Ethyl 9-oxo-9H-xanthene-2-carboxylate | 256378-02-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并吡喃
• 英文名称: Ethyl 9-oxo-9H-xanthene-2-carboxylate
• 英文别名: 2-ethoxycarbonyl-9H-xanthen-9-one；9-oxo-xanthene-2-carboxylic acid ethyl ester；9-Oxo-xanthen-2-carbonsaeure-aethylester；Ethyl 9-oxoxanthene-2-carboxylate
• CAS: 256378-02-6
• 化学式: C₁₆H₁₂O₄
• 分子量: 268.269
• InChiKey: VBXRVQVZTGLOBK-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.8
• 重原子数：
  20
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.12
• 拓扑面积：
  52.6
• 氢给体数：
  0
• 氢受体数：
  4

反应信息

• 作为产物：
  描述：

  ethyl 2-methylbuta-2,3-dienoate 在 三丁基膦 、 2,3-二氯-5,6-二氰基-1,4-苯醌 作用下， 以 二氯甲烷 、 邻二氯苯 为溶剂， 反应 0.17h， 生成 Ethyl 9-oxo-9H-xanthene-2-carboxylate
  参考文献：
  名称：

  Natural Product Biosynthesis Inspired Concise and Stereoselective Synthesis of Benzopyrones and Related Scaffolds

  摘要：

  A natural product biosynthesis-inspired strategy to explore biologically relevant chemical space is presented. A phosphine-catalyzed cascade and stereoselective annulation provides a common tricyclic benzopyrone intermediate that was efficiently transformed into diverse and related naturally occurring scaffolds.

  DOI：

  10.1021/ol200389p

文献信息

• Benzopyrans. Part 41. Reactions of 2-(2-dimethylaminovinyl)-1-benzopyran-4-ones with various dienophiles
  作者：Chandra Kanta Ghosh、Samita Bhattacharyya、Chandreyi Ghosh、Amarendra Patra

  DOI：10.1039/a903145f

  日期：——

  propiolate (EP) ultimately gives xanthenones 33, 34 and 37, respectively, the latter being admixed with flavone 43. Enamine 2, cyclisable to xanthenone 11, gives 33 and 35 with DMAD, and 37 and 44 with EP. Reaction of 3 with DMAD affords 36 exclusively.

  二烯胺1与N-苯基马来酰亚胺和色酮14以及15通过最初的[4 + 2]环加成反应分别产生黄酮酮10和18。最初对色酮14和16的迈克尔加成反应以及乙酰二羧酸二甲酯（DMAD）分别触发了氧杂酮19、4-氮杂蒽酮26和富马酸酯49的形成。二烯胺1–3与亲电子乙炔的初始[2 + 2]环加合物始终会经历进一步的转化。因此，具有DMAD的1，二苯甲酰基乙炔和丙酸乙酯（EP）最终分别产生黄酮酮33、34和37，后者与黄酮43混合。烯胺2，可环化为黄酮酮11，产生33和35的DMAD，以及37和37带EP的44。3与DMAD的反应仅得到36。
• Direct Excitation of Aldehyde to Activate the C( <i>sp</i> ^<i>2</i> )−H Bond by Cobaloxime Catalysis toward Fluorenones Synthesis with Hydrogen Evolution
  作者：Jia‐Dong Guo、Ya‐Jing Chen、Chen‐Hong Wang、Qiao He、Xiu‐Long Yang、Tian‐Yu Ding、Ke Zhang、Rui‐Nan Ci、Bin Chen、Chen‐Ho Tung、Li‐Zhu Wu

  DOI：10.1002/anie.202214944

  日期：2023.2.6

  highly reactive photoexcited triplet state of aromatic aldehyde intermediates is intercepted by the catalyst in the ground state, thus leading to the synthesis of a series of fluorenones, xanthones and thioxanthones in good to excellent yields without any external oxidants and with hydrogen as the byproduct.

  已经成功开发了通过钴肟催化直接激发醛以激活其 C ( sp 2 )-H 键。在照射下，芳香醛中间体的高反应性光激发三重态被基态催化剂拦截，从而导致在没有任何外部氧化剂和氢作为副产品。
• Synthesis of Thioxanthone 10,10-Dioxides and Sulfone-Fluoresceins via Pd-Catalyzed Sulfonylative Homocoupling
  作者：Gergely Knorr、Mariano L. Bossi、Alexey N. Butkevich、Stefan W. Hell

  DOI：10.1021/acs.orglett.3c04300

  日期：2024.2.2

  Our report describes the facile and scalable preparation of 9H-thioxanthen-9-one 10,10-dioxides via Pd-catalyzed sulfonylative homocoupling of the appropriately substituted benzophenones. This transformation provides a straightforward route to previously unreported sulfone-fluoresceins and -fluorones. Several examples of these red fluorescent dyes have been prepared, characterized, and evaluated as

  我们的报告描述了通过适当取代的二苯甲酮的 Pd 催化磺酰化自偶联来轻松且可规模化地制备 9 H-噻吨-9-酮 10,10-二氧化物。这种转化为以前未报道的砜荧光素和荧光酮提供了一条直接的途径。这些红色荧光染料的几个例子已经被制备、表征和评估为与具有 775 nm 受激发射损耗的超分辨率荧光显微镜兼容的活细胞渗透标记。
• Rhodium-Catalyzed Xanthone Formation from 2-Aryloxybenzaldehydes via Cross-Dehydrogenative Coupling (CDC)
  作者：Ping Wang、Honghua Rao、Ruimao Hua、Chao-Jun Li

  DOI：10.1021/ol203381q

  日期：2012.2.3

  A concise and straightforward strategy to construct a xanthone skeleton via an intramolecular cross-dehydrogenative coupling (CDC) of 2-aryloxybenzaldehydes has been developed. The reaction proceeded smoothly without any need of preactivation of the aldehyde group. It can tolerate various functional groups and provides an applicable protocol to construct a wide range of xanthone derivatives.
• Anschuetz; Stoltenhoff; Voeller, Chemische Berichte, 1925, vol. 58, p. 1738
  作者：Anschuetz、Stoltenhoff、Voeller

  DOI：——

  日期：——