methyl 2-(5-oxo-1-hexynyl)benzoate | 133446-37-4

• 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: methyl 2-(5-oxo-1-hexynyl)benzoate
• 英文别名: Methyl 2-(5-oxohex-1-ynyl)benzoate
• CAS: 133446-37-4
• 化学式: C₁₄H₁₄O₃
• 分子量: 230.263
• InChiKey: MICAGCXJFLTDLL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.7
• 重原子数：
  17
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  methyl 2-(5-oxo-1-hexynyl)benzoate 在 sodium tetrahydroborate 作用下， 以 甲醇 为溶剂， 反应 2.0h， 以93%的产率得到methyl 2-(5-hydroxyhex-1-yn-1-yl)benzoate
  参考文献：
  名称：

  Rhodium(II)-catalyzed cyclization reactions of alkynyl-substituted .alpha.-diazo ketones

  摘要：

  Treatment of several omicron-alkynl-substituted alpha-diazoacetophenone derivatives with rhodium (II) carboxylates results in the formation of substituted indenones. The simplest mechanism accounting for the results involves addition of a rhodium-stabilized carbenoid onto the acetylenic pi-bond to generate a vinyl carbenoid directly of possibly a highly strained cyclopropene derivative. The vinyl carbenoid was found to undergo addition to a neighboring alkene tethered on the side chain to give an indenyl-substituted bicyclo[3.1.0]hexane derivative. A number of related systems were examined so as to probe the scope and generality of the process. Treatment of omicron-(6,8-nonadien-1-ynyl)-alpha-diazoacetophenone with rhodium (II) mandelate afforded a cyclopent[g]azulenone derivative. The formation of this compound involves a divinylcyclopropane intermediate that readily undergoes a Cope rearrangement under the reaction conditions. The rhodium-catalyzed reaction of 2-(6-oxo-1-hepty-nyl)-alpha-diazoacetophenone in the presence of N-phenylmaleimide afforded a mixture of two cycloadducts. One of the products can be accounted for in terms of a cyclization of the vinyl carbenoid onto the oxygen atom of the neighboring carbonyl group to give a resonance-stabilized dipole. 1,3-Dipolar cycloaddition of the carbonyl ylide across the activated pi-bond of N-phenylmaleimide affords the observed product. The second cycloadduct is formed by a 1,2-hydrogen shift of the initially produced vinyl carbenoid. The resulting diene undergoes a subsequent Diels-Alder reactions with N-phenylmaleimide.

  DOI：

  10.1021/jo00007a047
• 作为产物：
  描述：

  邻溴苯甲酸甲酯 在 copper(l) iodide 、 bis(triphenylphosphine)palladium(II)-chloride 、 三苯基膦 4-甲基苯磺酸吡啶 、 三乙胺 作用下， 以 水 、 丙酮 为溶剂， 反应 49.0h， 生成 methyl 2-(5-oxo-1-hexynyl)benzoate
  参考文献：
  名称：

  Rhodium(II)-catalyzed cyclization reactions of alkynyl-substituted .alpha.-diazo ketones

  摘要：

  Treatment of several omicron-alkynl-substituted alpha-diazoacetophenone derivatives with rhodium (II) carboxylates results in the formation of substituted indenones. The simplest mechanism accounting for the results involves addition of a rhodium-stabilized carbenoid onto the acetylenic pi-bond to generate a vinyl carbenoid directly of possibly a highly strained cyclopropene derivative. The vinyl carbenoid was found to undergo addition to a neighboring alkene tethered on the side chain to give an indenyl-substituted bicyclo[3.1.0]hexane derivative. A number of related systems were examined so as to probe the scope and generality of the process. Treatment of omicron-(6,8-nonadien-1-ynyl)-alpha-diazoacetophenone with rhodium (II) mandelate afforded a cyclopent[g]azulenone derivative. The formation of this compound involves a divinylcyclopropane intermediate that readily undergoes a Cope rearrangement under the reaction conditions. The rhodium-catalyzed reaction of 2-(6-oxo-1-hepty-nyl)-alpha-diazoacetophenone in the presence of N-phenylmaleimide afforded a mixture of two cycloadducts. One of the products can be accounted for in terms of a cyclization of the vinyl carbenoid onto the oxygen atom of the neighboring carbonyl group to give a resonance-stabilized dipole. 1,3-Dipolar cycloaddition of the carbonyl ylide across the activated pi-bond of N-phenylmaleimide affords the observed product. The second cycloadduct is formed by a 1,2-hydrogen shift of the initially produced vinyl carbenoid. The resulting diene undergoes a subsequent Diels-Alder reactions with N-phenylmaleimide.

  DOI：

  10.1021/jo00007a047

文献信息

• A Tandem Cyclization-Onium Ylide Rearrangement-Cycloaddition Sequence for the Synthesis of Benzo-Substituted Cyclopentenones
  作者：Albert Padwa、Jamal M. Kassir、Mark A. Semones、M. David Weingarten

  DOI：10.1021/jo00106a014

  日期：1995.1

  A new annulation sequence leading to benzo-substituted cyclopentenones is effected by treating o-alkynyl-substituted alpha-diazoacetophenones containing tethered heteroatoms with Rh(II) carboxylates. The reaction involves addition of the initially formed keto carbenoid onto the acetylenic pi-bond to give a rearranged vinyl carbenoid. Sulfonium ylide formation occurred both intra- and intermolecularly when the reaction was carried out in the presence of a sulfide. In the case where an ether oxygen was present on the backbone of the vinyl carbenoid, the resulting oxonium ylide underwent a [1,2]- or [2,3]-shift to give the rearranged product. These cyclic metallocarbenoids were also found to interact with a neighboring carbonyl or oximino pi-bond to produce carbonyl or azomethine ylides. The 1,3-dipoles generated in this manner were trapped with dimethyl acetylenedicarboxylate. The domino transformation was also performed intramolecularly by attaching a trapping agent directly to the carbonyl group. Incorporation of an amido carbonyl on the alkyne side chain was found to dramatically alter the course of the tandem annulation reaction. A novel rearranged cycloadduct was formed in high yield whose structure was elucidated by X-ray crystallography. The mechanism for its formation involves the opening of a transient intermediate oxabicyclo[2.2.1]heptane followed by a Wagner-Meerwein rearrangement.
• PADWA, ALBERT;KRUMPE, KEITH E.;GAREAU, YVES;CHIACCHIO, UGO, J. ORG. CHEM., 56,(1991) N, C. 2523-2530
  作者：PADWA, ALBERT、KRUMPE, KEITH E.、GAREAU, YVES、CHIACCHIO, UGO

  DOI：——

  日期：——