[EN] NOVEL COMPOUNDS TO TREAT CYTOKINE RELATED DISORDERS [FR] NOUVEAUX COMPOSÉS POUR TRAITER DES TROUBLES LIÉS À LA CYTOKINE
摘要:
The present invention relates to novel compounds of the general formula (I) having the potential to treat cytokine related disorders, their tautomeric forms, their stereoisomers, their pharmaceutically acceptable salts, pharmaceutical compositions containing them, methods for their preparation, use of these compounds in medicine and the intermediates involved in their preparation.
Synthetische Anthracyclinone, XVIII. Synthese des 13-Desoxo-6-desoxydaunomycinons und des β<sub>1</sub>-Citromycinons
作者:Karsten Krohn
DOI:10.1002/jlac.198119811216
日期:1981.12.24
Der 8-O-Methylether 5b des Chrysophanols wird über eine regioselektive Dienreaktion von Juglon (2) mit 3-Methyl-1-trimethylsiloxy-1,3-butadien (3), Methylierung des Addukts 4a, Spaltung des Trimethylsilylethers 4c und Pyridinium-chlorochromat-(PCC-)Oxidation von 4d zu 5b erhalten. Ein Substituent an C-2 kann durch Hydroxymethylierung von 5b zu 6a gefolgt von Kettenverlängerung zum Keton 8a eingeführt
Organocatalyzed benzannulation for the construction of diverse anthraquinones and tetracenediones
作者:Krishna Bahadur Somai Magar、Likai Xia、Yong Rok Lee
DOI:10.1039/c5cc00623f
日期:——
An efficient one-pot synthesis of anthraquinones and tetracenediones was achieved by l-proline catalyzed benzannulation of commercially available 1,4-naphthoquinones or 1,4-anthracenedione with a variety of α,β-unsaturated aldehydes in good to excellent yield.
Studies of Diastereoselectivity in Diels−Alder Reactions of Enantiopure (S<i>S</i>)-2-(<i>p</i>-Tolylsulfinyl)-1,4-naphthoquinone and Chiral Racemic Acyclic Dienes
作者:M. Carmen Carreño、Susana García-Cerrada、Antonio Urbano、Claudio Di Vitta
DOI:10.1021/jo000210u
日期:2000.7.1
Enantiopure sulfinylnaphthoquinone (+)-5 reacted with racemic acyclic dienes 1a-f bearing a stereogenic allylic center, through a tandem cycloaddition/pyrolytic sulfoxide elimination, to afford optically enriched compounds 8a-f and 9a-f with good like/unlike selectivities (ca. 75:25) and good enantiomeric excesses (68-82%), arising from the partial kinetic resolution of the racemic dienes. The opposite
Applications of [4+2] Anionic Annulation and Carbonyl-Ene Reaction in the Synthesis of Anthraquinones, Tetrahydroanthraquinones, and Pyranonaphthoquinones
作者:Shyam Basak、Dipakranjan Mal
DOI:10.1021/acs.joc.7b01987
日期:2017.10.20
5-dienoates, susceptible to isomerization by acids and bases, are suitable for the [4+2] anionic annulation to give 3-(2-alkenyl)naphthoates in regiospecific manner. When combined with intramolecular carbonyl-enereaction (ICE), the accessibility of the naphthoates culminates in a new synthesis of anthraquinones and diastereoselective synthesis of tetrahydroanthraquinones. This strategy has also resulted in a
Dynemicin A Derivatives as Potential Cancer Chemotherapeutics by Mutasynthesis
作者:Paramita Pal、Jamie R. Alley、Douglas R. Cohen、Craig A. Townsend
DOI:10.1002/hlca.202300123
日期:2023.12
The enediyne antitumor antibiotics have remarkable structures and exhibit potent DNA cleavage properties that have inspired continued interest as cancer therapeutics. Their complex structures and high reactivity, however, pose formidable challenges to their production and development in the clinic. We report here proof-of-concept studies using a mutasynthesis strategy to combine chemical synthesis
烯二炔抗肿瘤抗生素具有非凡的结构,并表现出强大的 DNA 切割特性,这激发了人们对癌症治疗的持续兴趣。然而,它们复杂的结构和高反应活性对其临床生产和开发提出了巨大的挑战。我们在此报告了概念验证研究,使用变合成策略将化学合成与关键碘蒽-γ-硫内酯中间体的选择性修饰结合起来,用于动力霉素 A 和所有其他已知的蒽醌稠合烯二炔 (AFE) 的生物合成。通过对无法合成这种基本结构单元的突变细菌生产者进行化学互补,我们表明可以制备取代蒽醌基序 A 环的动力霉素衍生物。在没有来自该中间体的天然生产的竞争的情况下,最有效地利用这些外部提供的结构类似物进行前体定向的生物合成成为可能。为了实现这一目标,我们描述了所需的 Δ orf15阻断突变体以及碘蒽结构变体库的一般合成路线。它们的成功掺入为增强 DNA 结合和调节修饰烯二炔的生物还原激活以进行 DNA 切割打开了大门。