4,5-dimethoxy-2-(trimethylsilyl)benzaldehyde | 169563-55-7

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: 4,5-dimethoxy-2-(trimethylsilyl)benzaldehyde
• 英文别名: 4,5-Dimethoxy-2-trimethylsilylbenzaldehyde
• CAS: 169563-55-7
• 化学式: C₁₂H₁₈O₃Si
• 分子量: 238.359
• InChiKey: ZYPZZGSCDPWZEI-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.06
• 重原子数：
  16
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.42
• 拓扑面积：
  35.5
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  4,5-dimethoxy-2-(trimethylsilyl)benzaldehyde 在 重铬酸吡啶 、 4 A molecular sieve 作用下， 以 四氢呋喃 、 正己烷 、 二氯甲烷 为溶剂， 反应 3.0h， 生成 4-Acetyl-5-(trimethylsilyl)veratrole
  参考文献：
  名称：

  A Highly Enantiocontrolled Strategy for the Synthesis of Benzylic Quaternary Carbon Centers. A Formal Total Synthesis of (-)-Mesembrine

  摘要：

  A remarkable substituent effect by a trimethylsilyl group was observed on the enantioselectivity of the tandem asymmetric epoxidation and enantiospecific ring expansion of 2-cyclopropylidene-2-(4,5-dimethoxy-2-(trimethylsiyl)phenyl)ethanol (24), affording (S)-(-)-2-(4,5-dimethoxy)-2-(trimethylsilyl)phenyl-2-(hydroxymethyl)cyclobutanone (25) in high enantiomeric excess. This feature enabled us to accomplish a concise and highly enantioselective total synthesis of(-)-mesembrine (1), providing a new and general strategy for the enantioselective synthesis of benzylic quaternary carbon centers.

  DOI：

  10.1021/jo00126a030
• 作为产物：
  描述：

  2-(2-bromo-4,5-dimethoxyphenyl)-1,3-dioxolane 在 sodium methylate 、 对甲苯磺酸 作用下， 生成 4,5-dimethoxy-2-(trimethylsilyl)benzaldehyde
  参考文献：
  名称：

  Oxidative Intramolecular Phenolic Coupling Reaction Induced by a Hypervalent Iodine(III) Reagent:  Leading to Galanthamine-Type Amaryllidaceae Alkaloids

  摘要：

  By extending our oxidative phenol-coupling reactions using a hypervalent iodine(III) reagent, a versatile synthetic procedure for the galanthamine-type Amaryllidaceae alkaloids was accomplished. The first total synthesis of (+/-)-sanguinine and the total syntheses of (+/-)-galanthamine, (+/-)-narwedine, (+/-)-lycoramine, and (+/-)-norgalanthamine were also successfully carried out.

  DOI：

  10.1021/jo9807868

文献信息

• Synthesis of (−)-Lasubine(I) via a Planar Chiral [(η⁶-arene)Cr(CO)₃] Complex
  作者：Hassen Ratni、E. Peter Kündig

  DOI：10.1021/ol991158v

  日期：1999.12.1

  Key steps of the synthesis of the Lythracaea alkaloid (--)-lasubine(I) are the formation of an enantiopure planar chiral arylaldehyde tricarbonylchromium complex and highly diastereoselective aza-Diels-Alder cycloaddition and intramolecular radical cyclization reactions to afford a quinolizidinone intermediate. Ketone reduction, desilylation, and decomplexation yield the enantiomerically pure product

  合成柳草生物碱（-）-lasubine（I）的关键步骤是形成对映体纯的平面手性芳基醛三羰基铬络合物和高度非对映选择性的aza-Diels-Alder环加成反应以及分子内自由基环化反应，从而得到喹喔啉酮中间体。酮的还原，去甲硅烷基化和解配合生成对映体纯产物。
• Oxidative Intramolecular Phenolic Coupling Reaction Induced by a Hypervalent Iodine(III) Reagent:  Leading to Galanthamine-Type Amaryllidaceae Alkaloids
  作者：Yasuyuki Kita、Mitsuhiro Arisawa、Michiyo Gyoten、Makiko Nakajima、Ryuji Hamada、Hirofumi Tohma、Takeshi Takada

  DOI：10.1021/jo9807868

  日期：1998.9.1

  By extending our oxidative phenol-coupling reactions using a hypervalent iodine(III) reagent, a versatile synthetic procedure for the galanthamine-type Amaryllidaceae alkaloids was accomplished. The first total synthesis of (+/-)-sanguinine and the total syntheses of (+/-)-galanthamine, (+/-)-narwedine, (+/-)-lycoramine, and (+/-)-norgalanthamine were also successfully carried out.
• A Highly Enantiocontrolled Strategy for the Synthesis of Benzylic Quaternary Carbon Centers. A Formal Total Synthesis of (-)-Mesembrine
  作者：Hideo Nemoto、Tetsuro Tanabe、Keiichiro Fukumoto

  DOI：10.1021/jo00126a030

  日期：1995.10

  A remarkable substituent effect by a trimethylsilyl group was observed on the enantioselectivity of the tandem asymmetric epoxidation and enantiospecific ring expansion of 2-cyclopropylidene-2-(4,5-dimethoxy-2-(trimethylsiyl)phenyl)ethanol (24), affording (S)-(-)-2-(4,5-dimethoxy)-2-(trimethylsilyl)phenyl-2-(hydroxymethyl)cyclobutanone (25) in high enantiomeric excess. This feature enabled us to accomplish a concise and highly enantioselective total synthesis of(-)-mesembrine (1), providing a new and general strategy for the enantioselective synthesis of benzylic quaternary carbon centers.