3-isopropyl-5-(4-methoxyphenyl)-6,6-dimethyl-2-cyclohexen-1-one

• 分子结构分类: 有机化合物 - 脂质和类脂质分子 - 异戊烯醇脂质
• 英文名称: 3-isopropyl-5-(4-methoxyphenyl)-6,6-dimethyl-2-cyclohexen-1-one
• 英文别名: 5-(4-Methoxyphenyl)-6,6-dimethyl-3-propan-2-ylcyclohex-2-en-1-one
• 化学式: C₁₈H₂₄O₂
• 分子量: 272.387
• InChiKey: XYSSTHZDYOMZGI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.9
• 重原子数：
  20
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.5
• 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-甲基-2-丁酮 、 4-甲氧基苯甲醛 在 potassium tert-butylate 作用下， 以 四氢呋喃 为溶剂， 反应 12.0h， 以68%的产率得到3-isopropyl-5-(4-methoxyphenyl)-6,6-dimethyl-2-cyclohexen-1-one
  参考文献：
  名称：

  Revisiting [3 + 3] Route to 1,3-Cyclohexanedione Frameworks:  Hidden Aspect of Thermodynamically Controlled Enolates

  摘要：

  We have revisited the traditional consecutive Michael-Claisen [3 + 3] process (MC-[3 + 3]) promising the synthesis of a cyclohexane-1,3-dione derivatives from nonactivated simple ketones and enoates and evaluated its potential in modern organic synthesis. Twenty to thirty examples were demonstrated to be effective. The reactions exhibited remarkable regioselectivity with the Michael addition proceeding through nucleophilic attack by the more hindered site of the ketones without exception. The subsequent Claisen condensation resulted in the formation of carbon-carbon bonds between less hindered site of the ketones and acyl carbon of the enoates. The MC-[3 + 3] process described is useful for the synthesis of Taxol A-ring synthons in multigram quantities and for the synthesis of other six-membered carbocyclic compounds. A number of control experiments have been conducted to provide strong support for the mechanism of this MC-[3 + 3].

  DOI：

  10.1021/jo010325d

文献信息

• Zur Darstellung von 5-Aryl-2-cyclohexenonen
  作者：Bernard Unterhalt、Hans Jürgen Reinhold

  DOI：10.1002/ardp.19863190607

  日期：——

  Durch basekatalysierte Reaktion zwischen aromatischen Aldehyden und 3‐Methyl‐2‐butanon in wäßrig‐ethanolischer Lösung bei 70° konnten die 5‐Aryl‐3‐isopropyl‐6,6‐dimethyl‐2‐cyclohexenone 4a‐f dargestellt werden. Benzaldehyd und Butanon reagierten analog; zwei der vier möglichen, in schlechter Ausbeute anfallenden 5‐Aryl‐2‐cyclohexenone 6 waren als Oxime zu isolieren.

  Durch basekatalysierte Reaktion zwischenarotischen Aldehyden 和 3-Methyl-2-butanon in wäßrig-ethanolischer Lösung bei 70° konnten die 5-Aryl-3-isopropyl-6,6-dimethyl-2-cyclohexenone 4a-f dargestellt werden Benzaldehyd 和 Butanon reagierten 类似物；zwei der vier möglichen, in schlechter Ausbeute anfallenden 5-Aryl-2-cyclohexenone 6waren als Oxime zu isolieren。
• UNTERHALT, B.;REINHOLD, H. J., ARCH. PHARM., 1986, 319, N 6, 516-521
  作者：UNTERHALT, B.、REINHOLD, H. J.

  DOI：——

  日期：——
• Revisiting [3 + 3] Route to 1,3-Cyclohexanedione Frameworks:  Hidden Aspect of Thermodynamically Controlled Enolates
  作者：Teruhiko Ishikawa、Ryuichiro Kadoya、Masaki Arai、Haruka Takahashi、Yumi Kaisi、Tomohiro Mizuta、Kazusa Yoshikai、Seiki Saito

  DOI：10.1021/jo010325d

  日期：2001.11.1

  We have revisited the traditional consecutive Michael-Claisen [3 + 3] process (MC-[3 + 3]) promising the synthesis of a cyclohexane-1,3-dione derivatives from nonactivated simple ketones and enoates and evaluated its potential in modern organic synthesis. Twenty to thirty examples were demonstrated to be effective. The reactions exhibited remarkable regioselectivity with the Michael addition proceeding through nucleophilic attack by the more hindered site of the ketones without exception. The subsequent Claisen condensation resulted in the formation of carbon-carbon bonds between less hindered site of the ketones and acyl carbon of the enoates. The MC-[3 + 3] process described is useful for the synthesis of Taxol A-ring synthons in multigram quantities and for the synthesis of other six-membered carbocyclic compounds. A number of control experiments have been conducted to provide strong support for the mechanism of this MC-[3 + 3].