(5R,8R)-2,4-dioxo-1,3,7-triaza-spiro[4.4]nonane-7,8-dicarboxylic acid 7-benzyl ester 8-tert-butyl ester | 870097-44-2

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: (5R,8R)-2,4-dioxo-1,3,7-triaza-spiro[4.4]nonane-7,8-dicarboxylic acid 7-benzyl ester 8-tert-butyl ester
• 英文别名: 7-benzyl 8-(tert-butyl) (5R,8R)-2,4-dioxo-1,3,7-triazaspiro[4.4]nonane-7,8-dicarboxylate；7-O-benzyl 8-O-tert-butyl (5R,8R)-2,4-dioxo-1,3,7-triazaspiro[4.4]nonane-7,8-dicarboxylate
• CAS: 870097-44-2
• 化学式: C₁₉H₂₃N₃O₆
• 分子量: 389.408
• InChiKey: GHABYNZKMNRHCM-BFUOFWGJSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.3
• 重原子数：
  28
• 可旋转键数：
  6
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.47
• 拓扑面积：
  114
• 氢给体数：
  2
• 氢受体数：
  6

反应信息

• 作为反应物：
  描述：

  (5R,8R)-2,4-dioxo-1,3,7-triaza-spiro[4.4]nonane-7,8-dicarboxylic acid 7-benzyl ester 8-tert-butyl ester 在 palladium on activated charcoal 4-二甲氨基吡啶 、 氢氧化钾 、 三甲基氯硅烷 、 氢气 、 N,N-二异丙基乙胺 、 三氟乙酸 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下， 以 四氢呋喃 、 甲醇 、 乙醚 、 二氯甲烷 、 水 、 N,N-二甲基甲酰胺 为溶剂， 20.0 ℃ 、101.33 kPa 条件下， 反应 9.5h， 生成
  参考文献：
  名称：

  The Synthesis of Curved and Linear Structures from a Minimal Set of Monomers

  摘要：

  Spiro-ladder oligomers of designed shape were assembled from a set of two enantiomeric bis-amino acid monomers. Two tetramers of differing monomer sequence were synthesized to study the effect of monomer stereochemistry upon macromolecular shape. Two-dimensional NMR experiments were used to determine the conformational preference of the monomers within the context of the oligomers. The results of this structural study were used to design two pentamers: one resembling a rod and another with a curved shape. The pentamers were end-labeled with naphthyl and dansyl groups. The design hypothesis was confirmed by measuring the efficiency of fluorescence resonance energy transfer between the naphthyl and dansyl fluorophore pair.

  DOI：

  10.1021/jo051639u
• 作为产物：
  描述：

  (2R,4R)-1-((benzyloxy)carbonyl)-4-hydroxypyrrolidine-2-carboxylic acid 在 Jones reagent 、 硫酸 作用下， 以 乙醇 、 二氯甲烷 、 水 、 丙酮 为溶剂， 反应 96.0h， 生成 (5R,8R)-2,4-dioxo-1,3,7-triaza-spiro[4.4]nonane-7,8-dicarboxylic acid 7-benzyl ester 8-tert-butyl ester
  参考文献：
  名称：

  一种改进的，可扩展的双氨基酸合成

  摘要：

  反式-4-羟基-1-脯氨酸衍生的双氨基酸是手性的环状结构单元，显示出两个带有保护基的α-氨基酸。它们被组装成螺线低聚物—刚性，形状可编程的螺环低聚物，在立体化学和功能上都不同。这里提出的合成集中在最近的改进上，这些改进允许从便宜的反式-4-羟基-1-脯氨酸方便，大规模地合成十二种立体化学纯的双氨基酸。双氨基酸在立体化学上和胺保护基上有所不同，其中一个（对硝基苄基氨基甲酸酯）以前没有被掺入双氨基酸中。

  DOI：

  10.1016/j.tetlet.2016.09.032

文献信息

• Spiroligozymes for Transesterifications: Design and Relationship of Structure to Activity
  作者：Mahboubeh Kheirabadi、Nihan Çelebi-Ölçüm、Matthew F. L. Parker、Qingquan Zhao、Gert Kiss、K. N. Houk、Christian E. Schafmeister

  DOI：10.1021/ja3069648

  日期：2012.11.7

  Transesterification catalysts based. on stereochemically defined, modular, functionalized ladder-molecules (named spiroligozymes) were designed, using the "inside-out" design strategy, and mutated synthetically to improve catalysis. A series of stereochemically and regiochemically diverse bifunctional spiroligozymes were first synthesized to identify the best arrangement of a pyridine as a general base catalyst and an alcohol nucleophile to accelerate attack on vinyl trifluoroacetate as an electrophile. The best bifunctional spiroligozyme reacted with vinyl trifluoroacetate to form an acyl-spiroligozyme conjugate 2.7 X 10(3)-fold faster than the background reaction with a benzyl alcohol. Two trifunctional spiroligozymes were then synthesized that combined a urea with the pyridine and alcohol to act as an oxyanion hole and activate the bound acyl-spiroligozyme intermediate to enable acyl-transfer to methanol. The best trifunctional spiroligozyme carries out multiple turnovers and acts as a transesterification catalyst with k(1)/k(uncat) of 2.2 X 10(3) and k(2)/k(uncat) of 1.3 X 10(2). Quantum mechanical calculations identified the four transition states of the catalytic cycle and provided a detailed view of every stage of the transesterification reaction.