Synthesis, cytotoxicity and antioxidant activity of new 1,3-dimethyl-8-(chromon-3-yl)-xanthine derivatives containing 2,6-di-<i>tert</i>-butylphenol fragments
作者:Stanislav S. Shatokhin、Vladislav A. Tuskaev、Svetlana Ch. Gagieva、Alina A. Markova、Dmitry I. Pozdnyakov、Gleb L. Denisov、Elizaveta K. Melnikova、Boris M. Bulychev、Eduard T. Oganesyan
DOI:10.1039/d1nj03726a
日期:——
6-amino-5-((3,5-di-tert-butyl-4-oxocyclohexa-2,5-dien-1-ylidene)amino)-1,3-dimethyl-pyrimidine-2,4(1H,3H)-dione allowed us to synthesize chromone based hybrids containing additional pharmacophores – xanthine and stericallyhinderedphenolfragments. The novel compounds have been characterized using 1H and 13C NMR spectroscopy, mass spectrometry and elemental analysis. The molecular structure of compound
3- formylchromones和6-氨基-5-缩合- ((3,5-二-叔丁基-4-氧代环己-2,5-二烯-1-亚基)氨基)-1,3-二甲基嘧啶2,4(1 H ,3 H )-二酮使我们能够合成含有额外药效团——黄嘌呤和位阻酚片段的基于色酮的杂化物。这些新化合物已使用1 H 和13 C NMR 光谱、质谱和元素分析进行了表征。使用单晶 X 射线衍射研究确定了化合物2的分子结构。化合物2-9,11,和12在亚微摩尔浓度下对 HCT116 人结肠癌细胞和 MCF7 乳腺癌细胞表现出细胞毒活性。含有 6,8-二甲基色酮核心的化合物11对肿瘤细胞的细胞毒性最高,对非肿瘤成纤维细胞的细胞毒性最低——这是所获得系列中的领先化合物,具有可接受的体外选择性。合成的化合物表现出与参考药物 Trolox 相当的抗氧化活性。有希望的抗氧化活性和体外选择性抗肿瘤细胞毒性的结合表明这些化合物作为化疗药物的前景广阔。
Solvent-dependent regio- and stereo-selective reactions of 3-formylchromones with 2-aminobenzothiazoles and transacetalization efficiency of the product 3-((benzo[<i>d</i>]thiazol-2-ylimino)butyl)-4<i>H</i>-chromen-4-one
indole-3-carbaldehydes sometimes resulted in the formation of the corresponding imines, whereas replacing 2-aminobenzothiazole with amides resulted in the formation of acetals. Considering the effect of the solvent, replacing alcohols with the aprotic solvents THF and CH2Cl2 resulted in the formation of imines and enamines, which are the characteristic reactions of 2-propanol and other 1° and 2°-alcohols
Transition-metal-free cascade benzannulations for synthesizing 2-hydroxybenzophenones
作者:Xue-Wen He、Wei Zhou、Min Zhang、Min-Yi Tian、Hui-Juan Wang、You-Ping Tian、Xiong-Li Liu
DOI:10.1039/d0ob01894e
日期:——
A set of cascade benzannulations of readily accessible chromone-3-carboxaldehydes and γ-nitroaldehydes for synthesizing biologically relevant 2-hydroxybenzophenones has been developed.
Synthesis of Chromone-Containing Allylmorpholines through a Morita-Baylis-Hillman-Type Reaction
作者:Nikita M. Chernov、Roman V. Shutov、Oleg I. Barygin、Mikhail Y. Dron、Galina L. Starova、Nikolay N. Kuz'mich、Igor P. Yakovlev
DOI:10.1002/ejoc.201801159
日期:2018.12.6
An unusual addition of enamines to chromone‐substituted acrylic acid is an efficient and versatile method of synthesis of allylamine derivatives. The reaction is catalyzed by amines and is highly likely of Morita–Baylis–Hillman‐type. The described compounds show combined moderate inhibitory action on BChE and antagonism towards NMDA receptors
Compound 2 (EC50 = 0.41 μg/mL) displayed the most effective inhibitory potency against R. solani in vivo, comparable protective effects with the positive control carbendizam. Preliminary mechanistic studies indicated that compound 2 induced disordered entanglement of hyphae, shrinkage of hyphal surfaces, extravasation of cellular contents, and vacuole swelling and rupture, which disrupted normal hyphal