5-isopropyl-5-phenyl-γ-butyrolactone | 134391-15-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酯类
• 英文名称: 5-isopropyl-5-phenyl-γ-butyrolactone
• 英文别名: 5-isopropyl-5-phenyldihydrofuran-2(3H)-one；5-Phenyl-5-propan-2-yloxolan-2-one
• CAS: 134391-15-4
• 化学式: C₁₃H₁₆O₂
• 分子量: 204.269
• InChiKey: BSRWTUHINVNRSN-UHFFFAOYSA-N

物化性质

• 沸点：
  339.6±31.0 °C(Predicted)
• 密度：
  1.069±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.9
• 重原子数：
  15
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.46
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  3-methyl-2-phenyl-1-butene 在 氢氧化钾 、 氢气 作用下， 反应 1.67h， 生成 5-isopropyl-5-phenyl-γ-butyrolactone
  参考文献：
  名称：

  Electronic and steric effects in the addition of electrophilic 1,3-dicarbonylalkyl radicals to styrenes

  摘要：

  The addition reactions of 1,3-dicarbonylalkyl radicals to ring-substituted styrenes have been kinetically investigated in MeOH and/or MeCN. It has been observed that the rate effect of ring substituents is nearly identical in the reactions of MeCOCHCOMe (1), MeOCOCHCOMe (2) and MeOCOCHCOOMe (4), the rho-value, in MeOH being -0.96, -1.01 and -1.06, respectively. Since the three radicals are relatively strong oxidants and have similar reduction potentials, an important contribution of the charge transfer structure RCOCHCORCH2CHAr.+ to the addition transition state is suggested. It has also be found that in the reactions of 1 and 4 with alpha-alkyl-substituted styrenes the rate of addition is strongly influenced by the nature of the alkyl group, decreasing in the order: Me > Et > (i)Pr > (t)Bu. The observed effects are much larger than those reported for the corresponding reactions of the nucleophilic cyclohexyl radical. It is suggested that the alpha-alkyl substituents exert an effect of steric inhibition of resonance thereby ring delocalization of the charge and/or unpaired electron in the transition state is significantly reduced. Delocalization may be more important in the reactions of 1 and 4 than in those of the cyclohexyl radical since it is possible that the former utilizes a transition state occurring later along the reaction coordinate and/or characterized by a larger extent of charge transfer.

  DOI：

  10.1021/jo00015a037

文献信息

• Electroreductive coupling of aromatic ketones, aldehydes, and aldimines with α,β-unsaturated esters: Synthesis of 5-aryl substituted γ-butyrolactones and lactams
  作者：Naoki Kise、Yusuke Hamada、Toshihiko Sakurai

  DOI：10.1016/j.tet.2017.01.013

  日期：2017.2

  The electroreductive intermolecular coupling of aromatic ketones and aldehydes with α,β-unsaturated esters in the presence of TMSCl gave the adducts as γ-trimethylsiloxy esters. The detrimethylsilylation of the adducts with TBAF afforded 5-aryl substituted γ-butyrolactones. The electroreductive coupling of N-(4-methoxyphenyl)-1-arylmethaneimines with methyl acrylate in the presence of TMSCl gave the

  在TMCSC1存在下，芳族酮和醛与α，β-不饱和酯的电还原分子间偶联产生加合物，为γ-三甲基甲硅烷氧基酯。用TBAF将加合物的三甲基甲硅烷基化得到5-芳基取代的γ-丁内酯。N的电耦合-（4-甲氧基苯基）-1-芳基亚甲基与TMSCl存在下的丙烯酸甲酯得到加合物，为4-芳基-4-（（4-甲氧基苯基）氨基）丁酸甲酯。通过用NaH环化并随后用CAN氧化，将加合物转化为5-芳基-γ-丁内酰胺。通过该方法由烟醛制备（±）-烟碱。在TMCSC1存在下，芳族酮和醛亚胺与丙烯腈的电还原偶联分别得到4-芳基-4-（三甲基甲硅烷氧基）丁腈和4-芳基-4-（（4-甲氧基苯基）氨基）丁腈。