29111-46-4Relevant articles and documents
CATHEPSIN-D AND ANGIOGENESIS INHIBITORS AND COMPOSITIONS THEREOF FOR TREATING BREAST CANCER
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Page/Page column 18, (2018/09/28)
The invention relates to Cathepsin-D and angiogenesis inhibitors and compositions thereof for treating breast cancer. More particularly, the invention relates to the design and synthesis of inhibitors of Cathepsin D which exhibits antiproliferative activity and also inhibits angiogenesis. The present invention also relates to the compositions thereof for treating breast cancer.
Identification, structure modification, and characterization of potential small-molecule SGK3 inhibitors with novel scaffolds
Gong, Grace Qun,Wang, Ke,Dai, Xin-Chuan,Zhou, Yan,Basnet, Rajesh,Chen, Yi,Yang, De-Hua,Lee, Woo-Jeong,Buchanan, Christina Maree,Flanagan, Jack Urquhart,Shepherd, Peter Robin,Chen, Ying,Wang, Ming-Wei
, p. 1902 - 1912 (2018/07/31)
The serum and glucocorticoid-regulated kinase (SGK) family has been implicated in the regulation of many cellular processes downstream of the PI3K pathway. It plays a crucial role in PI3K-mediated tumorigenesis, making it a potential therapeutic target for cancer. SGK family consists of three isoforms (SGK1, SGK2, and SGK3), which have high sequence homology in the kinase domain and similar substrate specificity with the AKT family. In order to identify novel compounds capable of inhibiting SGK3 activity, a high-throughput screening campaign against 50,400 small molecules was conducted using a fluorescence-based kinase assay that has a Z' factor above 0.5. It identified 15 hits (including nitrogen-containing aromatic, flavone, hydrazone, and naphthalene derivatives) with IC50 values in the low micromolar to sub-micromolar range. Four compounds with a similar scaffold (i.e., a hydrazone core) were selected for structural modification and 18 derivatives were synthesized. Molecular modeling was then used to investigate the structure-activity relationship (SAR) and potential protein–ligand interactions. As a result, a series of SGK inhibitors that are active against both SGK1 and SGK3 were developed and important functional groups that control their inhibitory activity identified.
Design, Synthesis, and Evaluation of the Highly Selective and Potent G-Protein-Coupled Receptor Kinase 2 (GRK2) Inhibitor for the Potential Treatment of Heart Failure
Okawa, Tomohiro,Aramaki, Yoshio,Yamamoto, Mitsuo,Kobayashi, Toshitake,Fukumoto, Shoji,Toyoda, Yukio,Henta, Tsutomu,Hata, Akito,Ikeda, Shota,Kaneko, Manami,Hoffman, Isaac D.,Sang, Bi-Ching,Zou, Hua,Kawamoto, Tetsuji
, p. 6942 - 6990 (2017/09/07)
A novel class of therapeutic drug candidates for heart failure, highly potent and selective GRK2 inhibitors, exhibit potentiation of β-adrenergic signaling in vitro studies. Hydrazone derivative 5 and 1,2,4-triazole derivative 24a were identified as hit compounds by HTS. New scaffold generation and SAR studies of all parts resulted in a 4-methyl-1,2,4-triazole derivative with an N-benzylcarboxamide moiety with highly potent activity toward GRK2 and selectivity over other kinases. In terms of subtype selectivity, these compounds showed enough selectivity against GRK1, 5, 6, and 7 with almost equipotent inhibition to GRK3. Our medicinal chemistry efforts led to the discovery of 115h (GRK2 IC50 = 18 nM), which was obtained the cocrystal structure with human GRK2 and an inhibitor of GRK2 that potentiates β-adrenergic receptor (βAR)-mediated cAMP accumulation and prevents internalization of βARs in β2AR-expressing HEK293 cells treated with isoproterenol. Therefore, 115h appears to be a novel class of therapeutic for heart failure treatment.
