- Synthesis and solid-state structures of alkyl-substituted 3-cyano-2-pyridones
-
A series of 3-cyano-pyridones carrying a variety of alkyl substituents at C-5 and C-6 has been synthesized and their solid-state structures have been studied. Hydrogen bonding interactions between individual pyridone molecules lead either to the formation of symmetric dimers of the R2 2(8) type or to helical chains of the C(4) type. Based on known and calculated structures for the 2-pyridone parent system, the solid-state structures can be divided in two groups representing cases with little external influence on the hydrogen bonding array (group A) and those with a larger external influence (group B).
- Fischer, Christian B.,Polborn, Kurt,Steininger, Harald,Zipse, Hendrik
-
-
Read Online
- Design, synthesis and biological activities of pyrrole-3-carboxamide derivatives as EZH2 (enhancer of zeste homologue 2) inhibitors and anticancer agents
-
Zeste enhancer homolog 2 (EZH2) is highly expressed in various malignant tumors, which could silence tumor suppressor genes via trimethylation of H3K27. Herein was first reported a novel series of pyrrole-3-carboxamide derivatives carrying a pyridone fragment as EZH2 inhibitors. By combining computational modeling, in vitro cellular assays and further rational structure-activity relationship exploration and optimization, compound DM-01 showed powerful inhibition towards EZH2. DM-01 was found to have significant ability to reduce the cellular H3K27me3 level in K562 cells in the Western blot test. Meanwhile, our data showed that knockdown EZH2 in A549 cells resulted in a decrease of cell sensitivity to DM-01 at 50 and 100 μM. DM-01 could also increase the transcription expression of DIRAS3 in a dose-dependent manner, a tumor suppressor in the downstream of EZH2, suggesting it was worth investigating further as a lead compound.
- Zhou, Qifan,Jia, Lina,Du, Fangyu,Dong, Xiaoyu,Sun, Wanyu,Wang, Lihui,Chen, Guoliang
-
supporting information
p. 2247 - 2255
(2020/02/20)
-
- 5-Hydroxyindole-based EZH2 inhibitors assembled via TCCA-catalyzed condensation and Nenitzescu reactions
-
5-Hydroxyindole derivatives have various demonstrated biological activities. Herein, we used 5-hydroxyindole as a synthetic starting point for structural alterations in a combinatorial process to synthesize 22 different compounds with EZH2 inhibitor pharmacophores. A series of 5-hydroxyindole-derived compounds were screened inhibitory activities against K562 cells. According to molecular modeling and in vitro biological activity assays, the preliminary structure-activity relationship was summarized. Compound L–04 improved both the H3K27Me3 reduction and antiproliferation parameters (IC50 = 52.6 μM). These findings revealed that compound L–04 is worthy of consideration as a lead compound to design more potent EZH2 inhibitors. During the preparation of compounds, we discovered that trichloroisocyanuric acid (TCCA) is a novel catalyst which demonstrates condensation-promoting effects. To gain insight into the reaction, in situ React IR technology was used to confirm the reactivity. Different amines were condensed in high yields with β-diketones or β-ketoesters in the presence of TCCA to afford the corresponding products in a short time (10~20 min), which displayed some advantages and provided an alternative condensation strategy.
- Chen, Guoliang,Du, Fangyu,Sun, Wenjiao,Wang, Lihui,Wu, Chunfu,Yang, Cheng,Zhou, Qifan
-
supporting information
(2020/05/16)
-
- COMPOUNDS AND USE THEREOF IN THE EXPANSION OF STEM CELLS AND/OR PROGENITOR CELLS
-
The invention relates to compounds of formula I and pharmaceutical compositions containing them. Also, the invention relates to methods for expanding stem cells and/or progenitor cells and methods for treating a hematopoietic disorder/malignancy, and autoimmune disease and/or an inherited immunodeficient disease (I).
