methyl 2-(4-methoxyphenyl)-5-methyloxazole-4-carboxylate | 1084941-03-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: methyl 2-(4-methoxyphenyl)-5-methyloxazole-4-carboxylate
• 英文别名: Methyl 2-(4-methoxyphenyl)-5-methyloxazole-4-carboxylate；methyl 2-(4-methoxyphenyl)-5-methyl-1,3-oxazole-4-carboxylate
• CAS: 1084941-03-6
• 化学式: C₁₃H₁₃NO₄
• 分子量: 247.251
• InChiKey: WQFLVVIMDAZCQF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.6
• 重原子数：
  18
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.23
• 拓扑面积：
  61.6
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  methyl 2-(4-methoxyphenyl)-5-methyloxazole-4-carboxylate 在 lithium hydroxide 、 水 、 盐酸 作用下， 以 四氢呋喃 、 水 为溶剂， 生成 2-(4-甲氧基苯基)-5-甲基-1,3-恶唑-4-羧酸
  参考文献：
  名称：

  Towards Gram-negative antivirulence drugs: New inhibitors of HldE kinase

  摘要：

  Gram-negative bacteria lacking heptoses in their lipopolysaccharide (LPS) display attenuated virulence and increased sensitivity to human serum and to some antibiotics. Thus inhibition of bacterial heptose synthesis represents an attractive target for the development of new antibacterial agents. HldE is a bifunctional enzyme involved in the synthesis of bacterial heptoses. Development of a biochemical assay suitable for high-throughput screening allowed the discovery of inhibitors 1 and 2 of HldE kinase. Study of the structure-activity relationship of this series of inhibitors led to highly potent compounds. (c) 2008 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2008.12.021
• 作为产物：
  描述：

  methyl 2-(4-methoxybenzoylamino)-3-oxobutanoate 在 碘 、 三乙胺 、 三苯基膦 作用下， 以 二氯甲烷 为溶剂， 以81%的产率得到methyl 2-(4-methoxyphenyl)-5-methyloxazole-4-carboxylate
  参考文献：
  名称：

  The rhodium carbene route to oxazoles: a remarkable catalyst effect

  摘要：

  在四乙酸二铑催化下，α-偶氮-β-酮羧酸盐和-膦酸盐与十一烷基羧酰胺发生反应，通过碳烯 N-H 插入和环脱水作用生成 2-芳基噁唑-4-羧酸盐和 4-膦酸盐；与此形成鲜明对比的是，在四氟丁酰胺二铑催化下，区域选择性发生了巨大变化，生成了噁唑-5-羧酸盐和 5-膦酸盐。

  DOI：

  10.1039/b903878g

文献信息

• Synthesis of Substituted Oxazoles from<i>N</i>-Acyl-β-hydroxyamino Acid Derivatives
  作者：Paula M. T. Ferreira、Luís S. Monteiro、Goreti Pereira

  DOI：10.1002/ejoc.200800602

  日期：2008.9

  β-diiododehydroalanine derivatives. Although the reason for the different reactivities of the N-acyldehydroamino acids is not completely clear to us, cyclic voltammetry studies showed that the less-reactive derivatives have higher reduction potentials. This suggests that the double bonds in dehydroaminobutyric acid derivatives are more susceptible to electrophilic attack by iodine.(© Wiley-VCH Verlag GmbH & Co. KGaA

  制备了几种 N-酰基-β-羟基氨基酸，并在 4-（二甲氨基）吡啶存在下用二碳酸二叔丁酯处理，然后用 N,N,N',N'-四甲基胍处理，得到相应的N-酰基脱氢氨基酸的产率很高。然后用 I2/K2CO3 和 1,8-二氮杂双环 [5.4.0] undec-7-ene 处理这些。N-酰基脱氢氨基丁酸的甲酯以良好至高产率得到相应的取代恶唑。N-酰基脱氢苯丙氨酸与β-碘脱氢苯丙氨酸一起以低至中等产率得到5-苯基恶唑衍生物。在相同条件下，N-酰基脱氢丙氨酸不能得到相应的恶唑。然而，当反应在没有 DBU 的情况下进行时，可以分离出 β,β-二碘脱氢丙氨酸衍生物。尽管我们并不完全清楚 N-酰基脱氢氨基酸不同反应性的原因，但循环伏安法研究表明，反应性较低的衍生物具有更高的还原电位。这表明脱氢氨基丁酸衍生物中的双键更容易受到碘的亲电攻击。 (© Wiley-VCH Verlag GmbH & Co. KGaA
• Rhodium Carbene Routes to Oxazoles and Thiazoles. Catalyst Effects in the Synthesis of Oxazole and Thiazole Carboxylates, Phosphonates, and Sulfones
  作者：Baolu Shi、Alexander J. Blake、William Lewis、Ian B. Campbell、Brian D. Judkins、Christopher J. Moody

  DOI：10.1021/jo902256r

  日期：2010.1.1

  Dirhodium tetraacetate catalyzed reaction of α-diazo-β-keto-carboxylates and -phosphonates with arenecarboxamides gives 2-aryloxazole-4-carboxylates and 4-phosphonates by carbene N−H insertion and cyclodehydration. In stark contrast, dirhodium tetrakis(heptafluorobutyramide) catalysis results in a dramatic change of regioselectivity to give oxazole-5-carboxylates and 5-phosphonates. α-Diazo-β-ketosulfones

  四乙酸二丁酯催化α-重氮-β-酮基羧酸酯和-膦酸酯与芳烃酰胺的反应，通过卡宾NH插入和环脱水作用，制得2-芳基恶唑-4-羧酸酯和4-膦酸酯。与之形成鲜明对比的是，四（七氟丁酰胺）四氢吡啶鎓催化作用会导致区域选择性的显着变化，从而产生5-羧酸恶唑酯和5-膦酸酯。α-重氮-β-酮砜的行为相似，在四（七氟丁酰胺）四氢吡啶鎓与羧酰胺的催化反应下生成5-磺酰基恶唑。硫代羧酰胺的类似反应得到相应的噻唑-5-羧酸盐，-膦酸酯和-砜。
• A mild high yielding synthesis of oxazole-4-carboxylate derivatives
  作者：Paula M.T. Ferreira、Elisabete M.S. Castanheira、Luís S. Monteiro、Goreti Pereira、Helena Vilaça

  DOI：10.1016/j.tet.2010.09.014

  日期：2010.11

  Several 2,5-disubstituted oxazole-4-carboxylates were prepared in high yields from the methyl esters of N-acyl-beta-halodehydroaminobutyric acid derivatives by treatment with a 2% solution of DBU in acetonitrile. The scope of this reaction was investigated and it was found that dehydrodipeptides having a beta-bromodehydroaminobutyric acid residue gave the corresponding oxazoles in good yields. The photophysical properties of some of the oxazoles prepared were studied in four solvents of different polarity. All compounds have reasonable high fluorescence quantum yields and a moderate solvent sensitivity, which makes them good candidates to be used as fluorescent probes. One of the fluorescent oxazoles prepared was inserted after cleavage of the methyl ester into two model peptides using a conventional solution phase strategy. The photophysical properties of the labelled peptides were studied in ethanol and water and compared with those of the oxazole. The results obtained showed that the oxazole maintains a good fluorescence level and the same solvent sensitivity when linked to a peptide chain. (C) 2010 Elsevier Ltd. All rights reserved.