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Neat Multicomponent Assembly of Highly Functionalized Acenaphtho[1,2‐b]pyrroles, In Vitro Evaluation for Antioxidant and Cytotoxic Activities. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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2
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Design, synthesis, spectral characterization and molecular docking studies of novel pyranoquinolinyl dihydropyridine carboxylates as potential antibacterial agents including Vibrio cholerae with minimal cytotoxity towards fibroblast cell line (L-929). Bioorg Chem 2021; 107:104582. [PMID: 33450547 DOI: 10.1016/j.bioorg.2020.104582] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 11/20/2020] [Accepted: 12/19/2020] [Indexed: 11/25/2022]
Abstract
Novel pyranoquinolinyl dihydropyridine carboxylate (PDC) derivatives were designed by incorporating the multi-drug resistance modulating effects of 1,4 dihydropyridines along with potential antibacterial activity of quinolines in the molecular design. The designed PDC derivatives were synthesized by multi-step synthesis involving Michael addition, reduction followed by inverse electro demand Diels-Alder reaction to produce pyranoquinolinyl dihydropyridine carboxylates in good yields. All the PDC derivatives were characterized by 1H NMR, 13C NMR, FT-IR, Mass spectral and CHN analysis. The Quinolinyl dihydropyridine carboxylate derivatives were evaluated for in vitro antibacterial activity by agar well diffusion method. Molecular docking studies revealed that the exo diethyl 4-(4aR,5S,10bR)-5-(4-chlorophenyl)-3,4,4a,5,6,10b-hexahydro-2H-pyrano[3,2-c]quinolin-8-yl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate diastereomer (5c) forms four hydrogen bonds with the cell wall protein of vibrio cholerae in comparison to the endo diethyl 4-((4aR,5R,10bR)-5-(4-chlorophenyl)-3,4,4a,5,6,10b-hexahydro-2H-pyrano[3,2-c]quinolin-8-yl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate diastereomer (4c) which forms two hydrogen bonds with the cell wall protein of vibrio cholerae and hence leading to better anchorage, enhanced gold score and relatively good antibacterial activity for the exo PDC derivatives. Minimum inhibitory concentration (MIC) of the active compounds was evaluated by macro dilution method. The mechanism of antibacterial action of the PDC derivatives was investigated by SEM studies. The cytotoxicity of PDC derivatives were evaluated against fibroblast cells (L-929).
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Domino Palladium-Catalyzed Double Norbornene Insertion/Annulation Reaction: Expeditious Synthesis of Overcrowded Tetrasubstituted Olefins. Org Lett 2019; 21:4350-4354. [DOI: 10.1021/acs.orglett.9b01543] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Rhodium(iii)-catalysed decarbonylative annulation through C–H activation: expedient access to aminoisocoumarins by weak coordination. Chem Commun (Camb) 2018; 54:11889-11892. [DOI: 10.1039/c8cc07167e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Rh-Catalysed decarbonylative annulation of isatoic anhydrides with alkynes through C–H activation for the direct synthesis of 8-aminoisocoumarins has been developed.
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Ru(II)-Catalyzed Regiospecific C-H/O-H Oxidative Annulation to Access Isochromeno[8,1- ab]phenazines: Far-Red Fluorescence and Live Cancer Cell Imaging. ACS OMEGA 2017; 2:2694-2705. [PMID: 30023674 PMCID: PMC6044501 DOI: 10.1021/acsomega.7b00335] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Accepted: 05/19/2017] [Indexed: 06/08/2023]
Abstract
A facile ruthenium(II)-catalyzed regiospecific C-H/O-H oxidative annulation methodology was developed to construct isochromeno[8,1-ab]phenazines. This methodology delivers various advantages, such as scope for diverse substrates, tolerance to a range of functional groups, stability under air, and yields regioselective products. This methodology was successfully applied to synthesize far red (FR) fluorescent probes for live cancer cell imaging. The synthesized compounds displayed notable fluorescence properties in solution and thin-film. Their application in live cancer cell imaging was investigated using various cancer cell lines. The synthesized compound showed prominent FR fluorescence, with high quantum yield, and exhibited better cell-imaging properties, with excellent biocompatibility.
