3-methyl-5-(2-phenylethyl)isoxazole | 27349-48-0

• 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: 3-methyl-5-(2-phenylethyl)isoxazole
• 英文别名: 3-methyl-5-phenethyl-isoxazole；3-Methyl-5-(2-phenylethyl)-1,2-oxazole
• CAS: 27349-48-0
• 化学式: C₁₂H₁₃NO
• 分子量: 187.241
• InChiKey: VHVBGVPOQDCKEN-UHFFFAOYSA-N

物化性质

• 沸点：
  281.2±9.0 °C(Predicted)
• 密度：
  1.068±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  3
• 重原子数：
  14
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.25
• 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：

  3-methyl-5-(2-phenylethyl)isoxazole 在 palladium on activated charcoal 氢气 、 potassium acetate 作用下， 以 乙醇 为溶剂， 反应 0.5h， 生成 3-methyl-1-phenyl-5-(2-phenylethyl)pyrazole
  参考文献：
  名称：

  Alberola, Angel; Andres, Celia; Ortega, Alfonso Gonzalez, Journal of Heterocyclic Chemistry, 1984, vol. 21, p. 1575 - 1576

  摘要：

  DOI：
• 作为产物：
  描述：

  3,5-二甲基异唑 在 正丁基锂 作用下， 以 四氢呋喃 为溶剂， 生成 3-methyl-5-(2-phenylethyl)isoxazole
  参考文献：
  名称：

  Isoxazoles as β-diketone synthons-selective anion formation on 3,5-dialkylisoxazoles

  摘要：

  DOI：

  10.1016/s0040-4039(01)81997-3

文献信息

• Lithiation of five-membered heteroaromatic compounds. The methyl substituted 1,2-azoles, oxadiazoles, and thiadiazoles
  作者：R. G. Micetich

  DOI：10.1139/v70-334

  日期：1970.7.1

  The lithiation of various methyl substituted isoxazoles, isothiazoles, pyrazoles, oxadiazoles, and thiadiazoles using n-butyllithium has been studied. Three types of reactions, namely, lateral lithiation, ring cleavage, and addition of butyllithium to the ring, have been found. 3,5-Dimethylisoxazole, 3-phenyl-5-methylisoxazole, 3,4-dimethyl-1,2,5-oxadiazole, 2,5-dimethyl-1,3,4-thiadiazole, 3-phenyl-5-methyl-1,2,4-oxadiazole, and 3,5-dimethyl-1,2,4-thiadiazole all undergo lateral lithiation to give the respective acetic acids after carboxylation. 1-Methyl-3,5-disubstituted pyrazoles form the 1-lithiomethyl derivatives, while 1-phenyl-3,5-disubstituted pyrazoles are converted to the 1-ortholithiophenyl-3,5-disubstituted pyrazoles. 4-Methylisothiazole is lithiated mainly at C-5, but also suffers ring cleavage to form 1-n-butylthio-2-cyanoprop-1-ene. Heteroaromatic compounds containing an N—S bond, such as 3,4-dimeth yl-1,2,5-thiadiazole, 4-methyl-5-phenyl-1,2,3-thiadiazole, and 3,5-dimethylisothiazole, undergo nucleophilic attack at sulfur with resulting ring cleavage. 3,5-Dimethylisothiazole produces 2-n-butylthiopent-2-en-4-one. 3-Methyl-5-phenyl-1,2,4-oxadiazole gave 3-methyl-5-phenyl-5-n-butyl-1,2,4-dihydroöxadiazole by addition to the azomethine bond. The results of these lithiations are discussed. 3-Methyl-5-lithiomethylisoxazole was converted to various derivatives. Nuclear magnetic resonance spectral analysis was used to establish the identity of the products.

  各种甲基取代异噁唑、异硫唑、吡唑、噁二唑和噻二唑的锂化反应已经被研究。发现了三种类型的反应，即侧链锂化、环裂解和丁基锂加入环中。3,5-二甲基异噁唑、3-苯基-5-甲基异噁唑、3,4-二甲基-1,2,5-噁二唑、2,5-二甲基-1,3,4-噻二唑、3-苯基-5-甲基-1,2,4-噁二唑和3,5-二甲基-1,2,4-噻二唑都经历侧链锂化，在羧化后生成相应的乙酸。1-甲基-3,5-二取代吡唑形成1-锂甲基衍生物，而1-苯基-3,5-二取代吡唑转化为1-邻锂苯基-3,5-二取代吡唑。4-甲基异硫唑主要在C-5处发生锂化，但也发生环裂解形成1-正丁硫基-2-氰基丙-1-烯。含有N—S键的杂环化合物，如3,4-二甲基-1,2,5-噻二唑、4-甲基-5-苯基-1,2,3-噻二唑和3,5-二甲基异硫唑，在硫原子上发生亲核攻击，导致环裂解。3,5-二甲基异硫唑产生2-正丁硫代戊-2-烯-4-酮。3-甲基-5-苯基-1,2,4-噁二唑通过加成到偶氮亚胺键生成3-甲基-5-苯基-5-正丁基-1,2,4-二氢噁二唑。讨论了这些锂化的结果。3-甲基-5-锂甲基异噁唑被转化为各种衍生物。核磁共振光谱分析用于确定产物的身份。
• Reactions of 5-substituted 3-alkyl- and 3-aryl-isoxazoles with tetrasulfur tetranitride antimony pentachloride complex (S4N4·SbCl5): complete regioselective formation of 4-substituted 3-acyl- and 3-aroyl-1,2,5-thiadiazoles and their mechanism of formation
  作者：Kil-Joong Kim、Kyongtae Kim

