4-phenethyl-2-phenyloxazol-5(4H)-one | 106942-34-1

• 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: 4-phenethyl-2-phenyloxazol-5(4H)-one
• 英文别名: 2-phenyl-4-(2-phenylethyl)-4H-1,3-oxazol-5-one
• CAS: 106942-34-1
• 化学式: C₁₇H₁₅NO₂
• 分子量: 265.312
• InChiKey: HVLQDLAOAIMZBW-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.8
• 重原子数：
  20
• 可旋转键数：
  4
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.18
• 拓扑面积：
  38.7
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  4-phenethyl-2-phenyloxazol-5(4H)-one 在 草酸 作用下， 反应 0.25h， 生成
  参考文献：
  名称：

  氟化α-氨基酮的合成第一部分：α-苯甲酰胺基烷基二氟和三氟甲基酮

  摘要：

  由α-氨基酸制得的2-苯基-5（4H）-恶唑酮通过改良的Dakin-West方法与二氟和三氟乙酸酐反应，以一锅法反应生成α-苯甲酰胺基烷基二氟和三氟甲基酮收率高。单氟甲基类似物也由α-氨基酸制备，但是避免了使用剧毒的氟乙酸酐。关键步骤是在相应的溴甲基酮上进行卤素交换反应。

  DOI：

  10.1016/s0040-4039(00)84319-1
• 作为产物：
  描述：

  (S)-2-benzoylamino-4-phenylbutyric acid 在 溶剂黄146 作用下， 以 二氯甲烷 为溶剂， 以76%的产率得到4-phenethyl-2-phenyloxazol-5(4H)-one
  参考文献：
  名称：

  Peptide-Catalyzed Conversion of Racemic Oxazol-5(4H)-ones into Enantiomerically Enriched α-Amino Acid Derivatives

  摘要：

  We report the development and optimization of a tetrapeptide that catalyzes the methanolytic dynamic kinetic resolution of oxazol-5(4H)-ones (azlactones) with high levels of enantioinduction. Oxazolones possessing benzylic-type substituents were found to perform better than others, providing methyl ester products in 88:12 to 98:2 er. The mechanism of this peptide-catalyzed process was investigated through truncation studies and competition experiments. High-field NOESY analysis was performed to elucidate the solution-phase structure of the peptide, and we present a plausible model for catalysis.

  DOI：

  10.1021/jo402828f

文献信息

• Organocatalytic dynamic kinetic resolution of azlactones to construct chiral N-acyl amino acid oxime esters
  作者：Kunru Yu、Xiaohua Liu、Xiaobin Lin、Lili Lin、Xiaoming Feng

  DOI：10.1039/c5cc05534b

  日期：——

  We have developed a chiral bisguanidinium salt catalyzed dynamic kinetic resolution of azlactones with oximes. A variety of chiral N-acyl amino acid oxime esters were generated with up to 97% ee and 99% yield. The products are useful in peptide synthesis.

  我们已经开发了一种手性双胍盐催化肟与a内酯的动力学动力学拆分。产生了多种手性N-酰基氨基酸肟酯，其收率高达97％ee，收率高达99％。该产品可用于肽合成。
• [8+2] Formal Cycloaddition Reactions of Tropones with Azlactones under Brønsted Acid Catalysis and Synthesis of α-(2-Tropyl), α-Alkyl α-Amino Acids
  作者：Francisco Esteban、Ricardo Alfaro、Francisco Yuste、Alejandro Parra、José Luis García Ruano、José Alemán

  DOI：10.1002/ejoc.201301774

  日期：2014.3

  The reaction of tropones with azlactones catalyzed by Bronsted acids affords a variety of dihydro-2H-cyclohepta[b]furan derivatives, corresponding to a formal [8+2] cycloaddition process. They can easily be opened by nucleophiles to afford a new type of α,α-disubstituted α-amino acid (or peptide) containing seven-membered rings at the quaternary position.

  由布朗斯台德酸催化的托酮与吖内酯的反应提供了多种二氢-2H-环庚 [b] 呋喃衍生物，对应于正式的 [8+2] 环加成过程。它们可以很容易地被亲核试剂打开，以提供一种新型的 α,α-二取代 α-氨基酸（或肽），在四元位置含有七元环。
• Asymmetric construction of dihydrobenzofuran-2,5-dione derivatives <i>via</i> desymmetrization of <i>p</i>-quinols with azlactones
  作者：Lihua Xie、Shunxi Dong、Qian Zhang、Xiaoming Feng、Xiaohua Liu

  DOI：10.1039/c8cc08985j

  日期：——

  3-Amino-benzofuran-2,5-diones containing a chiral amino acid residue were achieved through BG-1·HBPh₄ catalyzed enantioselective Michael addition/lactonization cascade reaction of p-quinols with azlactones.

  通过 BG-1-HBPh4 催化对醌与氮内酯的对映选择性迈克尔加成/内酯化级联反应，获得了含有手性氨基酸残基的 3-氨基苯并呋喃-2,5-二酮。
• Dynamic Kinetic Resolution of Azlactones by a Chiral <i>N</i>,<i>N</i>-Dimethyl-4-aminopyridine Derivative Containing a 1,1′-Binaphthyl Unit: Importance of Amide Groups
  作者：Hiroki Mandai、Kohei Hongo、Takuma Fujiwara、Kazuki Fujii、Koichi Mitsudo、Seiji Suga

  DOI：10.1021/acs.orglett.8b01960

  日期：2018.8.17

  resolution (DKR) of azlactones in the presence of benzoic acid and a binaphthyl-based N,N-4-dimethylaminopyridine (DMAP) derivative 1i having two amide groups at the 3,3′-positions of a binaphthyl unit is developed. The reaction proceeded smoothly with a wide range of azlactones to provide α-amino acid derivatives with good to high enantiomeric ratios (er’s). A multigram-scale reaction (2.5 g) for the

  在苯甲酸和基于联萘基的N，N -4-二甲基氨基吡啶（DMAP）衍生物1i的联苯胺基的3,3'-位置上具有两个酰胺基的情况下，开发了内酯的动态动力学拆分（DKR）。该反应在宽范围的氮杂内酯下顺利进行，以提供具有良好至高对映体比率（er's）的α-氨基酸衍生物。还证实了对a内酯2d的DKR的数克规模反应（2.5g），并且将所得产物转化为非天然α-氨基酸6d'。
• Catalytic asymmetric formal [3+2] cycloaddition of isatogens with azlactones to construct indolin-3-one derivatives
  作者：Lihua Xie、Yi Li、Shunxi Dong、Xiaoming Feng、Xiaohua Liu

  DOI：10.1039/d0cc06418a

  日期：——

  A number of enantioenriched indolin-3-one derivatives were readily obtained by chiral guanidine-catalyzed [3+2] cycloaddition of isatogens with azlactones.

  一些手性瓜尼丁催化的异丙基吲哚啉-3-酮衍生物通过异丙基吲哚啉与氮丙烯酮的手性[3+2]环加成反应轻松获得。