2,5,7,8-tetrahydroxy-3-methyl-1,4-naphthoquinone | 27167-29-9

• 分子结构分类: 有机化合物 - 苯类化合物 - 萘
• 英文名称: 2,5,7,8-tetrahydroxy-3-methyl-1,4-naphthoquinone
• 英文别名: 2,5,7,8-tetrahydro-3-methyl-1,4-naphthoquinone；2.5.7.8-Tetrahydroxy-3-methyl-naphthochinon-(1.4)
• CAS: 27167-29-9
• 化学式: C₁₁H₈O₆
• 分子量: 236.181
• InChiKey: IDHGRSYCXLFTIR-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.01
• 重原子数：
  17.0
• 可旋转键数：
  0.0
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.09
• 拓扑面积：
  115.06
• 氢给体数：
  4.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  重氮甲烷 、 2,5,7,8-tetrahydroxy-3-methyl-1,4-naphthoquinone 以 乙醚 为溶剂， 以89%的产率得到5,8-dihydroxy-2,7-dimethoxy-3-methyl-1,4-naphthoquinone
  参考文献：
  名称：

  摘要：

  A set of substituted 2-hydroxy-6(7)-methoxynaphthazarins and 7(8)-hydroxypyranonaphthazarins were synthesized. The IR spectra of 2-hydroxy-6-methoxynaphthazarins and 7-hydroxypyranonaphthazarins, on the one hand, and of 2-hydroxy-7-methoxynaphthazarins and 8-hydroxypyranonaphthazarins, on the other hand, have the characteristic nonoverlapping intervals of stretching vibration frequencies of the beta -hydroxy groups. These regularities confirm the structures of cristazarin and 6-methylcristazarin, which are metabolites of lichen Cladonia cristatella.

  DOI：

  10.1023/a:1009533403588
• 作为产物：
  描述：

  过氧化乙酰 、 4,5,7,8-四羟基萘-1,2-二酮 以 叔丁醇 为溶剂， 以43%的产率得到2,5,7,8-tetrahydroxy-3-methyl-1,4-naphthoquinone
  参考文献：
  名称：

  摘要：

  A set of substituted 2-hydroxy-6(7)-methoxynaphthazarins and 7(8)-hydroxypyranonaphthazarins were synthesized. The IR spectra of 2-hydroxy-6-methoxynaphthazarins and 7-hydroxypyranonaphthazarins, on the one hand, and of 2-hydroxy-7-methoxynaphthazarins and 8-hydroxypyranonaphthazarins, on the other hand, have the characteristic nonoverlapping intervals of stretching vibration frequencies of the beta -hydroxy groups. These regularities confirm the structures of cristazarin and 6-methylcristazarin, which are metabolites of lichen Cladonia cristatella.

  DOI：

  10.1023/a:1009533403588

文献信息

• ——
  作者：V. P. Glazunov、A. Ya. Yakubovskaya、N. D. Pokhilo、N. V. Bochinskaya、V. Ph. Anufriev

  DOI：10.1023/a:1022425121552

  日期：——

  A series of substituted (poly)hydroxylated naphthazarins (5.8-dihydroxy-1,4-naphthoquinones) were synthesized. In general, (poly) hydroxynaphthazarins exist in organic aprotic solvents as mixtures of tautomeric 1,4-naphthoquinonoid forms (IR data). The ratio of tautomers was determined for the first time. The effects of the nature of substituents and the solvent polarity on the tautomeric equilibrium were qualitatively estimated,
• RADICAL POLYMERIZATION CONTROL AGENT AND RADICAL POLYMERIZATION CONTROL METHOD
  申请人：Kawasaki Kasei Chemicals Ltd.

  公开号：US20210122692A1

  公开（公告）日：2021-04-29

  A conventional polymerization inhibitor is for example an agent to scavenge radicals generated during storage of a radical polymerizable compound and used to stably handle the radical polymerizable compound, but is unnecessary when the radical polymerizable compound is to be subjected to radical polymerization reaction, and is preferably removed at the time of the radical polymerization reaction. The object of the present invention is to obviate inconvenience of removing the polymerization inhibitor at the time of radical polymerization. The radical polymerization control agent contained in a radical polymerizable composition of the present invention functions as a radical polymerization inhibitor for example stored in a dark place, but loses its radical polymerization inhibiting effect when polymerization is initiated while being irradiated with light at a certain specific wavelength at the time of polymerization. Thus, radical polymerization of the radical polymerizable compound is easily initiated without increasing the amount of a radical polymerization initiator. That is, the radical polymerization control agent of the present invention is a radical polymerization control agent which is a corn pound having an effect to inhibit radical polymerization of a radical polymerizable compound and which loses the radical polymerization inhibiting effect under irradiation with light rays containing light within a wavelength range of from 300 nm to 500 nm.
• ——
  作者：V. P. Glazunov、A. Ya. Tchizhova、O. P. Shestak、G. I. Sopel"nyak、V. Ph. Anufriev

  DOI：10.1023/a:1009533403588

  日期：——

  A set of substituted 2-hydroxy-6(7)-methoxynaphthazarins and 7(8)-hydroxypyranonaphthazarins were synthesized. The IR spectra of 2-hydroxy-6-methoxynaphthazarins and 7-hydroxypyranonaphthazarins, on the one hand, and of 2-hydroxy-7-methoxynaphthazarins and 8-hydroxypyranonaphthazarins, on the other hand, have the characteristic nonoverlapping intervals of stretching vibration frequencies of the beta -hydroxy groups. These regularities confirm the structures of cristazarin and 6-methylcristazarin, which are metabolites of lichen Cladonia cristatella.