazoles in environmentally benign PEG-400/H2O medium, which involves the sequential (i) Cu-free acyl-Sonogashira coupling (ASC) and (ii) intramolecular ynone–amine cyclization under PTC conditions was described. The results of controlled

  在环境友好的PEG-400 / H 2中原位生成的Pd-纳米颗粒（PdNPs）在区域选择性一锅合成3,5-di和3,4,5-三取代的吡唑和3,5-二取代的异恶唑的催化剂效力描述了一种O介质，它涉及（i）在PTC条件下无Cu的酰基-Sonogashira偶联（ASC）和（ii）分子内的ynone-amine环化。受控实验的结果支持两个连续的催化循环（ASC /环化）的操作，并通过一锅法通过与炔酮结合的钯实现互补/相反的区域选择性。而且，就地一锅法反应序列的第一个催化循环后回收的PdNPs已连续五次再次使用。此外，在进行上述研究之前，某些常见的Pd-N-杂环卡宾（Pd-NHC）配合物在水和有机物中催化相同的一锅两步反应顺序（无铜ASC /环化）的功效还优化了溶剂。还可以从水中的Pd-NHC上方原位生成PdNP，但由于它们的尺寸较大，因此无法重复使用。
• Preparation of 3,5-Disubstituted Pyrazoles and Isoxazoles from Terminal Alkynes, Aldehydes, Hydrazines, and Hydroxylamine
  作者：Ryo Harigae、Katsuhiko Moriyama、Hideo Togo

  DOI：10.1021/jo4027116

  日期：2014.3.7

  provided the corresponding 3,5-disubstituted pyrazoles or isoxazoles in good yields with high regioselectivity, through the formations of propargyl secondary alkoxides and α-alkynyl ketones. The present reactions are one-pot preparation of 3,5-disubstituted pyrazoles from terminal alkynes, aldehydes, molecular iodine, and hydrazines, and 3,5-disubstituted isoxazoles from terminal alkynes, aldehydes

  末端炔与正丁基锂的反应，然后与醛的反应，再用分子碘处理，然后肼或羟胺以高收率提供相应的3,5-二取代的吡唑或异恶唑，其高区域选择性通过形成炔丙基仲醇盐和α-炔基酮。本反应是从末端炔烃，醛，分子碘和肼一锅制备3，5-二取代吡唑，和从末端炔烃，醛，分子碘和羟胺一锅制备3，5-二取代异恶唑。
• Oxime-Mediated Facile Access to 5-Methylisoxazoles and Applications in the Synthesis of Valdecoxib and Oxacillin
  作者：Kui-Yong Dong、Hai-Tao Qin、Xing-Xing Bao、Feng Liu、Chen Zhu

  DOI：10.1021/ol502246t

  日期：2014.10.17

  A palladium-catalyzed efficient synthesis of 5-methylisoxazoles via oxime-mediated functionalization of unactivated olefins is described. The reaction affords a variety of 5-methylisoxazoles in moderate to good yields. To further demonstrate the utility of the method, the rapid synthesis of valdecoxib and oxacillin is reported.

  描述了通过肟介导的未活化烯烃的钯催化的5-甲基异恶唑的有效合成。该反应以中等至良好的产率提供了多种5-甲基异恶唑。为了进一步证明该方法的实用性，报道了伐地昔布和奥沙西林的快速合成。
• Complementary regioselective synthesis of 3,5-disubstituted isoxazoles from ynones
  作者：Xiaochen Liu、Dongsub Hong、Zhigang She、William H. Hersh、Barney Yoo、Yu Chen

  DOI：10.1016/j.tet.2018.09.043

  日期：2018.11

  dehydration. The two routes are not only both highly regioselective, but also complementary to each other as a pair of regioisomeric 3,5-disubstituted isoxazoles are readily prepared from one single ynone substrate. The efficiency of the two routes are further evaluated and demonstrated in the synthesis of three representative 3,5-disubstituted isoxazoles.

  报道了从炔酮向3，5-二取代异恶唑的两种区域选择性合成路线。一种途径是通过首先将炔酮转化为炔酮O-甲基肟，然后进行钯催化的分子内环化而发生的。另一个涉及通过炔酮和羟胺之间的环缩合形成5-羟基-4,5-二氢异恶唑，然后进行酸介导的脱水。这两种途径不仅具有高度的区域选择性，而且彼此互补，因为可以很容易地从一个单一的炔酮底物制备一对区域异构的3,5-二取代的异恶唑。进一步评估了这两种途径的效率，并在三种代表性的3,5-二取代的异恶唑的合成中得到了证明。