3-Bromo-4-isoxazolecarboxylic Acid Ethyl Ester | 111303-36-7

• 分子结构分类: 有机化合物 - 有机卤素化合物 - 芳基卤化物
• 英文名称: 3-Bromo-4-isoxazolecarboxylic Acid Ethyl Ester
• 英文别名: Ethyl 3-bromo-1,2-oxazole-4-carboxylate
• CAS: 111303-36-7
• 化学式: C₆H₆BrNO₃
• 分子量: 220.023
• InChiKey: XLFLPPMXDQEXMM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.6
• 重原子数：
  11
• 可旋转键数：
  3
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  52.3
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  1,1-二溴甲醛肟 、 丙炔酸乙酯 以29%的产率得到
  参考文献：
  名称：

  CHIARINO D.; NAPOLETANO M.; SALA A., J. HETEROCYCL. CHEM., 24,(1987) N 1, 45-46

  摘要：

  DOI：

文献信息

• 1,3-Dipolar cycloaddition synthesis of 3-bromo-5-substituted isoxazoles, useful intermediates for the preparation of pharmacologically active compounds
  作者：D. Chiarino、M. Napoletano、A. Sala

  DOI：10.1002/jhet.5570240109

  日期：1987.1

  monosubstituted acetylenic derivatives 4 to give 3-bromo-5-substituted isoxazoles 5 in high yield. The experimental conditions necessary to overcome difficulties such as the low reactivity of acetylenic dipolarophiles and the high tendency to dimerization of bromonitrile oxide 2, are discussed; the regioselectivity of this 1,3-dipolar cycloaddition is also studied. The obtained improvements in the synthesis of

  Bromonitrile氧化物2，从容易获得的二溴甲醛肟生成1，与单取代的炔属衍生物进行反应4，得到3-溴-5-异恶唑取代的5以高收率。讨论了克服困难的条件，例如乙炔双极性亲和剂的低反应性和溴代腈氧化物2的二聚化趋势高。还研究了这种1，3-偶极环加成反应的区域选择性。据报道在某些药理活性化合物的合成中获得的改进。
• Development of a Practical Synthesis of Stearoyl-CoA Desaturase (SCD1) Inhibitor MK-8245
  作者：Mélina Girardin、Sarah J. Dolman、Sophie Lauzon、Stéphane G. Ouellet、Greg Hughes、Paul Fernandez、George Zhou、Paul D. O’Shea

  DOI：10.1021/op200186d

  日期：2011.9.16

  A practical kilogram scale chromatography-free synthesis of stearoyl-CoA desaturase 1 (SCD1) inhibitor MK-8245 is described. The key features of this sequence include an efficient addition elimination reaction of a piperidine fragment with a 3-bromoisoxaline followed by an iodine-mediated oxidation to the corresponding isoxazole. The development of a safe and scalable tetrazole formation protocol is also presented.