| 1056310-66-7

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• CAS: 1056310-66-7
• 化学式: C₂₅H₂₅NO₅
• 分子量: 419.477
• InChiKey: FKMQQAUZQXXDBZ-MBSDFSHPSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.49
• 重原子数：
  31.0
• 可旋转键数：
  9.0
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  84.86
• 氢给体数：
  2.0
• 氢受体数：
  5.0

反应信息

• 作为反应物：
  描述：

  在 二乙胺基三氟化硫 、 potassium carbonate 作用下， 以 二氯甲烷 为溶剂， 反应 1.0h， 以69%的产率得到benzyl (4S,5R)-5-methyl-2-(2-phenylmethoxyphenyl)-4,5-dihydro-1,3-oxazole-4-carboxylate
  参考文献：
  名称：

  A Latent Oxazoline Electrophile for N−O−C Bond Formation in Pseudomonine Biosynthesis

  摘要：

  Nitrogen-heteroatom bonds figure prominently in the structural, chemical, and functional diversity of natural products. In the case of Pseudomonas siderophore pseudomonine, an N-O hydroxamate linkage is found uncommonly configured in an isoxazolidinone ring. In an effort to understand the biogenesis of this heterocycle, we have characterized the pseudomonine synthetase in vitro and reconstituted the complete biosynthetic pathway. Our results indicate that the isoxazolidinone of pseudomonine arises from spontaneous rearrangement of an oxazoline precursor. To the best of our knowledge, this is a previously uncharacterized mode of post-assembly line heterocyclization. Our results establish the oxygen of the ubiquitous siderophore hydroxamate functionality as a nucleophile and may be indicative of general strategy for N-O-C bond formation in nature.

  DOI：

  10.1021/ja804499r
• 作为产物：
  描述：

  2-苄氧基苯甲酸 、 L-allo-Thr(OBn) 在 1-羟基苯并三唑 、 盐酸-N-乙基-Nˊ-(3-二甲氨基丙基)碳二亚胺 、 三乙胺 作用下， 以 二氯甲烷 为溶剂， 反应 12.0h， 以50%的产率得到
  参考文献：
  名称：

  A Latent Oxazoline Electrophile for N−O−C Bond Formation in Pseudomonine Biosynthesis

  摘要：

  Nitrogen-heteroatom bonds figure prominently in the structural, chemical, and functional diversity of natural products. In the case of Pseudomonas siderophore pseudomonine, an N-O hydroxamate linkage is found uncommonly configured in an isoxazolidinone ring. In an effort to understand the biogenesis of this heterocycle, we have characterized the pseudomonine synthetase in vitro and reconstituted the complete biosynthetic pathway. Our results indicate that the isoxazolidinone of pseudomonine arises from spontaneous rearrangement of an oxazoline precursor. To the best of our knowledge, this is a previously uncharacterized mode of post-assembly line heterocyclization. Our results establish the oxygen of the ubiquitous siderophore hydroxamate functionality as a nucleophile and may be indicative of general strategy for N-O-C bond formation in nature.

  DOI：

  10.1021/ja804499r

文献信息

• Structure–activity relationship of new anti-tuberculosis agents derived from oxazoline and oxazole benzyl esters
  作者：Garrett C. Moraski、Mayland Chang、Adriel Villegas-Estrada、Scott G. Franzblau、Ute Möllmann、Marvin J. Miller

  DOI：10.1016/j.ejmech.2009.12.074

  日期：2010.5

  During the syntheses and studies of natural iron chelators (mycobactins), we serendipitously discovered that a simple, small molecule, oxazoline-containing intermediate 3 displayed surprising anti-tuberculosis activity (MIC of 7.7 μM, average). Herein we report elaboration of SAR around this hit as well as the syntheses and evaluation of a hundred oxazoline- and oxazole-containing compounds derived from

  在天然铁螯合剂（分枝杆菌素）的合成和研究过程中，我们偶然发现一种简单的小分子含恶唑啉中间体3表现出令人惊讶的抗结核活性（平均MIC为7.7 μM）。在此，我们报告了围绕这一打击的 SAR 详细阐述，以及从有效的三步过程衍生的一百种含恶唑啉和恶唑化合物的合成和评估：1）与丝氨酸或苏氨酸形成 β-羟基酰胺； 2)环化得到恶唑啉； 3)脱水得到相应的恶唑。通过这种方法制备的许多化合物显示出具有令人印象深刻的抗结核分枝杆菌活性、极低的毒性和因此高的治疗指数，以及对更顽固的非复制形式的结核分枝杆菌的活性。它们结构的独特性和简单性应该使它们能够进一步优化以满足 ADME（吸收、分布、代谢、排泄）要求。八种最有效的体外化合物的合成得到了扩大，并在小鼠体内感染模型中测试了这些化合物，以评估其功效，然后再进行更精细的化合物设计和优化。