4-{4'-[(tert-butyloxycarbonyl)amino]benzyl}benzoic acid | 474124-92-0

• 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: 4-{4'-[(tert-butyloxycarbonyl)amino]benzyl}benzoic acid
• CAS: 474124-92-0
• 化学式: C₁₉H₂₁NO₄
• 分子量: 327.38
• InChiKey: BFVGHCSQMOQHLV-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.32
• 重原子数：
  24.0
• 可旋转键数：
  4.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.26
• 拓扑面积：
  75.63
• 氢给体数：
  2.0
• 氢受体数：
  3.0

反应信息

• 作为反应物：
  描述：

  4-{4'-[(tert-butyloxycarbonyl)amino]benzyl}benzoic acid 在 sodium azide 、 水 、 三乙胺 作用下， 以 水 、 丙酮 、 甲苯 、 乙腈 为溶剂， 反应 16.0h， 生成 bis-4-{[4'-(tert-butyloxycarbonyl)amino]benzyl}phenyl urea
  参考文献：
  名称：

  Synthesis, Characterization, and Solvolysis of Mono- and Bis-S-(glutathionyl) Adducts of Methylene-bis-(phenylisocyanate) (MDI)

  摘要：

  Bifunctional isocyanates are highly reactive compounds that undergo nucleophilic attack by a variety of functional groups available in the biological system. While the etiology of the respiratory disease caused by diisocyanates is not fully understood, a great deal of research has been performed to elucidate the chemical mechanisms involved in the direct and indirect effects of these compounds. Since adducts of isocyanates are found not only to proteins along the entire respiratory tree but also to proteins in the circulatory system, it is likely that a transport mechanism for the isocyanate from the respiratory to the circulatory system exists. The initial reaction of isocyanates with cellular thiols to form thiocarbamates, which are known to release the isocyanate under physiological conditions, is believed to provide a possible carrier mechanism for the isocyanate functional group. Previous work with aliphatic mono-isocyanates and the aromatic diisocyanate toluene diisocyanate has demonstrated the feasibility of this mechanisin. Adding to this database, the products of the reaction of the highly water-insoluble, low vapor pressure, methylene-bis-(phenylisocyanate) (MDI) with glutathione were synthesized, and their chemical stability under various pH and buffer conditions was tested. Novel synthetic routes were developed for both the mono- and bis-S-(glutathionyl) adducts with MDI that yielded each compound in analytically pure form. Both compounds were found to be unstable under mild basic conditions (phosphate-buffered saline, pH 7.4, and NaHCO3, pH 8.2), however to a different degree. Furthermore, a significant influence of the pH value (the rate of degradation increases with pH) and the concentration of free glutathione (increasing thiol stabilizes the adduct) on the stability was observed, indicating a base-catalyzed mechanism of the degradation/formation of the thiocarbamate bond. Unlike the monoadduct, which forms almost exclusively the polyurea upon degradation, a variety of products were formed upon degradation of the his adduct. Though the disappearance of the his adduct was complete as measured by HPLC, H-1 NMR spectra showed the existence of residual thiocarbamate bonds in the final mixture. In both cases, no evidence of the free methylene-bis-phenylamine (MDA) could be detected under the applicable conditions.

  DOI：

  10.1021/tx0255020
• 作为产物：
  描述：

  二碳酸二叔丁酯 、 4-(4'-aminobenzyl)benzoic acid 在 sodium hydroxide 作用下， 以 1,4-二氧六环 、 水 为溶剂， 反应 17.0h， 以78%的产率得到4-{4'-[(tert-butyloxycarbonyl)amino]benzyl}benzoic acid
  参考文献：
  名称：

  Synthesis, Characterization, and Solvolysis of Mono- and Bis-S-(glutathionyl) Adducts of Methylene-bis-(phenylisocyanate) (MDI)

  摘要：

  Bifunctional isocyanates are highly reactive compounds that undergo nucleophilic attack by a variety of functional groups available in the biological system. While the etiology of the respiratory disease caused by diisocyanates is not fully understood, a great deal of research has been performed to elucidate the chemical mechanisms involved in the direct and indirect effects of these compounds. Since adducts of isocyanates are found not only to proteins along the entire respiratory tree but also to proteins in the circulatory system, it is likely that a transport mechanism for the isocyanate from the respiratory to the circulatory system exists. The initial reaction of isocyanates with cellular thiols to form thiocarbamates, which are known to release the isocyanate under physiological conditions, is believed to provide a possible carrier mechanism for the isocyanate functional group. Previous work with aliphatic mono-isocyanates and the aromatic diisocyanate toluene diisocyanate has demonstrated the feasibility of this mechanisin. Adding to this database, the products of the reaction of the highly water-insoluble, low vapor pressure, methylene-bis-(phenylisocyanate) (MDI) with glutathione were synthesized, and their chemical stability under various pH and buffer conditions was tested. Novel synthetic routes were developed for both the mono- and bis-S-(glutathionyl) adducts with MDI that yielded each compound in analytically pure form. Both compounds were found to be unstable under mild basic conditions (phosphate-buffered saline, pH 7.4, and NaHCO3, pH 8.2), however to a different degree. Furthermore, a significant influence of the pH value (the rate of degradation increases with pH) and the concentration of free glutathione (increasing thiol stabilizes the adduct) on the stability was observed, indicating a base-catalyzed mechanism of the degradation/formation of the thiocarbamate bond. Unlike the monoadduct, which forms almost exclusively the polyurea upon degradation, a variety of products were formed upon degradation of the his adduct. Though the disappearance of the his adduct was complete as measured by HPLC, H-1 NMR spectra showed the existence of residual thiocarbamate bonds in the final mixture. In both cases, no evidence of the free methylene-bis-phenylamine (MDA) could be detected under the applicable conditions.

  DOI：

  10.1021/tx0255020