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Synthesis and Fabrication of Collagen-Coated Ostholamide Electrospun Nanofiber Scaffold for Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2017; 9:8556-8568. [PMID: 28221758 DOI: 10.1021/acsami.6b16488] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
A novel scaffold for effective wound healing treatment was developed utilizing natural product bearing collagen-based biocompatible electrospun nanofibers. Initially, ostholamide (OSA) was synthesized from osthole (a natural coumarin), characterized by 1H, 13C, DEPT-135 NMR, ESI-MS, and FT-IR spectroscopy analysis. OSA was incorporated into polyhydroxybutyrate (PHB) and gelatin (GEL), which serve as templates for electrospun nanofibers. The coating of OSA-PHB-GEL nanofibers with collagen resulted in PHB-GEL-OSA-COL nanofibrous scaffold which mimics extracellular matrix and serves as an effective biomaterial for tissue engineering applications, especially for wound healing. PHB-GEL-OSA-COL, along with PHB-GEL-OSA and collagen film (COLF), was characterized in vitro and in vivo to determine its efficacy. The developed PHB-GEL-OSA-COL nanofibers posed an impressive mechanical stability, an essential requirement for wound healing. The presence of OSA had contributed to antimicrobial efficacy. These scaffolds exhibited efficient antibacterial activity against common wound pathogens, Pseudomonas aeruginosa (P. aeruginosa) and Staphylococcus aureus (S. aureus). The zones of inhibition were observed to be 14 ± 22 and 10 ± 2 mm, respectively. It was observed that nanofibrous scaffold had the ability to release OSA in a controlled manner, and hence, OSA would be present at the site of application and exhibit bioactivity in a sustained manner. PHB-GEL-OSA-COL nanofiber was determined to be stable against enzymatic degradation, which is the most important parameter for promoting proliferation of cells contributing to repair and remodeling of tissues during wound healing applications. As hypothesized, PHB-GEL-OSA-COL was observed to imbibe excellent cytocompatibility, which was determined using NIH 3T3 fibroblast cell proliferation studies. PHB-GEL-OSA-COL exhibited excellent wound healing efficacy which was confirmed using full thickness excision wound model in Wistar rats. The rats treated with PHB-GEL-OSA-COL nanofibrous scaffold displayed enhanced healing when compared to untreated control. Both in vitro and in vivo analysis of PHB-GEL-OSA-COL presents a strong case of therapeutic biomaterial suiting wound repair and regeneration.
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Nanofibrous matrixes with biologically active hydroxybenzophenazine pyrazolone compound for cancer theranostics. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 74:70-85. [PMID: 28254336 DOI: 10.1016/j.msec.2017.01.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Revised: 12/16/2016] [Accepted: 01/31/2017] [Indexed: 12/19/2022]
Abstract
The nanomaterial with the novel biologically active compounds has been actively investigated for application in cancer research. Substantial use of nanofibrous scaffold for cancer research with potentially bioactive compounds through electrospinning has not been fully explored. Here, we describe the series of fabrication of nanofibrous scaffold loaded with novel potential biologically active hydroxybenzo[a]phenazine pyrazol-5(4H)-one derivatives were designed, synthesized by a simple one-pot, two step four component condensation based on Michael type addition reaction of lawsone, benzene-1,2-diamine, aromatic aldehydes and 3-methyl-1-phenyl-1H-pyrazol-5(4H)-one as the substrates. The heterogeneous solid state catalyst (Fe (III) Y-Zeolite) could effectively catalyze the reaction to obtain the product with high yield and short reaction time. The synthesized compounds (5a-5p) were analyzed by NMR, FTIR and HRMS analysis. Compound 5c was confirmed by single crystal XRD studies. All the compounds were biologically evaluated for their potential inhibitory effect on anticancer (MCF-7, Hep-2) and microbial (MRSA, MTCC 201 and FRCA) activities. Among the compounds 5i exhibited the highest levels of inhibitory activity against both MCF-7, Hep-2 cell lines. Furthermore, the compound 5i (BPP) was evaluated for DNA fragmentation, flow cytometry studies and cytotoxicity against MCF-7, Hep-2 and NIH 3T3 fibroblast cell lines. In addition, molecular docking (PDB ID: 1T46) studies were performed to predict the binding affinity of ligand with receptor. Moreover, the synthesized BPP compound was loaded in to the PHB-PCL nanofibrous scaffold to check the cytotoxicity against the MCF-7, Hep-2 and NIH 3T3 fibroblast cell lines. The in vitro apoptotic potential of the PHB-PCL-BPP nanofibrous scaffold was assessed against MCF-7, Hep-2 cancerous cells and fibroblast cells at 12, 24 and 48h respectively. The nanofibrous scaffold with BPP can induce apoptosis and also suppress the proliferation of cancerous cells. We anticipate that our results can provide better potential research in nanomaterial based cancer research.