Catechols and 3-hydroxypyridones as inhibitors of the DNA repair complex ERCC1-XPF
Chapman, Timothy M.,Gillen, Kevin J.,Wallace, Claire,Lee, Maximillian T.,Bakrania, Preeti,Khurana, Puneet,Coombs, Peter J.,Stennett, Laura,Fox, Simon,Bureau, Emilie A.,Brownlees, Janet,Melton, David W.,Saxty, Barbara
supporting information, p. 4097 - 4103 (2015/11/03)
Catechol-based inhibitors of ERCC1-XPF endonuclease activity were identified from a high-throughput screen. Exploration of the structure-activity relationships within this series yielded compound 13, which displayed an ERCC1-XPF IC50 of 0.6 μM, high selectivity against FEN-1 and DNase I and activity in nucleotide excision repair, cisplatin enhancement and γH2AX assays in A375 melanoma cells. Screening of fragments as potential alternatives to the catechol group revealed that 3-hydroxypyridones are able to inhibit ERCC1-XPF with high ligand efficiency, and elaboration of the hit gave compounds 36 and 37 which showed promising ERCC1-XPF IC50 values of 10 μM.
Transition metal complexes of novel ethyl pyruvate hydrazones as potential antitumor agents: Synthesis and physicochemical properties, DNA interactions and antiproliferative activity
Pathan, Aishakhanam H.,Gudasi, Kalagouda B.
, p. 1504 - 1516 (2013/05/08)
A new series of ethyl pyruvate hydrazones and their later first row transition metal(II) complexes have been synthesized and characterized by means of elemental analyses, vibrational, electronic, 1H and 13C NMR, electron paramagnetic resonance, and mass spectroscopic techniques along with thermal and magnetic studies. All complexes were found to be monomeric in nature and have octahedral geometry. The prepared compounds were evaluated for antiproliferative activity against the two human cancer cell lines (HeLa and HepG2). The Cu(II) complexes were found to have potential activity against the cell lines used than the ligand and other complexes. In addition, the DNA-binding/cleaving capacity of the compounds were analyzed by absorption spectroscopy, viscosity measurement, thermal denaturation studies and gel electrophoresis methods.
Design, synthesis, structural characterization by IR, 1H, 13C, 15N, 2D-NMR, X-ray diffraction and evaluation of a new class of phenylaminoacetic acid benzylidene hydrazines as pfenr Inhibitors
Samal, Ramanuj P.,Khedkar, Vijay M.,Pissurlenkar, Raghuvir R. S.,Bwalya, Angela Gono,Tasdemir, Deniz,Joshi, Ramesh A.,Rajamohanan,Puranik, Vedavati G.,Coutinho, Evans C.
, p. 715 - 729 (2013/07/05)
Recent studies have revealed that plasmodial enoyl-ACP reductase (pfENR, FabI), one of the crucial enzymes in the plasmodial type II fatty acid synthesis II (FAS II) pathway, is a promising target for liver stage malaria infections. Hence, pfENR inhibitors have the potential to be used as causal malarial prophylactic agents. In this study, we report the design, synthesis, structural characterization and evaluation of a new class of pfENR inhibitors. The search for inhibitors began with a virtual screen of the iResearch database by molecular docking. Hits obtained from the virtual screen were ranked according to their Glide score. One hit was selected as a lead and modified to improve its binding to pfENR; from this, a series of phenylamino acetic acid benzylidene hydrazides were designed and synthesized. These molecules were thoroughly characterized by IR, 1H, 13C, 15N, 2D-NMR (COSY, NOESY, 1H-13C, 1H-15N HSQC and HMBC), and X-ray diffraction. NMR studies revealed the existence of conformational/configurational isomers around the amide and imine functionalities. The major species in DMSO solution is the E, E form, which is in dynamic equilibrium with the Z, E isomer. In the solid state, the molecule has a completely extended conformation and forms helical structures that are stabilized by strong hydrogen bond interactions, forming a helical structure stabilized by N-H...O interactions, a feature unique to this class of compounds. Furthermore, detailed investigation of the NMR spectra indicated the presence of a minor impurity in most compounds. The structure of this impurity was deduced as an imidazoline-4-one derivative based on 1H-13C and 1H-15H HMBC spectra and was confirmed from the NOESY spectra. The molecules were screened for in vitro activity against recombinant pfENR enzyme by a spectrophotometric assay. Four molecules, viz. 17, 7, 10, and 12 were found to be active at 7, 8, 10, and 12?μm concentration, respectively, showing promising pfENR inhibitory potential. A classification model was derived based on a binary QSAR approach termed recursive partitioning (RP) to highlight structural characteristics that could be tuned to improve activity.
