Bz(4-OMe)-Z-ΔAbu(β-Br)-OMe | 1242683-10-8

• 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: Bz(4-OMe)-Z-ΔAbu(β-Br)-OMe
• 英文别名: methyl (Z)-3-bromo-2-[(4-methoxybenzoyl)amino]but-2-enoate
• CAS: 1242683-10-8
• 化学式: C₁₃H₁₄BrNO₄
• 分子量: 328.162
• InChiKey: IOTGNZOUIFMZSJ-FLIBITNWSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.4
• 重原子数：
  19
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.23
• 拓扑面积：
  64.6
• 氢给体数：
  1
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  Bz(4-OMe)-Z-ΔAbu(β-Br)-OMe 在 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 乙腈 为溶剂， 反应 0.5h， 以91%的产率得到methyl 2-(4-methoxyphenyl)-5-methyloxazole-4-carboxylate
  参考文献：
  名称：

  A mild high yielding synthesis of oxazole-4-carboxylate derivatives

  摘要：

  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.

  DOI：

  10.1016/j.tet.2010.09.014
• 作为产物：
  描述：

  在 N-溴代丁二酰亚胺(NBS) 、 三乙胺 作用下， 生成 Bz(4-OMe)-Z-ΔAbu(β-Br)-OMe
  参考文献：
  名称：

  A mild high yielding synthesis of oxazole-4-carboxylate derivatives

  摘要：

  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.

  DOI：

  10.1016/j.tet.2010.09.014

文献信息

• Synthesis and electrochemical behaviour of β-halodehydroamino acid derivatives
  作者：Paula M. T. Ferreira、L. S. Monteiro、G. Pereira

  DOI：10.1007/s00726-009-0466-x

  日期：2010.7

  conclude that when N-iodosuccinimide was used as reagent a much higher Z-stereoselectivity is found. The electrochemical behaviour of the halogenated dehydroamino acids was studied by cyclic voltammetry. The results show a shift in the reduction peak to higher potentials of the β-halogenated dehydroamino acids when compared with the corresponding non-halogenated derivatives. As expected, the β,β-dihalodehydroalanines

  通过使相应的脱氢氨基酸衍生物与N-卤代琥珀酰亚胺或在β，β-二碘代十二氢丙氨酸与碘反应的情况下，合成了几种新的β，β-二卤代和β-卤代-β-取代的脱氢丙氨酸和脱氢二肽。获得的结果证实，与β-取代的脱氢氨基酸的卤化反应的立体化学结果取决于底物。因此，当将β-苯基脱氢丙氨酸用作底物并且当这些化合物被4-甲苯磺酰基或氨基甲酸酯N-保护时，发现Z-立体选择性增加。从这项研究中，也有可能得出结论，当N-碘代琥珀酰亚胺用作试剂，发现更高的Z-立体选择性。通过循环伏安法研究了卤代脱氢氨基酸的电化学行为。结果表明，与相应的非卤代衍生物相比，β-卤代脱氢氨基酸的还原峰向更高的电位转移。如所预期的，与相应的碘代脱氢氨基酸相比，β，β-二卤代氢丙氨酸显示出比β-卤代-β-取代的脱氢丙氨酸更高的峰势，并且溴衍生物具有更低的峰势。几种β-卤代-β-取代的脱氢氨基酸的受控电势电解以其E和Z异构体的混合物形式提供了相应
• 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.