glutaric acid mono-(4,5-dimethoxy-2-nitrobenzyl) ester | 457612-05-4

• 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: glutaric acid mono-(4,5-dimethoxy-2-nitrobenzyl) ester
• 英文别名: 5-[(4,5-Dimethoxy-2-nitrophenyl)methoxy]-5-oxopentanoic acid
• CAS: 457612-05-4
• 化学式: C₁₄H₁₇NO₈
• 分子量: 327.291
• InChiKey: MSPFMZDKLXGBMN-UHFFFAOYSA-N

物化性质

• 熔点：
  110-111 °C
• 沸点：
  530.0±50.0 °C(Predicted)
• 密度：
  1.329±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  1.2
• 重原子数：
  23
• 可旋转键数：
  9
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.43
• 拓扑面积：
  128
• 氢给体数：
  1
• 氢受体数：
  8

反应信息

• 作为反应物：
  描述：

  glutaric acid mono-(4,5-dimethoxy-2-nitrobenzyl) ester 在 4-二甲氨基吡啶 、 N,N'-二环己基碳二亚胺 作用下， 以 氯仿 、 乙腈 为溶剂， 反应 72.0h， 生成 戊二酸
  参考文献：
  名称：

  Isotope Effects in Photochemistry:  Application to Chromatic Orthogonality

  摘要：

  The main challenge in developing new wavelength-specific photolabile protecting groups is the rigorous control of the photolysis rate. This rate is controlled by two factors: the chromophore absorbance and the reaction quantum yield. Fine-tuning the properties by changing substituents or structural features is difficult, because both factors are independently affected. By the use of the kinetic isotope effect, we could tune the quantum yield without altering the absorbance, and hence control the overall reaction rate. We exemplified this approach with chromatically orthogonally protected diesters.

  DOI：

  10.1021/ol070820h
• 作为产物：
  描述：

  6-硝基藜芦醛 在 吡啶 、 4-二甲氨基吡啶 、 sodium tetrahydroborate 作用下， 以 甲醇 、 氯仿 为溶剂， 反应 25.0h， 生成 glutaric acid mono-(4,5-dimethoxy-2-nitrobenzyl) ester
  参考文献：
  名称：

  Wavelength-Controlled Orthogonal Photolysis of Protecting Groups

  摘要：

  The selective control of a chemical process by the use of an electromagnetic wave has been a challenging goal for several decades. In this article, we describe for the first time the use of a monochromatic light beam to differentiate two different reactive centers. A direct application of this concept is found in the chemistry of protecting groups. Two different photolabile protecting groups were tuned to be responsive to a specific wavelength (e.g., 254 or 420 nm). Using derivatives of the 2-nitroveratryl fragment (such as 10, sensitive at 420 nm) and 3',5'-dimethoxybenzoin fragment (such as 4, sensitive at 254 nm), it was shown that energy transfer phenomena did not erode the selectivity. Both the inter- and the intramolecular cases were studied and showed selectivities within the synthetically useful range. Hence, we could replace the traditional chemical orthogonality by a chromatic orthogonality.

  DOI：

  10.1021/jo025837m

文献信息

• Sequentially Photocleavable Protecting Groups in Solid-Phase Synthesis
  作者：Martin Kessler、Ralf Glatthar、Bernd Giese、Christian G. Bochet

  DOI：10.1021/ol027454g

  日期：2003.4.1

  [reaction: see text] A sequential solid-phase peptide synthesis was developed using both photolabile linker and protecting groups. The chromatic sequential lability between a tert-butyl ketone-derived linker (sensitive to irradiation at 305 nm) and a nitroveratryloxycarbonyl (NVOC) group (sensitive at 360 nm) was exploited to prepare Leu-Enkephalin in a 55% overall yield. This new strategy allows the

  [反应：见正文]使用光不稳定的连接基和保护基团开发了顺序的固相肽合成方法。利用叔丁基酮衍生的连接基（对305 nm的辐射敏感）和硝基过碳酰氧羰基（NVOC）基团（对360 nm敏感）之间的色序不稳定性来制备亮氨酸-脑啡肽，总产率为55％。通过避免使用常见的脱保护试剂（例如三氟乙酸或哌啶），该新策略允许在基本中性的介质中制备肽。
• Isotope Effects in Photochemistry. 1. <i>o</i>-Nitrobenzyl Alcohol Derivatives
  作者：Aurélien Blanc、Christian G. Bochet

  DOI：10.1021/ja049686b

  日期：2004.6.1

  The photolysis of o-nitrobenzyl alcohol derivatives shows a strong kinetic isotope effect (KIE up to 8.3) at the benzylic center. For some derivatives, the KIE is wavelength dependent, suggesting the involvement of higher excited states. In addition to the important mechanistic consequences, isotopic substitution is a convenient way to alter the quantum yield without changing the absorbance, as would the introduction of substituents. This paves the way for a subtle tuning of the reaction rates in photochemical reactions. We illustrated this feature in the sequential deprotection of a diester protected at both termini with photolabile groups.