2-oxoethyl 4-chloro-3-nitrobenzoate

• 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: 2-oxoethyl 4-chloro-3-nitrobenzoate
• 英文别名: 2-Oxoethyl 4-chloro-3-nitrobenzoate
• 化学式: C₉H₆ClNO₅
• 分子量: 243.603
• InChiKey: KKDCMFMMFWZAML-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  16
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.11
• 拓扑面积：
  89.2
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  2-oxoethyl 4-chloro-3-nitrobenzoate 在 对甲苯磺酸 、 glutathione S-transferase 作用下， 以 甲醇 、 aq. phosphate buffer 、 苯 为溶剂， 生成
  参考文献：
  名称：

  Synthesis of a Suite of Bioorthogonal Glutathione S-Transferase Substrates and Their Enzymatic Incorporation for Protein Immobilization

  摘要：

  Label-free protein immobilization allows precise detection of biomolecular events. Preserving enzyme function is intrinsically challenging for these strategies. Considering that glutathione S-transferase (GST) is a broadly employed enzymatic fusion tag, we reported a label-free self-catalyzed immobilization for Schistosoma japonicum GST. We now report the synthesis, structure, and enzymology of a set of 20 smSNAREs (small molecule SNAr-electrophiles). These smSNAREs mimic (electronically) the canonical GST substrate 1-chloro-2,4-dinitrobenzene (CDNB), and bear a wide variety of bioorthogonal functionalities such as alkynes, aldehydes, acetals, and azides. Sixteen analogues including the chloro- and nitro substituted 1, 3, 5, 6, 7, 11, 12, and 13 participated in the GST-catalyzed conjugation, indicating the substrate tolerance of the enzymatic H-site of SjGST. Using UV-vis spectroscopy, we estimate the efficiency of conjugation as a function of substrate diversity. Using LC-MS, we characterized the conjugates formed under each enzymatic transformation. Significant deviations from the canonical CDNB architecture are tolerated. Relative rates between nitro and chloro substituents indicate the nucleophilic addition step is rate determining. Enzyme immobilization on glass slides is affected by additional surface interactions and therefore does not reflect kinetic profiles observed in solution. This new class of heterobifunctional linkers enables a single-step and uniform protein capture on designer surfaces.

  DOI：

  10.1021/jo401278x
• 作为产物：
  描述：

  4-氯-3-硝基苯甲酸 在 氯化亚砜 、 戴斯-马丁氧化剂 作用下， 以 二氯甲烷 、 N,N-二甲基甲酰胺 为溶剂， 反应 7.5h， 生成 2-oxoethyl 4-chloro-3-nitrobenzoate
  参考文献：
  名称：

  Synthesis of a Suite of Bioorthogonal Glutathione S-Transferase Substrates and Their Enzymatic Incorporation for Protein Immobilization

  摘要：

  Label-free protein immobilization allows precise detection of biomolecular events. Preserving enzyme function is intrinsically challenging for these strategies. Considering that glutathione S-transferase (GST) is a broadly employed enzymatic fusion tag, we reported a label-free self-catalyzed immobilization for Schistosoma japonicum GST. We now report the synthesis, structure, and enzymology of a set of 20 smSNAREs (small molecule SNAr-electrophiles). These smSNAREs mimic (electronically) the canonical GST substrate 1-chloro-2,4-dinitrobenzene (CDNB), and bear a wide variety of bioorthogonal functionalities such as alkynes, aldehydes, acetals, and azides. Sixteen analogues including the chloro- and nitro substituted 1, 3, 5, 6, 7, 11, 12, and 13 participated in the GST-catalyzed conjugation, indicating the substrate tolerance of the enzymatic H-site of SjGST. Using UV-vis spectroscopy, we estimate the efficiency of conjugation as a function of substrate diversity. Using LC-MS, we characterized the conjugates formed under each enzymatic transformation. Significant deviations from the canonical CDNB architecture are tolerated. Relative rates between nitro and chloro substituents indicate the nucleophilic addition step is rate determining. Enzyme immobilization on glass slides is affected by additional surface interactions and therefore does not reflect kinetic profiles observed in solution. This new class of heterobifunctional linkers enables a single-step and uniform protein capture on designer surfaces.

  DOI：

  10.1021/jo401278x

文献信息

• Synthesis of a Suite of Bioorthogonal Glutathione S-Transferase Substrates and Their Enzymatic Incorporation for Protein Immobilization
  作者：Alden E. Voelker、Rajesh Viswanathan

  DOI：10.1021/jo401278x

  日期：2013.10.4

  Label-free protein immobilization allows precise detection of biomolecular events. Preserving enzyme function is intrinsically challenging for these strategies. Considering that glutathione S-transferase (GST) is a broadly employed enzymatic fusion tag, we reported a label-free self-catalyzed immobilization for Schistosoma japonicum GST. We now report the synthesis, structure, and enzymology of a set of 20 smSNAREs (small molecule SNAr-electrophiles). These smSNAREs mimic (electronically) the canonical GST substrate 1-chloro-2,4-dinitrobenzene (CDNB), and bear a wide variety of bioorthogonal functionalities such as alkynes, aldehydes, acetals, and azides. Sixteen analogues including the chloro- and nitro substituted 1, 3, 5, 6, 7, 11, 12, and 13 participated in the GST-catalyzed conjugation, indicating the substrate tolerance of the enzymatic H-site of SjGST. Using UV-vis spectroscopy, we estimate the efficiency of conjugation as a function of substrate diversity. Using LC-MS, we characterized the conjugates formed under each enzymatic transformation. Significant deviations from the canonical CDNB architecture are tolerated. Relative rates between nitro and chloro substituents indicate the nucleophilic addition step is rate determining. Enzyme immobilization on glass slides is affected by additional surface interactions and therefore does not reflect kinetic profiles observed in solution. This new class of heterobifunctional linkers enables a single-step and uniform protein capture on designer surfaces.