(2'R,4S)-4-(nitromethyl)-3',4'-dihydro-1'H-spiro[chroman-3,2'-naphthalene]-1',2-dione | 1338566-37-2

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 3,4-二氢香豆素
• 英文名称: (2'R,4S)-4-(nitromethyl)-3',4'-dihydro-1'H-spiro[chroman-3,2'-naphthalene]-1',2-dione
• 英文别名: (2R,4'S)-4'-(nitromethyl)spiro[3,4-dihydronaphthalene-2,3'-4H-chromene]-1,2'-dione
• CAS: 1338566-37-2
• 化学式: C₁₉H₁₅NO₅
• 分子量: 337.332
• InChiKey: RQTNMQCVDREPET-HNAYVOBHSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.2
• 重原子数：
  25
• 可旋转键数：
  1
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.26
• 拓扑面积：
  89.2
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为产物：
  描述：

  (3S,4S)-2-hydroxy-4-(nitromethyl)spiro[2,4-dihydrochromene-3,2'-3,4-dihydronaphthalene]-1'-one 在 pyridinium chlorochromate 作用下， 以 二氯甲烷 为溶剂， 反应 24.0h， 以26 mg的产率得到(2'R,4S)-4-(nitromethyl)-3',4'-dihydro-1'H-spiro[chroman-3,2'-naphthalene]-1',2-dione
  参考文献：
  名称：

  Asymmetric Synthesis of 3,4-Dihydrocoumarin Motif with an All-Carbon Quaternary Stereocenter via a Michael–Acetalization Sequence with Bifunctional Amine-thiourea Organocatalysts

  摘要：

  Asymmetric domino Michael acetalization reactions of 2-hydroxynitrostyrene and 2-oxocyclohexanecarbaldehyde with a bifunctional thioureatertiary-amine organocatalyst, e.g., the Takemoto catalyst, followed by oxidation providing the 1',3-spiro-2'-oxocyclohexan-3,4-dihydrocoumarin having one all-carbon quaternary stereocenter with excellent diastereo- and enantioselectivities (up to >99% ee), are described. The structures and absolute configurations of the products were confirmed by X-ray analysis.

  DOI：

  10.1021/ol202331j

文献信息

• Observation of neighboring ortho-hydroxyl group participation in organocatalytic asymmetric sequential Michael-lactonization reactions: synthesis of highly substituted chiral spirodihydrocoumarins
  作者：Dhevalapally B. Ramachary、R. Madhavachary、M. Shiva Prasad

  DOI：10.1039/c2ob07122c

  日期：——

  A general approach to asymmetric synthesis of highly substituted spirodihydrocoumarins with a quaternary stereocenter was achieved through neighboring ortho-hydroxyl group induced sequential Michael–lactonization reactions on 2-(2-nitrovinyl)phenols with alkyl cyclopentanone-2-carboxylates in the presence of a catalytic amount of quinine–NH–thiourea followed by p-TSA.

  在催化作用下，邻邻邻羟基引发的2-（2-硝基乙烯基）苯酚与烷基环戊酮-2-羧酸酯的连续迈克尔-内酯化反应，实现了一种具有四级立体中心的高度取代的螺二氢香豆素的不对称合成的一般方法。的数量奎宁– N H–硫脲其次是p -TSA。