- -
-
Page/Page column 27
(2019/05/22)
-
- Pyrrole-3-formamide compound as well as preparation method and application thereof
-
The invention belongs to the technical field of medicines, and relates to a pyrrole-3-formamide compound as well as a preparation method and application thereof, in particular to a pyrrole-3-formamidecompound shown as a formula (I) or (II) and a pharmaceutically-acceptable salt thereof, wherein R to R and X are defined in the claims and description. The preparation of the compound mainly comprises performing Knorr pyrrole synthesis, Hantzsch pyrrole synthesis, decarboxylation, alkylation, hydrolysis, condensation, cyclization and reduction on ethyl acetoacetate or tert-butyl acetoacetate serving as the raw material. The pyrrole-3-formamide compound and the pharmaceutically-acceptable salt thereof have good treatment effects on tumors, and can be applied to the preparation of anti-tumor drugs. (The formulas (I) and (II) are shown in the description).
- -
-
Paragraph 0124; 0129; 0131; 0132; 0137; 0138
(2019/02/25)
-
- Zinc (II)-mediated selective O-benzylation of 2-Oxo-1,2-dihydropyridines systems
-
The selective O-benzylation of 2-oxo-1,2-dihydropyridines plays a critical role in organic synthesis of natural products and biological active molecules. Herein we report a novel ternary system of ZnO, ZnCl2 and N,N-diisopropylethylamine (DIEA), that is highly effective for selective O-benzylation of 2-oxo-1,2-dihydropyridines using abundant substituted benzyl halides and related substituted 2-oxo-1,2-dihydropyridines compounds. This process allows access to a variety of O-benzyl products under mild reaction conditions, which are important synthetic intermediates in the protection of functional groups, and represents a new method toward the development for the O-benzylation of 2-oxo-1,2-dihydropyridines.
- Zhou, Qifan,Du, Fangyu,Liang, Xinjie,Liu, Wenqiang,Fang, Ting,Chen, Guoliang
-
-
- Fusicoccin synthesis by intramolecular [4+4] photocycloaddition of 2-pyridones: Stereocontrol of the cycloaddition and elaboration of the pentacyclic product
-
Intramolecular photocycloaddition of a three-carbon tethered pyrindinone-pyridone system yields the 5-8-5 ring system of the fusicoccin/ophiobolin/ceroplastol families. The stereoselectivity of the cycloaddition was found to be dependent on nitrogen substitution; N-methylation led to exclusively trans products while an absence of nitrogen substitution resulted in solvent-dependent stereoselectivity. Solvent and concentration effects for this cycloaddition were consistent with a hydrogen-bonded dimer that enforces a pro-cis conformation in nonpolar solvents and at higher concentrations. The cis-isomer, a fusicoccin synthesis intermediate, underwent a Cope rearrangement at ambient temperature but could be trapped efficiently as the mono epoxide, yielding a product with six new stereogenic centers. A four-step transformation of an amide carbonyl to a methyl group was achieved using a carbamoyl group to activate the amide for cleavage.
- McGee Jr.,Al-Tel,Sieburth
-
p. 1185 - 1196
(2007/10/03)
-
- A synthetic strategy to a new class of cycloalkane ring-fused pyridine nucleosides as potential anti HIV agents
-
Condensation of cyanothioacetamide or cyanoacetamide with sodium salts of 2-formyl-1-cycloalkanones afforded the corresponding cycloalkane ring fused pyridine-2(1H)-thiones and -2-pyridones. The latter compounds served as a key intermediates for the synthesis of a new class of cycloalkane ring fused pyridine glycosides.
- Elgemeie, Galal E. H.,Attia, Adel M. E.,Hussain, Badria A. W.
-
p. 855 - 868
(2007/10/03)
-
- A Convenient Synthesis of Nicotinate Esters from 3-Cyanopyridones
-
A convenient synthesis of alkyl-substituted ethyl nicotinates 8 was devised, using 3-cyano-2(1H)-pyridones 4.These were converted to the corresponding 2-bromo-3-cyanopyridines 5 with boiling phosphorus tribromide.The resulting 5 were smoothly debrominated
- Paine, John B.
-
p. 351 - 355
(2007/10/02)
-