35418-05-4Relevant academic research and scientific papers
Radiosensitization of human pancreatic cancer by piperlongumine analogues
Ma, Hao,Wu, Yuelin,Zhang, Wannian,Zhang, Huojun,Miao, Zhenyuan,Zhuang, Chunlin
supporting information, p. 1197 - 1201 (2020/10/02)
Radiotherapy is commonly used to treat advanced pancreatic cancers and can improve survival by 2 months in combination with gemcitabine. However, prognosis and survival improvement remain unsatisfactory, and effective therapies are urgently needed. Piperlongumine has been demonstrated to have therapeutic potentials against various cancers. In this study, we synthesized a series of piperlongumine derivatives and provided evidence that piperlongumine derivatives could be used as effective radiosensitizers in pancreatic cancer. Two compounds enhanced the radiosensitivity of Panc-1 and SW1990 cells. In a pancreatic bi-flank xenograft tumor model, they significantly inhibited tumor growth. Piperlongumine derivatives could induce reactive oxygen species (ROS) expression and regulate the Keap1-Nrf2 protective pathway with enhancement of radiation-induced DNA damage, G2/M-phase cell cycle arrest, and apoptosis. Collectively, our data offer a proof of concept for the use of piperlongumine derivatives as a novel class of radiosensitizers for the treatment of pancreatic cancer.
UREA, AMIDE, AND SUBSTITUTED HETEROARYL COMPOUNDS FOR CBL-B INHIBITION
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Paragraph 0374, (2021/02/05)
Compounds of formulae (I) and (II), compositions, and methods for use in inhibiting the E3 enzyme Cbl-b in the ubiquitin proteasome pathway are disclosed. The compounds, compositions, and methods can be used to modulate the immune system, to treat diseases amenable to immune system modulation, and for treatment of cells invivo, in vitro, or ex vivo.
New coumarin/sulfocoumarin linked phenylacrylamides as selective transmembrane carbonic anhydrase inhibitors: Synthesis and in-vitro biological evaluation
Angeli, Andrea,Arifuddin, Mohammed,Singh, Priti,Supuran, Claudiu T.,Swain, Baijayantimala
, (2020/07/03)
Two novel series of phenylacrylamide linked coumarins and sulfocoumarins (6a-p, 8a-i, and 14a-g) were synthesized and evaluated against four physiologically relevant human carbonic anhydrases (hCAs, EC 4.2.1.1), isoforms hCA I, hCA II, hCA IX and hCA XII for their inhibitory action. All new compounds when screened for carbonic anhydrase inhibitory activity have shown selective inhibition towards the tumor associated isoforms hCA IX and XII over CA I and II, with inhibition constants in the submicromolar to low nanomolar range. Compound 6b and 14g exhibited significant inhibition with low nanomolar potency against hCA IX, whereas 6k was effective against hCA XII. Compounds 6b, 14g and 6k may be considered as lead molecules for future development of cancer therapeutics based on a novel mechanism of action.
Synthesis, in silico study and antimicrobial activity of new piperine derivatives containing substituted δ-esters
Barbosa-Filho, José M.,Brandao, Maria C. R.,De Athayde-Filho, Petr?nio F.,Dutra, Thalisson F.,Lima, Edeltrudes O.,Lira, Bruno F.,Neto, Hermes Diniz,Trindade, Emmely O.
