6,7-bis(3,4-dimethoxyphenyl)-2,3-dihydroindolizin-5(1H)-one | 156424-91-8

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡啶及其衍生物
• 英文名称: 6,7-bis(3,4-dimethoxyphenyl)-2,3-dihydroindolizin-5(1H)-one
• 英文别名: 6,7-bis(3,4-dimethoxyphenyl)-2,3-dihydro-1H-indolizin-5-one
• CAS: 156424-91-8
• 化学式: C₂₄H₂₅NO₅
• 分子量: 407.466
• InChiKey: UJFYHTDPHXBYQD-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.16
• 重原子数：
  30.0
• 可旋转键数：
  6.0
• 环数：
  4.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  58.92
• 氢给体数：
  0.0
• 氢受体数：
  6.0

反应信息

• 作为反应物：
  描述：

  6,7-bis(3,4-dimethoxyphenyl)-2,3-dihydroindolizin-5(1H)-one 在 aluminum (III) chloride 、 lithium aluminium tetrahydride 作用下， 以 四氢呋喃 为溶剂， 反应 18.0h， 以76%的产率得到(+/-)-septicine
  参考文献：
  名称：

  一种通用的Cp * CoIII催化的分子内C-H活化方法，可有效地合成香霉素，原小T碱和触毛生物碱

  摘要：

  在此，我们报告Cp * Co III催化的C H活化方法是创建高度有价值的异喹诺酮和吡啶酮的重要步骤，这些异喹啉酮和吡啶酮可以轻松地用于各种芳香族素，原小ber碱和tylophora生物碱的总合成。这种特殊的CH活化/环化反应是通过多个末端以及内部炔烃偶联伙伴实现的，具有广泛的应用范围和出色的官能团耐受性。本文报道的该方案的合成适用性已在两个Topo-I-抑制剂和两个8-氧代小ber碱核心的合成中得到了证明，这些核心可进一步制成四氢小ber碱和原小ber碱生物碱。此外，这些构件也以方便的方式转化为六种不同的tylophora生物碱。

  DOI：

  10.1002/chem.201702648
• 作为产物：
  描述：

  3,4-dimethoxypropynoic acid chloride 在 4-二甲氨基吡啶 、 potassium fluoride 、 1,3-双(2,6-二-异丙基苯基)咪唑-2-亚基金(I)氯化物 、 氢碘酸 、 silver trifluoromethanesulfonate 、 palladium diacetate 、 三乙胺 、 亚硝酸异戊酯 作用下， 以 甲醇 、 二氯甲烷 、 水 、 1,2-二氯乙烷 为溶剂， 反应 12.33h， 生成 6,7-bis(3,4-dimethoxyphenyl)-2,3-dihydroindolizin-5(1H)-one
  参考文献：
  名称：

  金 (I)-催化加氢胺化/环异构化级联：(±)-seco-Antofine 和 (±)-Septicine 的简明合成

  摘要：

  通过金催化串联加氢胺化/环异构化级联，详细阐述了合成高度官能化的 N-杂环 1,6-环 2-吡啶酮和 2,3-环 4-嘧啶酮的简洁而灵活的程序。这种新颖且高效的方法允许从现成的构建块开始快速构建这些不同的 N-杂环支架，并显示出广泛的范围和良好的官能团耐受性。(±)-seco-antofine 和 (±)-septine 的全合成是采用这种策略实现的。

  DOI：

  10.1021/acs.orglett.0c03062

文献信息

• A General Cp*Co^III-Catalyzed Intramolecular C−H Activation Approach for the Efficient Total Syntheses of Aromathecin, Protoberberine, and Tylophora Alkaloids
  作者：Andreas Lerchen、Tobias Knecht、Maximilian Koy、Constantin G. Daniliuc、Frank Glorius

  DOI：10.1002/chem.201702648

  日期：2017.9.7

  Herein, we report a Cp*CoIII‐catalyzed C−H activation approach as the key step to create highly valuable isoquinolones and pyridones as building blocks that can readily be applied in the total syntheses of a variety of aromathecin, protoberberine, and tylophora alkaloids. This particular C−H activation/annulation reaction was achieved with several terminal as well as internal alkyne coupling partners

  在此，我们报告Cp * Co III催化的C H活化方法是创建高度有价值的异喹诺酮和吡啶酮的重要步骤，这些异喹啉酮和吡啶酮可以轻松地用于各种芳香族素，原小ber碱和tylophora生物碱的总合成。这种特殊的CH活化/环化反应是通过多个末端以及内部炔烃偶联伙伴实现的，具有广泛的应用范围和出色的官能团耐受性。本文报道的该方案的合成适用性已在两个Topo-I-抑制剂和两个8-氧代小ber碱核心的合成中得到了证明，这些核心可进一步制成四氢小ber碱和原小ber碱生物碱。此外，这些构件也以方便的方式转化为六种不同的tylophora生物碱。
• Rhodium(III)-Catalyzed Intramolecular Annulation through CH Activation: Total Synthesis of (±)-Antofine, (±)-Septicine, (±)-Tylophorine, and Rosettacin
  作者：Xianxiu Xu、Yu Liu、Cheol-Min Park

