(E)-methyl 2-diazo-4-(3,4-dimethoxyphenyl)but-3-enoate | 888223-21-0

• 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: (E)-methyl 2-diazo-4-(3,4-dimethoxyphenyl)but-3-enoate
• CAS: 888223-21-0
• 化学式: C₁₃H₁₄N₂O₄
• 分子量: 262.265
• InChiKey: CJIZSOYLZKCQOX-GQCTYLIASA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.56
• 重原子数：
  19.0
• 可旋转键数：
  5.0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.23
• 拓扑面积：
  81.16
• 氢给体数：
  0.0
• 氢受体数：
  4.0

反应信息

• 作为反应物：
  描述：

  (E)-methyl 2-diazo-4-(3,4-dimethoxyphenyl)but-3-enoate 、 3,4-dihydronaphthalen-1-yl acetate 在 dirhodium (S)-tetrakis(N-(dodecylbenzenesulfonyl)prolinate) 作用下， 以 正己烷 、 甲苯 为溶剂， 以92%的产率得到(S,E)-methyl 4-(3,4-dimethoxyphenyl)-4-(naphthalen-5-yl)but-2-enoate
  参考文献：
  名称：

  Direct synthesis of methyl 2-diazo-4-aryl-3-butenoates and their application to the enantioselective synthesis of 4-aryl-4-(1-naphthyl)-2-butenoates

  摘要：

  An improved one-flask synthesis of various methyl 2-diazo-4-aryl and 4-heteroaryl-3-butenoates, precursors to donor/ acceptor Substituted carbenoids, is described. Their Rh-2(S-DOSP)(4) catalyzed reaction with 1-acetoxy-3,4-diliydronaphthalene, via a combined C-H activation/Cope rearrangement pathway followed by elimination of acetic acid affords a highly enantioselective (98-99% ee) entry to methyl 4-aryl- and 4-heteroaryl-4-(1-naphthyl)-2-butenoates. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2006.01.023
• 作为产物：
  描述：

  (E)-4-(3,4-Dimethoxy-phenyl)-but-3-enoic acid methyl ester 在 4-乙酰氨基苯磺酰叠氮 、 1,8-二氮杂双环[5.4.0]十一碳-7-烯 作用下， 以 四氢呋喃 为溶剂， 反应 2.0h， 以0.825 g的产率得到(E)-methyl 2-diazo-4-(3,4-dimethoxyphenyl)but-3-enoate
  参考文献：
  名称：

  Direct synthesis of methyl 2-diazo-4-aryl-3-butenoates and their application to the enantioselective synthesis of 4-aryl-4-(1-naphthyl)-2-butenoates

  摘要：

  An improved one-flask synthesis of various methyl 2-diazo-4-aryl and 4-heteroaryl-3-butenoates, precursors to donor/ acceptor Substituted carbenoids, is described. Their Rh-2(S-DOSP)(4) catalyzed reaction with 1-acetoxy-3,4-diliydronaphthalene, via a combined C-H activation/Cope rearrangement pathway followed by elimination of acetic acid affords a highly enantioselective (98-99% ee) entry to methyl 4-aryl- and 4-heteroaryl-4-(1-naphthyl)-2-butenoates. (c) 2006 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2006.01.023

文献信息

• <i>D</i>₂-Symmetric Dirhodium Catalyst Derived from a 1,2,2-Triarylcyclopropanecarboxylate Ligand: Design, Synthesis and Application
  作者：Changming Qin、Vyacheslav Boyarskikh、Jørn H. Hansen、Kenneth I. Hardcastle、Djamaladdin G. Musaev、Huw M. L. Davies

  DOI：10.1021/ja2074104

  日期：2011.11.30

  Dirhodium tetrakis-(R)-(1-(4-bromophenyl)-2,2-diphenylcyclopropanecarboxylate) (Rh-2(R-BTPCP)(4)) was found to be an effective chiral catalyst for enantioselective reactions of aryl- and styryldiazoacetates. Highly enantioselective cyclopropanations, tandem cyclopropanation/Cope rearrangements and a combined C- functionalization/Cope rearrangement were achieved using Rh-2(R-BTPCP)(4) as catalyst. The advantages of Rh-2(R-BTPCP)(4) include its ease of synthesis, its tolerance to the size of the ester group in the styryldiazoacetates, and its compatibility with clichloromethane as solvent. Computational studies suggest that the catalyst adopts a D-2-symmetric arrangement, but when the carbenoid binds to the catalyst, two of the p-bromophenyl groups on the ligands rotate outward to make room for the carbenoid and the approach of the substrate to the carbenoid.