, p. 2590 - 2602 (2020/11/18)
A series of fifteen new piperine-derived diesters was synthesized through the substitution reaction between the salt of piperic acid, obtained through piperine basic hydrolysis, with the δ-chloro-esters, obtained through the cleavage of tetrahydrofuran (THF) with acyl chlorides in the presence of ZnCl2. The final compounds were obtained with yields ranging from 50 to 84% and were characterized by infrared (IR) and 1H and 13C nuclear magnetic resonance spectroscopy (NMR). The new compounds were evaluated in silico in regard to their ADME (absorption, distribution, metabolism, and excretion) properties, and in vitro for their antimicrobial activity against bacteria strains (Staphylococcus aureus and Pseudomonas aeruginosas), yeast fungi (Candida albicans and C. tropicalis) and filamentous fungi (Aspergillus fumigatus, A. flavus and A. niger). The results from the in silico studies of Lipinski's rule of five showed that most compounds present good pharmacological possibilities, and the results from in vitro antimicrobial activity showed that 8 of the 15 synthesized compounds displayed antimicrobial activity, inhibiting the growth of 40-80% of tested strains, with a minimum inhibitory concentration (MIC) interval ranging from 1024 to 256 μg mL-1
INHIBITORS OF CBL-B AND METHODS OF USE THEREOF
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Paragraph 1407, (2019/08/12)
Compounds, compositions, and methods for use in inhibiting the E3 enzyme Cbl-b in the ubiquitin proteasome pathway are disclosed. The compounds, compositions, and methods can be used to modulate the immune system, to treat diseases amenable to immune system modulation, and for treatment of cells in vivo, in vitro, or ex vivo.
Synthesis, preliminarily biological evaluation and molecular docking study of new Olaparib analogues as multifunctional PARP-1 and cholinesterase inhibitors
Gao, Cheng-Zhi,Dong, Wei,Cui, Zhi-Wen,Yuan, Qiong,Hu, Xia-Min,Wu, Qing-Ming,Han, Xianlin,Xu, Yao,Min, Zhen-Li
, p. 150 - 162 (2018/11/30)
A series of new Olaparib derivatives was designed and synthesized, and their inhibitory activities against poly (ADP-ribose) polymerases-1 (PARP-1) enzyme and cancer cell line MDA-MB-436 in vitro were evaluated. The results showed that compound 5l exhibited the most potent inhibitory effects on PARP-1 enzyme (16.10 ± 1.25 nM) and MDA-MB-436 cancer cell (11.62 ± 2.15 μM), which was close to that of Olaparib. As a PARP-1 inhibitor had been reported to be viable to neuroprotection, in order to search for new multitarget-directed ligands (MTDLs) for the treatment of Alzheimer’s disease (AD), the inhibitory activities of the synthesized compounds against the enzymes AChE (from electric eel) and BChE (from equine serum) were also tested. Compound 5l displayed moderate BChE inhibitory activity (9.16 ± 0.91 μM) which was stronger than neostigmine (12.01 ± 0.45 μM) and exhibited selectivity for BChE over AChE to some degree. Molecular docking studies indicated that 5l could bind simultaneously to the catalytic active of PARP-1, but it could not interact well with huBChE. For pursuit of PARP-1 and BChE dual-targeted inhibitors against AD, small and flexible non-polar groups introduced to the compound seemed to be conducive to improving its inhibitory potency on huBChE, while keeping phthalazine-1-one moiety unchanged which was mainly responsible for PARP-1 inhibitory activity. Our research gave a clue to search for new agents based on AChE and PARP-1 dual-inhibited activities to treat Alzheimer’s disease.
Pyridazinone derivative, and preparation method and medical application thereof
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, (2019/10/07)
The invention provides a pyridazinone derivative, and a preparation method and a medical application thereof. O-formylbenzoic acid used as a raw material reacts with dimethyl phosphite to obtain dimethyl (3-oxo-1,3-dihydroisobenzofuran-1-yl)phosphonate, the dimethyl (3-oxo-1,3-dihydroisobenzofuran-1-yl)phosphonate reacts with 3-cyano-4-fluorobenzaldehyde in the presence of triethylamine to prepare (Z,E)-2-fluoro-5-[(3-oxoisobenzofuran-1(3H)-ylidene)methyl]benzonitrile, and the (Z,E)-2-fluoro-5-[(3-oxoisobenzofuran-1(3H)-ylidene)methyl]benzonitrile is reduced by hydrazine hydrate to prepare 2-fluoro-5-[(4-oxo-3,4-dihydropyridazin-1-yl)methyl]benzoic acid; and benzaldehyde or substituted aromatic formaldehyde or furfural used as a raw material and malonic acid undergo a Knoevenagel reaction to obtain cinnamic acid or substituted cinnamic acid or furan-2-acrylic acid, the cinnamic acid or substituted cinnamic acid or furan-2-acrylic acid and 1-tert-butoxycarbonylpiperazine undergo an amidation reaction, a tert-butoxycarbonyl group is removed from the obtained amidation product in the presence of trifluoroacetic acid, and the obtained product and the 2-fluoro-5-[(4-oxo-3,4-dihydropyridazin-1-yl)methyl]benzoic acid undergo the amidation reaction to obtain a series of (E)-4-{3-[4-[(3-substituted aryl)acryloyl]piperazin-1-carbonyl]-4-fluorobenzyl}-2H-pyridazin-1-one derivatives. Results of preliminary pharmacological activity screening show that the compound represented by a general formula shown in the present invention has a certain in-vitro PARP-1 inhibition ability and a certain in-vitro tumor cell proliferation resisting activity. The structural general formula of compound is shown in the description; and in the general formula, Ar is selected from two formulas also shown in the description, and R1, R2, R3, R3, R4 and R5 can be the hydrogen atom, the fluorine atom, the chlorine atom, the bromine atom, a methyl group, a methoxy group, a tetrafluoromethyl group and a nitro group.
