4-methoxy-4'-cyanobicumene | 129970-59-8

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 二苯乙烯类
• 英文名称: 4-methoxy-4'-cyanobicumene
• 英文别名: 4-[3-(4-Methoxyphenyl)-2,3-dimethylbutan-2-yl]benzonitrile
• CAS: 129970-59-8
• 化学式: C₂₀H₂₃NO
• 分子量: 293.409
• InChiKey: FNXRKYAAZHHACA-UHFFFAOYSA-N

物化性质

• 熔点：
  134-135 °C(Solv: ethanol (64-17-5); water (7732-18-5))
• 沸点：
  403.9±38.0 °C(Predicted)
• 密度：
  1.04±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.6
• 重原子数：
  22
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.35
• 拓扑面积：
  33
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  4-methoxy-4'-cyanobicumene 在 硝酸 作用下， 以 乙酸酐 为溶剂， 生成 3-nitro-4-methoxy-4'-cyanobicumene
  参考文献：
  名称：

  Photochemically generated ion and radical pairs. Self-destructive charge-transfer complexes

  摘要：

  Irradiation of CT complexes between 4-methoxy-4'-X-bicumenes, 1a-e (X = H, a; OMe, b; Me, c, CF3, d, CN, e) and tetranitromethane (2) results in efficient generation of radical and ion pairs (phi-almost-equal-to 0.20). The identity of the final products depends on the dynamics of these pairs, which in turn is dramatically influenced by substitution and solvent. In all cases, 2.- dissociates rapidly ( < 3 ps) into (NO2)C-3(-) (4-) and NO2.. In CH2Cl2, 1a.+ reacts with 4- (aromatic trinitromethylation) and undergoes C-C bond fragmentation before diffusional separation of fragments can occur. Thus, a tetrad of reactive intermediates (cumyl radical, NO2., p-methoxycumyl cation and 4-) are produced in a single solvent cage. The cumyl radical is oxidized by 2, and both cumyl cations undergo alpha-trinitromethylation. The cumyl cations undergo trinitromethylation in the original solvent cage which is kinetically equivalent to a contact ion pair (CIP). In CH3CN the fragmentation is accompanied by aromatic nitration (radical collapse). In this solvent, the p-methoxycumyl cations produced by cleavage reaction undergo trinitromethylation at the CIP stage, but cumyl cations produced by thermal oxidation of the cumyl radicals are trapped by 4- at the solvent-separated ion pair stage. In CH2Cl2, 1b-c.+ undergo exclusively fragmentation, completely within the solvent cage. The cleavage of 1d-e.+ is much slower, and the radical cations undergo instead aromatic trinitromethylations. The observed substituent effect on the rate of cleavage (p+ = -2.2) indicates significant charge transfer across the scissile bond in the transition state for this process. The products of these reactions are predominantly derived from ion annihilation. The radical coupling processes are limited to radical cation/radical collapse that lead to nitrated products.

  DOI：

  10.1021/jo00313a021
• 作为产物：
  描述：

  4-异丙基苯酚 在 二叔丁基过氧化物 作用下， 生成 4-methoxy-4'-cyanobicumene
  参考文献：
  名称：

  Photochemically generated ion and radical pairs. Self-destructive charge-transfer complexes

  摘要：

  Irradiation of CT complexes between 4-methoxy-4'-X-bicumenes, 1a-e (X = H, a; OMe, b; Me, c, CF3, d, CN, e) and tetranitromethane (2) results in efficient generation of radical and ion pairs (phi-almost-equal-to 0.20). The identity of the final products depends on the dynamics of these pairs, which in turn is dramatically influenced by substitution and solvent. In all cases, 2.- dissociates rapidly ( < 3 ps) into (NO2)C-3(-) (4-) and NO2.. In CH2Cl2, 1a.+ reacts with 4- (aromatic trinitromethylation) and undergoes C-C bond fragmentation before diffusional separation of fragments can occur. Thus, a tetrad of reactive intermediates (cumyl radical, NO2., p-methoxycumyl cation and 4-) are produced in a single solvent cage. The cumyl radical is oxidized by 2, and both cumyl cations undergo alpha-trinitromethylation. The cumyl cations undergo trinitromethylation in the original solvent cage which is kinetically equivalent to a contact ion pair (CIP). In CH3CN the fragmentation is accompanied by aromatic nitration (radical collapse). In this solvent, the p-methoxycumyl cations produced by cleavage reaction undergo trinitromethylation at the CIP stage, but cumyl cations produced by thermal oxidation of the cumyl radicals are trapped by 4- at the solvent-separated ion pair stage. In CH2Cl2, 1b-c.+ undergo exclusively fragmentation, completely within the solvent cage. The cleavage of 1d-e.+ is much slower, and the radical cations undergo instead aromatic trinitromethylations. The observed substituent effect on the rate of cleavage (p+ = -2.2) indicates significant charge transfer across the scissile bond in the transition state for this process. The products of these reactions are predominantly derived from ion annihilation. The radical coupling processes are limited to radical cation/radical collapse that lead to nitrated products.

  DOI：

  10.1021/jo00313a021

文献信息

• Dicyanobenzene sensitized carbon-carbon bond cleavage in methoxybicumenes. Products and mechanistic studies
  作者：Przemyslaw Maslak、William H. Chapman

  DOI：10.1016/s0040-4020(01)88366-6

  日期：1990.1

  Radical cations of p-methoxy-p-X-bicumenes generated by ET to excited-state dicyanobenzene undergo rapid irreversible C-C bond scission giving cumyl cations and radicals. The photoefficiency of the process (Φ = 0.13 for X = MeO, Φ< 0.005 for X = CN) and the fate of the radicals produced depends strongly on substitution.

  由ET生成的对甲氧基-pX-双碳二烯的自由基阳离子到激发态的二氰基苯经历快速不可逆的CC键断裂，产生枯基阳离子和自由基。该过程的光效率（对于X = MeO，Φ= 0.13；对于对于X = CN，Φ<0.005）和产生的自由基的命运在很大程度上取决于取代。
• MASLAK, PRZEMYSLAW;CHAPMAN, WILLIAM H. (JR), J. ORG. CHEM., 55,(1990) N6, C. 6334-6347
  作者：MASLAK, PRZEMYSLAW、CHAPMAN, WILLIAM H. (JR)

  DOI：——

  日期：——
• MASLAK, PRZEMYSLAW;CHAPMAN, WILLIAM H. (JR), TETRAHEDRON, 46,(1990) N, C. 2715-2724
  作者：MASLAK, PRZEMYSLAW、CHAPMAN, WILLIAM H. (JR)

  DOI：——

  日期：——