  DOI：10.1002/anie.201204970

  日期：2012.9.10

  Annulation: The efficient synthesis of 3‐hydroxyalkyl isoquinolones and 6‐hydroxyalkyl 2‐pyridones is enabled through the intramolecular annulation of alkyne‐tethered hydroxamic esters (see scheme, Cp*=pentamethylcyclopentadienyl). The reaction features high regioselectivity, broad substrate scope, and excellent functional‐group tolerance, proceeds under mild reaction conditions with low catalyst loading

  注释：通过炔烃系异羟肟酸酯的分子内环化，可实现3-羟基烷基异喹诺酮和6-羟基烷基2-吡啶酮的高效合成（参见方案，Cp * =五甲基环戊二烯基）。该反应具有较高的区域选择性，广泛的底物范围和出色的官能团耐受性，可在温和的反应条件下以较低的催化剂负载量进行，并且无需外部氧化剂。
• An Isomünchnone-Based Method for the Synthesis of Highly Substituted 2(1<i>H</i>)-Pyridones
  作者：Albert Padwa、Scott M. Sheehan、Christopher S. Straub

  DOI：10.1021/jo9911600

  日期：1999.11.1

  1-(Benzenesulfonyl-diazoacetyl)-pyrrolidin-2-one was prepared by a diazo transfer of 1-(benzenesulfonylacetyl)-pyrrolidin-2-one with p-acetamidobenzenesulfonyl azide and triethylamine. Treatment; of the diazoimide with a catalytic quantity of rhodium(II) acetate resulted in the formation of an isomunchnone dipole, which underwent bimolecular trapping with various dipolarophiles in high yield. The initially formed cycloadducts were not isolable or observed, as they all readily underwent ring opening to give the 3-hydroxy-2(1H)-pyridone ring system. The 3-hydroxy-2(1H)-pyridones were readily converted to the corresponding triflates, which function as suitable substrates in various types of palladium-catalyzed cross-coupling reactions. Commercial tetrakis(triphenylphoshine)palladium was found to be a particularly effective catalyst for the cross-coupling with aryl, vinyl, and acetylenic partners. An application of the method to the synthesis of the indolizidine alkaloid (+/-)-ipalbidine was carried out in eight steps in 17% overall yield. The angiotensin-converting enzyme inhibitor (-)-A58365A was also synthesized by a process based on the [3 + 2]-cycloaddition reaction of a phenylsulfonyl substituted isomunchnone intermediate. The starting material for this process was prepared from L-pyroglutamic acid and involved using a diazo phenylsulfonyl substituted pyrrolidine imide. Treatment of the diazoimide with Rh-2(OAc)(4) in the presence of methyl vinyl ketone afforded a 3-hydroxy-2-pyridone derivative, which was subsequently converted to the ACE inhibitor in six additional steps.
• Synthesis of (±)-septicine
  作者：Benjamin R. Yerxa、Kevin Yang、Harold W. Moore

  DOI：10.1016/s0040-4020(01)80639-6

  日期：1994.1

  The total synthesis of the indolizidine alkaloid, (+/-)-septicine (5) (27% overall yield) in 8 steps from dimethyl squarate is presented. The key step of the synthesis involves the ring expansion of 2,3-bis-(3,4-dimethoxyphenyl)-4-(1-pyrrolo)cyclobutenone 12 to the corresponding indolizine-5,8-dione 6. The synthesis is highly convergent and thus could be used for the synthesis of a variety of analogs.
• A Gold(I)-Catalyzed Hydroamination/Cycloisomerization Cascade: Concise Synthesis of (±)-seco-Antofine and (±)-Septicine
  作者：Guilong Tian、Liangliang Song、Zhenghua Li、Koen Robeyns、Luc Van Meervelt、Erik V. Van der Eycken

  DOI：10.1021/acs.orglett.0c03062

  日期：2020.11.6

  procedure for the synthesis of highly functionalized N-heterocyclic 1,6-annulated 2-pyridones and 2,3-annulated 4-pyrimidinones has been elaborated through a gold-catalyzed tandem hydroamination/cycloisomerization cascade. This novel and highly efficient method allows the rapid construction of these diverse N-heterocyclic scaffolds starting from readily available building blocks, and shows a wide scope

  通过金催化串联加氢胺化/环异构化级联，详细阐述了合成高度官能化的 N-杂环 1,6-环 2-吡啶酮和 2,3-环 4-嘧啶酮的简洁而灵活的程序。这种新颖且高效的方法允许从现成的构建块开始快速构建这些不同的 N-杂环支架，并显示出广泛的范围和良好的官能团耐受性。(±)-seco-antofine 和 (±)-septine 的全合成是采用这种策略实现的。