Cinnamoyl-oxaborole amides: Synthesis and their in vitro biological activity
Gumbo, Maureen,Beteck, Richard M.,Mandizvo, Tawanda,Seldon, Ronnett,Warner, Digby F.,Hoppe, Heinrich C.,Isaacs, Michelle,Laming, Dustin,Tam, Christina C.,Cheng, Luisa W.,Liu, Nicole,Land, Kirkwood M.,Khanye, Setshaba D.
, (2018/09/26)
Due to the increased interest in their application in the treatment of infectious diseases, boron-containing compounds have received a significant coverage in the literature. Herein, a small set of novel cinnamoly-oxaborole amides were synthesized and screened against nagana Trypanosoma brucei brucei for antitrypanosomal activity. Compound 5g emerged as a new hit with an in vitro IC50 value of 0.086 μM against T. b. brucei without obvious inhibitory activity against HeLa cell lines. The same series was also screened against other human pathogens, including Mycobacterium tuberculosis, the causative agent of tuberculosis (TB), for which moderate to weak activity (10 to >125 μM) was observed. Similarly, these compounds exhibited moderate activity against the human protozoal pathogen Trichomonas vaginalis with no observed effect on common microbiome bacterial species. The cross-species inhibitory activity presents the possibility of these compounds serving as broad-spectrum antibiotics for these prevalent three human pathogens.
Design, synthesis, bioactivity, and computational studies of some morpholine-clubbed coumarinyl acetamide and cinnamide derivatives
Chauhan, Prakashsingh M.,Thummar, Sandeep N.,Chikhalia, Kishor H.
, p. 1261 - 1277 (2018/05/22)
Abstract: The novel derivatives of morpholine-clubbed 3-substituted coumarinyl acetamide and cinnamide derivatives 5a–5j and 6a–6j have been synthesized via various 2-chloro-N-phenyl acetamide and cinnamoyl chloride derivatives, respectively. The required motif has been generated through Vilsmeier–Haack reaction on 4-hydroxycoumarin annelation of morpholine followed by imine formation and subsequently condensation with various 2-chloro-N-phenylacetamide and cinnamoyl chloride to furnish the desired molecule. The synthesized molecules were characterized by various spectroscopic methods viz IR, 1H NMR, 13C NMR. Their antimicrobial activities against various strains of bacteria and fungi have been evaluated, and computational studies have also been performed for all the newly synthesized analogs. Graphical Abstract: [Figure not available: see fulltext.].
Pd(II)-catalyzed cascade Heck/intramolecular C(sp2)–H amidation reaction: An efficient route to 4-aryl-2-quinolinones
Xiao, Chengqian,Wang, Ziyi,Lei, Min,Hu, Lihong
supporting information, p. 204 - 211 (2016/12/23)
A Pd(II)-catalyzed cascade Heck/intramolecular C(sp2)–H amidation reaction is described for the synthesis of 4-aryl-2-quinolinone derivatives. Substituted cinnamamide containing 2-(pyridin-2-yl)ethanamine unit reacts with aryl iodide to form in
