8-Methoxy-2-oxo-8-azabicyclo<3.2.1>oct-6-ene-1,6,7-tricarboxylic acid 1-ethyl ester 6,7-dimethyl ester | 164254-30-2

• 分子结构分类: 有机化合物 - 有机酸及其衍生物 - 羧酸及其衍生物
• 英文名称: 8-Methoxy-2-oxo-8-azabicyclo<3.2.1>oct-6-ene-1,6,7-tricarboxylic acid 1-ethyl ester 6,7-dimethyl ester
• 英文别名: 1-O-ethyl 6-O,7-O-dimethyl 8-methoxy-2-oxo-8-azabicyclo[3.2.1]oct-6-ene-1,6,7-tricarboxylate
• CAS: 164254-30-2
• 化学式: C₁₅H₁₉NO₈
• 分子量: 341.318
• InChiKey: AIDAKXSTDUVKNM-UHFFFAOYSA-N

物化性质

• 沸点：
  434.1±55.0 °C(Predicted)
• 密度：
  1.35±0.1 g/cm3(Temp: 20 °C; Press: 760 Torr)(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  -0.46
• 重原子数：
  24.0
• 可旋转键数：
  5.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.6
• 拓扑面积：
  108.44
• 氢给体数：
  0.0
• 氢受体数：
  9.0

反应信息

• 作为反应物：
  描述：

  8-Methoxy-2-oxo-8-azabicyclo<3.2.1>oct-6-ene-1,6,7-tricarboxylic acid 1-ethyl ester 6,7-dimethyl ester 在 silica gel 作用下， 生成 4-Hydroxy-7-(methoxyimino)cyclohepta-1,3-diene-1,2,3-tricarboxylic acid 3-ethyl ester 1,2-dimethyl ester 、 2-Oxo-8-azabicyclo<3.2.1>oct-6-ene-1,6,7-tricarboxylic acid 1-ethyl ester 6,7-dimethyl ester
  参考文献：
  名称：

  Synthesis of Functionalized Azomethine Ylides via the Rh(II)-Catalyzed Cyclization of .alpha.-Diazo Carbonyls onto Imino .pi.-Bonds

  摘要：

  alpha-Diazo carbonyl compounds containing an imino group in the gamma-position have been found to undergo a rhodium(II) acetate induced cyclization reaction to generate cyclic azomethine ylides. The reactive dipole undergoes a subsequent 1,3-dipolar cycloaddition with added dipolarophiles. The imino/oxime nitrogen lone pair of electrons must be properly oriented so as to interact with the rhodium carbenoid. Thus, acyclic oxime ethers which exist in the proper E-configuration readily undergo the tandem cyclization-cycloaddition reaction. In sharp contrast, the isomeric Z-oximino diazo carbonyl system does not cyclize to an azomethine ylide but rather intramolecularly inserts into the oximino C-H bond. Addition of a catalytic amount of rhodium(II) acetate to (E)-2-(diazoacetyl)benzaldehyde O-methyloxime in the presence of DMAD or N-phenylmaleimide affords a dipolar cycloadduct in high yield. When p-quinone was used as the dipolarophile, the initially formed cycloadduct was treated with acetic anhydride to give a compound containing the basic core dibenzo[a,d]cyclohepten-5,10-imine skeleton found in MK-801. Cyclic imines such as isoxazolines were particularly effective substrates for azomethine ylide formation. The rhodium(II) catalyzed reaction of 3-(4-diazo-3-oxobutyl)-5-phenyl-Delta(2)-isoxazoline with DMAD produced a 4:1 mixture of diastereomeric cycloadducts in good yield. Cyclization of the rhodium carbenoid did not occur with the aromatic isoxazole system and this is presumably due to the low basicity of the nitrogen lone pair of electrons.

  DOI：

  10.1021/jo00097a042
• 作为产物：
  描述：

  (E)-Ethyl 2-diazo-5-<(methoxyimino)methyl>-3-oxopentanoate 在 rhodium(II) acetate dimer 丁炔二酸二甲酯 作用下， 以 苯 为溶剂， 反应 1.0h， 以9%的产率得到Ethyl 2-oxo-6-phenyl-6-azabicyclo<3.1.0>hexane-1-carboxylate
  参考文献：
  名称：

  Synthesis of Functionalized Azomethine Ylides via the Rh(II)-Catalyzed Cyclization of .alpha.-Diazo Carbonyls onto Imino .pi.-Bonds

  摘要：

  alpha-Diazo carbonyl compounds containing an imino group in the gamma-position have been found to undergo a rhodium(II) acetate induced cyclization reaction to generate cyclic azomethine ylides. The reactive dipole undergoes a subsequent 1,3-dipolar cycloaddition with added dipolarophiles. The imino/oxime nitrogen lone pair of electrons must be properly oriented so as to interact with the rhodium carbenoid. Thus, acyclic oxime ethers which exist in the proper E-configuration readily undergo the tandem cyclization-cycloaddition reaction. In sharp contrast, the isomeric Z-oximino diazo carbonyl system does not cyclize to an azomethine ylide but rather intramolecularly inserts into the oximino C-H bond. Addition of a catalytic amount of rhodium(II) acetate to (E)-2-(diazoacetyl)benzaldehyde O-methyloxime in the presence of DMAD or N-phenylmaleimide affords a dipolar cycloadduct in high yield. When p-quinone was used as the dipolarophile, the initially formed cycloadduct was treated with acetic anhydride to give a compound containing the basic core dibenzo[a,d]cyclohepten-5,10-imine skeleton found in MK-801. Cyclic imines such as isoxazolines were particularly effective substrates for azomethine ylide formation. The rhodium(II) catalyzed reaction of 3-(4-diazo-3-oxobutyl)-5-phenyl-Delta(2)-isoxazoline with DMAD produced a 4:1 mixture of diastereomeric cycloadducts in good yield. Cyclization of the rhodium carbenoid did not occur with the aromatic isoxazole system and this is presumably due to the low basicity of the nitrogen lone pair of electrons.

  DOI：

  10.1021/jo00097a042