6,7,8-trimethoxy-3-methylisocoumarin | 24350-89-8

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 异香豆素及其衍生物
• 英文名称: 6,7,8-trimethoxy-3-methylisocoumarin
• 英文别名: 6,7,8-trimethoxy-3-methyl-isochromen-1-one；1H-2-Benzopyran-1-one, 6,7,8-trimethoxy-3-methyl-；6,7,8-trimethoxy-3-methylisochromen-1-one
• CAS: 24350-89-8
• 化学式: C₁₃H₁₄O₅
• 分子量: 250.251
• InChiKey: BGNQRUYYPMRSIG-UHFFFAOYSA-N

物化性质

• 熔点：
  119 °C
• 沸点：
  410.5±45.0 °C(Predicted)
• 密度：
  1.208±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  18
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  54
• 氢给体数：
  0
• 氢受体数：
  5

反应信息

• 作为反应物：
  描述：

  6,7,8-trimethoxy-3-methylisocoumarin 在 三溴化硼 作用下， 以 二氯甲烷 为溶剂， 反应 0.33h， 以75%的产率得到8-hydroxy-6,7-dimethoxy-3-methyl isocoumarin
  参考文献：
  名称：

  An Efficient Synthesis of 8-Hydroxy-6,7-dimethoxy-3-methylisocoumarin (6-O-methylreticulol)

  摘要：

  DOI：

  10.1007/s10593-006-0005-6
• 作为产物：
  描述：

  6-(carboxymethyl)-2,3,4-trimethoxybenzoic acid 在 吡啶 、 乙酸酐 作用下， 以 乙醚 为溶剂， 反应 2.0h， 生成 6,7,8-trimethoxy-3-methylisocoumarin
  参考文献：
  名称：

  An Efficient Synthesis of 8-Hydroxy-6,7-dimethoxy-3-methylisocoumarin (6-O-methylreticulol)

  摘要：

  DOI：

  10.1007/s10593-006-0005-6

文献信息

• Reactions of 3-(1-Hydroxyalkyl)phthalides with Acids:  Synthesis of (<i>Z</i>)-3-Alkylidenephthalides and 3-Alkyl-8-hydroxyisocoumarins
  作者：Raghao S. Mali、Kantipudi N. Babu

  DOI：10.1021/jo971622e

  日期：1998.4.1

  acid-catalyzed method for the synthesis of (Z)-3-butylidenephthalides 5 and a novel and general route to 3-alkyl-8-hydroxy/methoxyisocoumarins 6-8 from phthalides 9 is described. The hydroxyphthalides 4 and 10 were obtained by condensation of the phthalide anion with butyraldehyde and acetaldehyde. Reaction of hydroxyphthalides 4 with a mixture of orthophosphoric acid and formic acid gave the (Z)-3

  描述了一种新的酸催化的合成（Z）-3-丁二烯酞化物5的方法，以及从酞化物9制备3-烷基-8-羟基/甲氧基异香豆素6-8的新颖且通用的路线。通过将邻苯二甲酸酯阴离子与丁醛和乙醛缩合获得羟基邻苯二甲酸酯4和10。羟基邻苯二甲酸酯4与正磷酸和甲酸的混合物反应，得到（Z）-3-丁叉萘二甲酸酯5，而羟基邻苯二甲酸酯4和10与对甲苯磺酸反应生成3-烷基异香豆素6-8。本方法允许异香豆素中3-取代基的变化以及异香豆素和亚烷基萘的芳环上官能化的模式。
• Biochemical and Structural Studies of the Carminomycin 4-<i>O</i>-Methyltransferase DnrK
  作者：Elnaz Jalali、Fengbin Wang、Brooke R. Overbay、Mitchell D. Miller、Khaled A. Shaaban、Larissa V. Ponomareva、Qing Ye、Hoda Saghaeiannejad-Esfahani、Minakshi Bhardwaj、Andrew D. Steele、Christiana N. Teijaro、Ben Shen、Steven G. Van Lanen、Qing-Bai She、S. Randal Voss、George N. Phillips、Jon S. Thorson

