4,4-dimethyl-2-cyclopenten-1-yl acetate | 155251-19-7

• 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: 4,4-dimethyl-2-cyclopenten-1-yl acetate
• 英文别名: (4,4-Dimethylcyclopent-2-en-1-yl) acetate
• CAS: 155251-19-7
• 化学式: C₉H₁₄O₂
• 分子量: 154.209
• InChiKey: TTZPRDCHXACCSM-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  11
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.67
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  4,4-dimethyl-2-cyclopenten-1-yl acetate 在 Pd(PPh3) 氧气 、 manganese triacetate 、 1,4-双(二苯基膦)丁烷 作用下， 以 四氢呋喃 、 甲醇 为溶剂， 反应 50.0h， 生成 methyl 2-(3-hydroxy-4,4-dimethylcyclopenten-1-yl)-2-oxoacetate
  参考文献：
  名称：

  基于锰（III）的α-烯丙基-β-酮酸酯与分子氧的氧化自由基反应

  摘要：

  α-烯丙基-β-酮酯5与Mn（OAc）3 ·2H 2 O的氧化反应以良好的收率得到δ-羟基-β-，γ-不饱和-α-酮酯6。讨论了该反应的机理。

  DOI：

  10.1016/s0040-4039(00)61371-0
• 作为产物：
  描述：

  4,4-二甲基环戊-2-烯-1-醇 、 乙酸酐 在 吡啶 作用下， 反应 20.0h， 生成 4,4-dimethyl-2-cyclopenten-1-yl acetate
  参考文献：
  名称：

  Ozonolyses of 4,4-Dimethyl-2-cyclohexen-1-yl Acetate and 4,4-Dimethyl-2-cyclopenten-1-yl Acetate. Competition between the Steric Effects of the Allylic Methyl Groups and the Electronic Effects of the Acetoxy Group on the Direction of Cleavage of the Primary Ozonides

  摘要：

  In order to understand the relative directing effects of the substituent steric and electronic effects on the cleavage of the primary ozonides, ozonolyses of a series of cyclohexene and cyclopentene derivatives were conducted in methanol or in ether in the presence of trifluoroacetophenone. The ozonolysis of 4,4-dimethyl-2-cyclohexen-1-yl acetate (1k) in methanol provided exclusively the alpha-methoxyalkyl hydroperoxide 7k derived from capture of 5-acetoxy-5-formyl-2,2-dimethylpentanal oxide by the solvent, while in the case of the relevant 4,4-dimethyl-2-cyclopenten-1-yl acetate (1l) the solvent-captured product 6l derived from trapping of 2-acetoxy-5-formyl-5-methylpentanal oxide was the major product. The remarkable difference in the regiochemistry of the fragmentation between the primary ozonides, 2k and 2l, is rationalized in terms of the significant difference in the steric congestion.

  DOI：

  10.1021/jo960219p

文献信息

• Manganese(III)-based oxidative free-radical reaction of α-allyl-β-keto ester with molecular oxygen
  作者：Takashi Ohshima、Mikiko Sodeoka、Masakatsu Shibasaki

  DOI：10.1016/s0040-4039(00)61371-0

  日期：1993.1

  Oxidative reactions of α-allyl-β-keto esters 5 with Mn(OAc)3·2H2O give the δ-hydroxy-β-,γ-unsaturated-α-keto esters 6 in good yields. The mechanism of this reaction is discussed.

  α-烯丙基-β-酮酯5与Mn（OAc）3 ·2H 2 O的氧化反应以良好的收率得到δ-羟基-β-，γ-不饱和-α-酮酯6。讨论了该反应的机理。
• Ozonolyses of 4,4-Dimethyl-2-cyclohexen-1-yl Acetate and 4,4-Dimethyl-2-cyclopenten-1-yl Acetate. Competition between the Steric Effects of the Allylic Methyl Groups and the Electronic Effects of the Acetoxy Group on the Direction of Cleavage of the Primary Ozonides
  作者：Shin-ichi Kawamura、Hideyuki Yamakoshi、Masatomo Nojima

  DOI：10.1021/jo960219p

  日期：1996.1.1

  In order to understand the relative directing effects of the substituent steric and electronic effects on the cleavage of the primary ozonides, ozonolyses of a series of cyclohexene and cyclopentene derivatives were conducted in methanol or in ether in the presence of trifluoroacetophenone. The ozonolysis of 4,4-dimethyl-2-cyclohexen-1-yl acetate (1k) in methanol provided exclusively the alpha-methoxyalkyl hydroperoxide 7k derived from capture of 5-acetoxy-5-formyl-2,2-dimethylpentanal oxide by the solvent, while in the case of the relevant 4,4-dimethyl-2-cyclopenten-1-yl acetate (1l) the solvent-captured product 6l derived from trapping of 2-acetoxy-5-formyl-5-methylpentanal oxide was the major product. The remarkable difference in the regiochemistry of the fragmentation between the primary ozonides, 2k and 2l, is rationalized in terms of the significant difference in the steric congestion.