| 221028-01-9

• CAS: 221028-01-9
• 化学式: C₈₈H₁₂₈Li₂N₈Ni₂O₄
• 分子量: 1493.3
• InChiKey: KCNPWWJCZCGDPJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
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• 重原子数：
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• 可旋转键数：
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• 环数：
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• sp3杂化的碳原子比例：
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• 拓扑面积：
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• 氢给体数：
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• 氢受体数：
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反应信息

• 作为产物：
  描述：

  dilithium;nickel(2+);5,5,10,10,15,15,20,20-octaethylporphyrin-21,22,23,24-tetraide;oxolane 、 以 四氢呋喃 为溶剂， 生成
  参考文献：
  名称：

  One- and Two-Electron Oxidative Pathways Leading to Cyclopropane-Containing Oxidized Porphyrinogens and C−C-Coupled Porphyrinogens from Alkali Cation− and Transition Metal−meso-Octaethylporphyrinogen Complexes

  摘要：

  This report deals with the different transition metal- and alkali cation-assisted oxidation pathways of the meso-octaethylporphyrinogen tetraanion [Et8N4](4-). The two-electron oxidation of [Et8N4Mn{Na(thf)(2)}(2)], 4, with Cp2FeBPh4 led to the corresponding monocyclopropane derivative [Et8N4(Delta)Mn], 6, [Delta = cyclopropane], while the one-electron oxidation with CuCl2 or O-2 led to the Mn(III)-porphyrinogen [Et8N4Mn][Li(thf)(4)], 5, which can be further oxidized by an excess of CuCl2 to [Et8N4(Delta)(2)Mn-Cl](+)[Cu9Cl11](0.5), 7. The formation of 7 does not follow the expected sequence Mn(II) --> Mn(III) --> Mn(II)-monocyclopropane --> Mn(II) - biscyclopropane-porphyrinogen. In the case of iron(II)-porphyrinogen, [Et8N4Fe{Li(thf)(2)}(2)], 9, the oxidation led in a preliminary stage to the iron(III) derivative [Et8N4Fe][Li(thf)(4)], 10, then to the metalated form of the biscyclopropane-porphyrinogen [Et8N4(Delta)(2)Fe-Cl]{mu-Cu4Cl5}], 11. The supposed stabilization of the biscyclopropane by the copper(I) cluster was ruled out by carrying the oxidation of [Cy4N4Fe{Li(thf)(2)}(2)], 11, to [Cy4N4(Delta)(2)Fe-Cl][Cu2Cl4], 14. The stepwise oxidation of [Et8N4M(thf)(4)] [M = Li, 1; M = Na, 2] with Cp2FeBPh4 led to [Et8N4(Delta)Li(2)thf(2)], 15, [Et8N4(Delta)Li]BPh4, 16, and [Et8N4(Delta)Na]BPh4, 17. The reaction of 1 with 16 leading to 15 showed how the C-C moiety in cyclopropane can be engaged in an intermolecular electron transfer. The reaction of 17 with 18-crown-6 allowed the release of biscyclopropane-porphyrinogen [Et8N4(Delta(2))] Particularly interesting is the thermal rearrangement of 15 to 19 occurring via intra- and intermolecular electron transfers with the transposition of the C-C bond of the cyclopropane to a C-C bridge across the beta position of two adjacent pyrroles. In the case of metals, such as Ni(II), which do not undergo oxidation state changes, the primary oxidation product of a metalla-meso-octaalkylporphyrinogen is the monocyclopropane derivative, which reacting with the starting material masks an overall one-electron oxidation. In fact, the reaction of [Et8N4Ni{Li(thf)(2)}(2)], 20, with 2 equiv of Cp2FeBPh4 led to the expected [Et8N4(Delta)Ni], 21, while the reaction of 20 with 1 equiv of Cp2FeBPh4 led to the dimer [(beta-beta)(Et8N4)(2)Ni-2], 22, which forms equally well from the reaction of 20 and 21. Complex 22 is a quite unique metallaporphyrinogen dimer, where the two monomeric units are joined via a C-C bond in the beta position of a pyrrole. Such a reaction shows that the methodology can accede to oligomeric forms of metallaporphyrinogens.

  DOI：

  10.1021/ja982178f