3-Bromo-7,8-dihydroxy-6-methoxy-chromen-2-one | 918300-46-6

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 香豆素及其衍生物
• 英文名称: 3-Bromo-7,8-dihydroxy-6-methoxy-chromen-2-one
• 英文别名: 3-Bromo-7,8-dihydroxy-6-methoxy-2H-1-benzopyran-2-one；3-bromo-7,8-dihydroxy-6-methoxychromen-2-one
• CAS: 918300-46-6
• 化学式: C₁₀H₇BrO₅
• 分子量: 287.067
• InChiKey: LSRMUGGUZYVIAJ-UHFFFAOYSA-N

物化性质

• 沸点：
  512.2±50.0 °C(Predicted)
• 密度：
  1.909±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  16
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.1
• 拓扑面积：
  76
• 氢给体数：
  2
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  秦皮素 在 sulfonic acid functionalized silica N-溴代丁二酰亚胺(NBS) 作用下， 以 甲醇 、 乙腈 为溶剂， 反应 2.0h， 以70%的产率得到3-Bromo-7,8-dihydroxy-6-methoxy-chromen-2-one
  参考文献：
  名称：

  An efficient, rapid and regioselective nuclear bromination of aromatics and heteroaromatics with NBS using sulfonic-acid-functionalized silica as a heterogeneous recyclable catalyst

  摘要：

  A simple, efficient and rapid method has been developed for high-yielding regioselective nuclear monobromination of aromatic and heteroaromatic compounds using NBS in the presence of sulfonic-acid-functionalized silica at room temperature. The catalyst works under heterogeneous conditions and can be recycled. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetlet.2006.10.029

文献信息

• An efficient, rapid and regioselective nuclear bromination of aromatics and heteroaromatics with NBS using sulfonic-acid-functionalized silica as a heterogeneous recyclable catalyst
  作者：Biswanath Das、Katta Venkateswarlu、Maddeboina Krishnaiah、Harish Holla

  DOI：10.1016/j.tetlet.2006.10.029

  日期：2006.12

  A simple, efficient and rapid method has been developed for high-yielding regioselective nuclear monobromination of aromatic and heteroaromatic compounds using NBS in the presence of sulfonic-acid-functionalized silica at room temperature. The catalyst works under heterogeneous conditions and can be recycled. (c) 2006 Elsevier Ltd. All rights reserved.