Regioselective sy nthesis and antimicrobial evaluation of new 1-aryloxyacetyl-, 1-thiophenoxyacetyl- and 1-phenylaminoacetylsubstituted 3-alkyl(aryl/heteroaryl)-5-trifluoromethyl-5-hydroxy-4,5-dihydro-1H-pyrazoles
Bonacorso, Helio G.,Pittaluga, Everton P.,Alves, Sydney H.,Schaffer, Larissa F.,Cavinatto, Susiane,Porte, Liliane M. F.,Paim, Gisele R.,Martins, Marcos A. P.,Zanatta, Nilo
body text, p. 62 - 75 (2012/07/31)
This paper describes an efficient approach for the regioselective synthesis of new series of twenty 1-aryloxy(thio)acetyl and 1-(phenylamino)acetyl- substituted 5-trifluoromethyl-5-hydroxy-4,5-dihydro-1H-pyrazoles (3) in 34-96% yields from the cyclocondensation reaction of 4-alkoxy-4-alkyl-(aryl/heteroaryl) -1,1,1-trifluoroalk-3-en-2-ones with different substituted acetohydrazides. Dehydration reactions of 3, carried out in the presence of thionyl chloride, furnished two examples of aromatic 5-trifluoromethyl-1H-pyrazole derivatives, in 78-82% yields. From antimicrobial tests the fungi C. albicans proved to be particularly susceptible to the action of 1-(phenylamino)acetyl-substituted 3-alkyl-2-pyrazoline derivatives; however the first results are still weak when compared to standard drugs. ARKAT-USA, Inc.
Synthesis and characterization of Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes of phenyl amino acetic acid ethyl acetoacetate-2-ylmethylene hydrazone
Kashar, Tahani I.,El-Nahas, Ahmed M.,El-Mughamsi, Asmaa M.
experimental part, p. 159 - 165 (2011/11/14)
Phenyl amino acetic acid ethyl acetoacetate-2-ylmethylene hydrazone and its Mn(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) complexes have been synthesized and characterized by elemental analyses, IR, UV-vis, electrical conductivity, magnetic moment and thermal analyses (DTA, TGA). All the investigated complexes are mononuclear. The ligand behaves as di- or tridentates mono or dibasic acid in mononuclear complexes. Density functional theory (DFT) calculations indicated that the diketo forms are the most tautomers and the agreement between the calculated and experimental frequencies is very good.
Thermal studies of acetylacetonato aniline acetohydrazone and complexes with divalent ions of Mn, Co, Ni and Cu
Kashar, Tahani I.
experimental part, p. 66 - 70 (2010/10/04)
The thermal studies of acetylacetonato aniline acetohydrazone and its divalent metal ions Mn2+, Co2+, Ni2+ and Cu2+ complexes were studied and discussed in terms of its molecular structure and type of metal ions. TG curves display mostly three steps of thermal decomposition. The first step is due to dehydration followed by the elimination of the anions from the complexes. The anhydrous free anion complexes undergo further decomposition forming metal oxides as final products. The activation energies Ea were evaluated and discussed in accordance with the structure of the complexes, which was assured, by elemental analyses and IR spectra.
X-ray crystal structure of phenylglycine hydrazide: Synthesis and spectroscopic studies of its transition metal complexes
Gudasi, Kalagouda B.,Patil, Manjula S.,Vadavi, Ramesh S.,Shenoy, Rashmi V.,Patil, Siddappa A.,Nethaji
, p. 172 - 177 (2008/02/03)
Phenylglycine hydrazide was synthesized and investigated by X-ray crystallography. It crystallizes in the monoclinic space group P121/c with cell parameters a = 5.9459 (18) A, b = 5.1940 (16) A, c = 26.7793 (83) A and Z = 2. Its conformational changes, on complexation with transition metal ions Cu(II), Co(II), Ni(II), Mn(II) and Zn(II) has been studied on the basis of elemental analysis, magnetic moment and spectral (IR, 1H NMR, UV-vis) studies. The bidentate nature of the ligand was confirmed on the basis of a comparative IR and NMR spectral studies. The trigonal bipyramidal geometries were observed for Cu(II), Ni(II) and Co(II) complexes, while it is octahedral for the remaining complexes. The conductivity data suggest them to be non-electrolytes.
