ethyl 5-phenyl-2-(p-tolyl)oxazole-4-carboxylate | 934610-13-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: ethyl 5-phenyl-2-(p-tolyl)oxazole-4-carboxylate
• 英文别名: Ethyl 2-(4-methylphenyl)-5-phenyl-1,3-oxazole-4-carboxylate；ethyl 2-(4-methylphenyl)-5-phenyl-1,3-oxazole-4-carboxylate
• CAS: 934610-13-6
• 化学式: C₁₉H₁₇NO₃
• 分子量: 307.349
• InChiKey: RFVOOLZXRREPLY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.6
• 重原子数：
  23
• 可旋转键数：
  5
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.16
• 拓扑面积：
  52.3
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  1-{[19-氨基-7-(2-氨基-2-羰基乙基)-10-(3-氨基-3-羰基丙基)-16-(4-乙基苯甲基)-13-(1-甲基丙基)-6,9,12,15,18-五羰基-1,2-二硫杂-5,8,11,14,17-五氮杂环二十碳烷-4-基]羰基}脯氨酰亮氨酰甘氨酸酰胺 、 2-对甲苯噁唑-4-羧酸乙酯 在 氧气 、 palladium diacetate 、 potassium carbonate 、 双(2-二苯基磷苯基)醚 作用下， 以 1,4-二氧六环 为溶剂， 反应 20.0h， 以75%的产率得到ethyl 5-phenyl-2-(p-tolyl)oxazole-4-carboxylate
  参考文献：
  名称：

  Pd-catalyzed desulfitative arylation for the synthesis of 2,5-diarylated oxazole-4-carboxylates using dioxygen as the terminal oxidant

  摘要：

  一种新颖的钯催化方法已被证明可用于利用亚砜酸钠作为芳基来源构建2,5-二芳基氧唑-4-羧酸酯。

  DOI：

  10.1039/c7ob01912b

文献信息

• Regioselective synthesis of oxazole derivatives via palladium-catalyzed and copper-mediated cascade oxidative cyclization
  作者：Jia Zheng、Min Zhang、Liangbin Huang、Xiaohan Hu、Wanqing Wu、Huawen Huang、Huangfeng Jiang

  DOI：10.1039/c3cc49788g

  日期：——

  A novel Pd-catalyzed/Cu-mediated oxidative cyclization has been developed for the synthesis of trisubstituted oxazoles, which is thought to proceed through cascade formation of C-N and C-O bonds. In this protocol, four hydrogen atoms were removed and water was used as the oxygen atom source.

  已开发出新颖的Pd催化/ Cu介导的氧化环化反应来合成三取代的恶唑，据认为该过程可通过CN和CO键的级联形成来进行。在该协议中，除去了四个氢原子，并将水用作氧原子源。
• Three‐Component [2+2+1] Gold(I)‐Catalyzed Oxidative Generation of Fully Substituted 1,3‐Oxazoles Involving Internal Alkynes
  作者：Alexey Yu. Dubovtsev、Dmitry V. Dar'in、Vadim Yu. Kukushkin

  DOI：10.1002/adsc.201900097

  日期：2019.6.18

  Three‐component [2+2+1] gold(I)‐catalyzed reaction of internal alkynes (alkynyl esters or ‐ketones), nitriles, and 2‐chloropyridine N‐oxide led to a wide range of fully substituted 1,3‐oxazoles (32 examples; up to 92% isolated yields). Nitrile R3CN species, employed in the reaction as both reactants and solvents, comprise conventional nitriles (R3=Alk, Ar) and also push‐pull systems such as cyanamides

  三组分[2 + 2 + 1]金（I）催化内部炔烃（炔基酯或酮），腈和2-氯吡啶N-氧化物的反应，导致了各种各样的完全取代的1,3-恶唑（32个示例；高达92％的孤立产率）。反应中既用作反应物又作为溶剂的腈R 3 CN物种包括常规腈（R 3 = Alk，Ar）以及推挽式体系，如氰胺（R 3 = NH 2和NAlk 2）和硫氰酸酯（ R 3＝ SPr）。所开发方法的优点包括反应条件温和，官能团耐受性高，取代基R 1 / R 3范围广当R 1＝ NH 2时，还有可能容易修饰COR 2或氨基。
• NIS-TBHP promoted oxidative coupling of C N and C O bonds: A metal-free approach to polysubstituted oxazoles
  作者：Shengxiang Yang、Yuzhu Yang、Fei Li、Xiaolan Liu

  DOI：10.1016/j.tetlet.2020.151846

  日期：2020.5

  A metal-free approach to polysubstituted oxazoles via the oxidative coupling of readily available benzylamines and 1,3-dicarbonyl derivatives in the presence of an external base has been developed. A variety of functional groups on both of the starting materials are tolerated using this method, affording the corresponding oxazoles in moderate to good yields. Iodination was proposed as the initiation

  已经开发了一种在外部碱存在下通过容易获得的苄胺和1,3-二羰基衍生物的氧化偶合而形成多取代恶唑的无金属方法。使用这种方法可以耐受两种起始原料上的各种官能团，从而以中等至良好的产率提供相应的恶唑。碘化被提出作为反应的起始步骤，并且提出了一个合理的机理来解释反应途径。
• Pd-catalyzed desulfitative arylation for the synthesis of 2,5-diarylated oxazole-4-carboxylates using dioxygen as the terminal oxidant
  作者：Xiaodong Tang、Kai Yang、Liying Zeng、Qiang Liu、Huoji Chen

  DOI：10.1039/c7ob01912b

  日期：——

  A novel palladium-catalyzed approach for constructing 2,5-diarylated oxazole-4-carboxylates using sodium arylsulfinates as the aryl source has been demonstrated.

  一种新颖的钯催化方法已被证明可用于利用亚砜酸钠作为芳基来源构建2,5-二芳基氧唑-4-羧酸酯。