  DOI：10.1021/acs.jnatprod.3c00947

  日期：2024.4.26

  4-O-methyltransferase DnrK are described, with an emphasis on interrogating the acceptor substrate scope of DnrK. Specifically, the evaluation of 100 structurally and functionally diverse natural products and natural product mimetics revealed an array of pharmacophores as productive DnrK substrates. Representative newly identified DnrK substrates from this study included anthracyclines, angucyclines, anthraquinone-fused

  描述了卡米霉素 4-O-甲基转移酶 DnrK 的结构和功能研究，重点是询问 DnrK 的受体底物范围。具体来说，对 100 种结构和功能不同的天然产物和天然产物模拟物的评估揭示了一系列药效团作为生产性 DnrK 底物。本研究中新鉴定的代表性 DnrK 底物包括蒽环类、安环类、蒽醌融合的烯二炔、类黄酮、吡喃萘醌和聚酮类。与非天然荧光羟基香豆素受体 4-甲基伞形酮结合的 DnrK 的配体结合结构，以及 4-甲基伞形酮和天然受体卡米霉素的相应 DnrK 动力学参数也首次报道。DnrK 被证明的独特允许性突出了 DnrK 作为未来生物催化和/或应变工程应用的新工具的潜力。此外，一组精选 DnrK 底物/产品的比较生物活性评估（癌细胞系细胞毒性、4E-BP1 磷酸化和蝾螈胚胎尾部再生）突出了蒽环类药物 4-O-甲基化决定不同功能结果的能力。
• CRYPTIC ANTIBIOTICS AND METHODS FOR DETECTING BIOACTIVE CRYPTIC METABOLITES
  申请人：THE TRUSTEES OF PRINCETON UNIVERSITY

  公开号：US20210156840A1

  公开（公告）日：2021-05-27

  Bacteria harbor an immense reservoir of potentially new and therapeutic small molecules in the form of “silent” biosynthetic gene clusters. These clusters can be identified bioinformatically but are at best sparingly expressed under normal laboratory growth conditions; their products are therefore not interrogated during bioactivity screening exercises. An estimated 80-90% of biosynthetic loci are silent, meaning that routine bioactivity screens miss the majority of microbial biosynthetic potential. Disclosed herein is a method that allows access to this vast hidden metabolome, thereby allowing researchers to screen the complete metabolomes of microorganisms in the search of new therapeutic leads. The disclosed approach, “Bioactivity-HiTES”, broadly activates the secondary metabolomes of bacteria and links the cryptic metabolites produced to a desired biological activity. Using the disclosed method, induction of cryptic antibiotics was detected in all four actinomycete bacterial strains that were tested as proof-of-concept. Follow-up in two cases demonstrated the production of two new antibiotics: In one case, the taylorflavins, pyrimidine antibiotics that harbor selective growth-inhibitory activity toward Gram-negative bacteria, were identified. For example, taylorflavin B shows potent minimal inhibitory concentration toward Neisseria gonorrhoeae and Acinetobacter baumanii , but not against a panel of Gram-positive bacteria. In the second case, the lanthipeptide cebulantin, which is specific toward Gram-negative Vibrio pathogens, but does not affect the growth of Gram-positive bacteria tested, was identified. These compounds, taylorflavins and cebulantin, may serve as useful leads in the future. At the same time, Bioactivity-HiTES may be applied broadly to identify cryptic metabolites with the desired biological properties.
• An Efficient Synthesis of 8-Hydroxy-6,7-dimethoxy-3-methylisocoumarin (6-O-methylreticulol)
  作者：Aamer Saeed、Somia Ehsan

  DOI：10.1007/s10593-006-0005-6

  日期：2005.11