  DOI：10.1039/a802408a

  日期：——

  The reactions of 3-alkyl- 5a–f, 3-aryl- 5g–m, 3-acylamido- 5n,p, 3-benzamido- 5o and 3-arylamino- 5q -5-alkyl- and -5-aryl-isoxazoles with tetrasulfur tetranitride antimony pentachloride complex (S4N4·SbCl5) in toluene at 90 °C to reflux temperature give 3-acyl- 6a–c, e, n–q and 3-aroyl-4-substituted-1,2,5-thiadiazoles 6d, f–m in 13 to 61% yields as single isomers. The same reactions of 3,4-dimethyl-

  3-烷基-5a-f，3-芳基-5g-m，3-酰基酰胺基-5n，p，3-苯甲酰胺基-5o和3-芳基氨基-5q -5-烷基-和-5-芳基-异恶唑的反应四氮化四锑五氯化锑（S 4 N 4 ·SbCl 5）在90°C的甲苯中至回流温度，得到13-61％的3-酰基-6a-c，e，n-q和3-芳酰基-4-取代的1,2,5-噻二唑6d，f-m产生为单一异构体。3,4-二甲基-5s，5v，4-乙基-3-甲基-5t -5-烷基-和/或5-芳基-异恶唑在相同条件下的相同反应得到3-（1-乙酰基-1-氯乙基）-8a，3-（1-苯甲酰基-1-氯丙基）-8b，3-（1-苯甲酰基-1-氯乙基）-8d或3-（1-苯甲酰基-1-氯乙基）-4-甲基- 1,2,5-噻二唑8c是一种新型的1,2,5-噻二唑衍生物。另外，在相同条件下，与具有供电子取代基例如甲基，4-甲基苯基和4-甲氧基苯基的5-芳基-4-溴异恶唑（5，w，y，z）在相同条件下反应，得到3-芳酰基。
• Atom-Economic Synthesis of Fully Substituted 2-Aminopyrroles via Gold-Catalyzed Formal [3+2] Cycloaddition between Ynamides and Isoxazoles
  作者：Xin-Yu Xiao、Ai-Hua Zhou、Chao Shu、Fei Pan、Ting Li、Long-Wu Ye

  DOI：10.1002/asia.201500447

  日期：2015.9

  concise and flexible synthesis of fully substituted 2‐aminopyrroles via gold‐catalyzed formal [3+2] cycloaddition between ynamides and isoxazoles has been developed. Under mild reaction conditions, various 2‐aminopyrrole derivatives were obtained in good to excellent yields, thus providing an efficient and atom‐economic way for the construction of fully substituted 2‐aminopyrroles.

  已经开发了通过金酰胺和异恶唑之间的金催化的正式[3 + 2]环加成反应，简洁，灵活地合成完全取代的2-氨基吡咯的方法。在温和的反应条件下，获得了各种2-氨基吡咯衍生物，收率好至极好，从而为构建完全取代的2-氨基吡咯提供了一种有效且原子经济的方法。
• Asymmetric Hydrogenation of Isoxazolium Triflates with a Chiral Iridium Catalyst
  作者：Ryuhei Ikeda、Ryoichi Kuwano

  DOI：10.1002/chem.201600732

  日期：2016.6.13

  enantiomeric ratio (e.r.). Chiral cis‐isoxazolidines were obtained in up to 89:11 e.r., with no formation of their trans isomers, when the substrates had a primary alkyl substituent at the 5‐position. The mechanistic studies indicate that the hydridoiridium(III) species prefers to deliver its hydride to the C5 atom of the isoxazole ring. The hydride attack leads to the formation of the chiral isoxazolidine via

  在H 2存在下，铱催化剂[IrCl（cod）] 2-膦-I 2（cod = 1,5-环辛二烯）选择性地将三氟甲磺酸异恶唑鎓还原为异恶唑啉或异恶唑烷。当使用旋光性膦-恶唑啉配体时，铱催化的氢化反应以高至良好的对映选择性进行。将3-取代的5-芳基异恶唑鎓盐转化为4-异恶唑啉，对映体比例高达95：5（er）。手性顺式-异唑烷类化合物的最高获得时间为89:11，没有形成反式异构体，当底物在5位上具有伯烷基取代基时。机理研究表明，氢化铱（III）物种倾向于将其氢化物传递到异恶唑环的C5原子上。氢化物侵蚀导致3-异恶唑啉中间体形成手性异恶唑烷。同时，在4-异恶唑啉的选择性形成中，5-芳基取代基的空间位阻可能会阻碍C5原子处的氢化物攻击。
• Kashima,C. et al., Heterocycles, 1977, vol. 7, p. 241 - 246
  作者：Kashima,C. et al.

  DOI：——

  日期：——