((S)-3-bromo-4,5-dihydroisoxazol-5-yl)methyl acetate | 918440-90-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑啉类
• 英文名称: ((S)-3-bromo-4,5-dihydroisoxazol-5-yl)methyl acetate
• 英文别名: [(5S)-3-bromo-4,5-dihydro-1,2-oxazol-5-yl]methyl acetate
• CAS: 918440-90-1
• 化学式: C₆H₈BrNO₃
• 分子量: 222.038
• InChiKey: JNUJXTOMMSHNSG-YFKPBYRVSA-N

物化性质

• 沸点：
  234.5±32.0 °C(Predicted)
• 密度：
  1.74±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  0.9
• 重原子数：
  11
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  47.9
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为反应物：
  描述：

  ((S)-3-bromo-4,5-dihydroisoxazol-5-yl)methyl acetate 在 potassium carbonate 作用下， 以 甲醇 为溶剂， 反应 0.25h， 以82%的产率得到(5S)-3-bromo-5-hydroxymethyl-Δ²-isoxazoline
  参考文献：
  名称：

  Structure−Activity Relationship Analysis of the Selective Inhibition of Transglutaminase 2 by Dihydroisoxazoles

  摘要：

  Human transglutaminase 2 (TG2) is believed to play an important role in the pathogenesis of various human disorders including celiac sprue, certain neurological diseases, and some types of cancer. Selective inhibition of TG2 should therefore enable further investigation of its role in physiology and disease and may lead to effective clinical treatment. Recently we showed that certain 3-halo-4-,5-dihydroisoxazole containing compounds are selective inhibitors of human TG2 with promising pharmacological activities. Here, we present definitive evidence that this class of compounds targets the active site of human TG2. Structure-activity relationship studies have provided insights into the structural prerequisites for selectivity and have led to the discovery of an inhibitor with about 50-fold higher activity than a prototypical dihydroisoxazole inhibitor with good in vivo activity. A method for preparing enantiomerically enriched analogues was also developed. Our studies show that the 5-(S)-dihydroisoxazole is a markedly better inhibitor of human TG2 than its 5-(R) stereoisomer.

  DOI：

  10.1021/jm060839a
• 作为产物：
  描述：

  乙酸烯丙酯 在 phosphate buffer 、 Amano Lipase PS 作用下， 以 水 、 乙酸乙酯 、 丙酮 为溶剂， 反应 2.0h， 生成 ((S)-3-bromo-4,5-dihydroisoxazol-5-yl)methyl acetate
  参考文献：
  名称：

  Structure−Activity Relationship Analysis of the Selective Inhibition of Transglutaminase 2 by Dihydroisoxazoles

  摘要：

  Human transglutaminase 2 (TG2) is believed to play an important role in the pathogenesis of various human disorders including celiac sprue, certain neurological diseases, and some types of cancer. Selective inhibition of TG2 should therefore enable further investigation of its role in physiology and disease and may lead to effective clinical treatment. Recently we showed that certain 3-halo-4-,5-dihydroisoxazole containing compounds are selective inhibitors of human TG2 with promising pharmacological activities. Here, we present definitive evidence that this class of compounds targets the active site of human TG2. Structure-activity relationship studies have provided insights into the structural prerequisites for selectivity and have led to the discovery of an inhibitor with about 50-fold higher activity than a prototypical dihydroisoxazole inhibitor with good in vivo activity. A method for preparing enantiomerically enriched analogues was also developed. Our studies show that the 5-(S)-dihydroisoxazole is a markedly better inhibitor of human TG2 than its 5-(R) stereoisomer.

  DOI：

  10.1021/jm060839a

文献信息

• Nitrile oxides in medicinal chemistry. 4. Chemoenzymic synthesis of chiral heterocyclic derivatives
  作者：Marco De Amici、Paolo Magri、Carlo De Micheli、Francesca Cateni、Roberto Bovara、Giacomo Carrea、Sergio Riva、Gianluigi Casalone

  DOI：10.1021/jo00036a013

  日期：1992.5

  The two enantiomers of 3-bromo-5-(hydroxymethyl)-DELTA-2-isoxazoline (1) and 2-phenyl-5-(hydroxymethyl)-isoxazolidin-3-one (9) have been prepared in enantiomeric excess higher than 90% by hydrolysis of the corresponding butyrates under the catalysis of lipase PS, which was the most selective catalyst of the enzymes tested. The pairs of enantiomers of 1 and 9 were transformed into the chiral forms of the potent muscarinic ligands 3 and 5. The results obtained with the homogeneous set of esters 6, 7, 10a-d evidence a strong dependence of reaction rate and enantioselectivity of the lipase PS-catalyzed transformations upon both the size of the acyl moiety and the shape of the group carrying the alcoholic part of the ester. In the series of esters 10a-d, the best results were obtained with butyrate 10b. Quite interestingly, on passing from the butyrate of 1 to that of 9, the value of the enantiomeric ratio remained remarkably high but the enantiopreference switched from R to S. In between lies the butyrate of 2-methyl-5-(hydroxymethyl)isoxazolidin-3-one [(+/-)-6] which was barely recognized by lipase PS and yielded alcohol (R)-(-)-2 in a modest enantiomeric excess.