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Fabrication of Arothron stellatus skin collagen film incorporated with Coccinia grandis as a durable wound construct. INT J POLYM MATER PO 2017. [DOI: 10.1080/00914037.2016.1252351] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Synthesis of Ni(II) complexes bearing indole-based thiosemicarbazone ligands for interaction with biomolecules and some biological applications. J Biol Inorg Chem 2016; 22:461-480. [DOI: 10.1007/s00775-016-1424-1] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 11/26/2016] [Indexed: 11/25/2022]
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Design and characterization of 3D hybrid collagen matrixes as a dermal substitute in skin tissue engineering. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 72:359-370. [PMID: 28024598 DOI: 10.1016/j.msec.2016.11.095] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 11/10/2016] [Accepted: 11/21/2016] [Indexed: 10/20/2022]
Abstract
The highly interconnected porous dressing material was fabricated with the utilization of novel collagen (COL-SPG) for the efficient healing of the wound. Herein, we report the fabrication of 3D collagen impregnated with bioactive extract (COL-SPG-CPE) to get rid of infection at the wound site. The resultant 3D collagen matrix was characterized physiochemically using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and mechanical property. The dressing substrate possesses the high swelling ability, increase in the porosity, in vitro enzymatic degradability and antibacterial property. The in vitro biocompatibility and fluorescence activity of the collagen scaffold against both NIH 3T3 fibroblast and Human keratinocyte (HaCaT) cell lines assisted in excellent cell adhesion and proliferation over the collagen matrix. Furthermore, the in vivo evaluation of the COL-SPG-CPE 3D sponge exhibited with enhanced collagen synthesis and aids in faster reepithelialization. However, the rate of wound healing was influenced by the expression of vascular endothelial growth factor (VEGF), epidermal growth factor (EGF) and transforming growth factor (TGF-β) growth factors promotes the collagen synthesis, thereby increases the healing efficiency. Based on the results, COL-SPG-CPE has a potential ability in the remodeling of the wound with the 3D collagen as wound dressing material.
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In vitro antiproliferative activity of 2,3-dihydroxy-9,10-anthraquinone induced apoptosis against COLO320 cells through cytochrome c release caspase mediated pathway with PI3K/AKT and COX-2 inhibition. Chem Biol Interact 2016; 249:23-35. [PMID: 26915975 DOI: 10.1016/j.cbi.2016.02.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 01/30/2016] [Accepted: 02/19/2016] [Indexed: 12/22/2022]
Abstract
The present study investigated the anticancer activity of 2,3-dihydroxy-9,10-anthraquinone against different cancer cells such as MCF-7, COLO320, HepG-2, Skov-3, MOLM-14, NB-4, CEM, K562, Jurkat, HL-60, U937, IM-9 and Vero. 2,3-dihydroxy-9,10-anthraquinone showed good antiproliferative activity against COLO320 cells when compared to other tested cells. The cytotoxicity results showed 79.8% activity at the dose of 2.07 μM with IC50 value of 0.13 μM at 24 h in COLO320 cells. So we chose COLO320 cells for further anticancer studies. mRNA expression was confirmed by qPCR analysis using SYBR green method. Treatment with 2,3-dihydroxy-9,10-anthraquinone was found to trigger intrinsic apoptotic pathway as indicated by down regulation of Bcl-2, Bcl-xl; up regulation of Bim, Bax, Bad; release of cytochrome c and pro-caspases cleaving to caspases. Furthermore, 2,3-dihydroxy-9,10-anthraquinone stopped at G0/G1 phase with modulation in protein levels of cyclins. On the other hand PI3K/AKT signaling plays an important role in cell metabolism. We found that 2,3-dihydroxy-9,10-anthraquinone inhibits PI3K/AKT activity after treatment. Also, COX-2 enzyme plays a major role in colorectal cancer. Our results showed that the treatment significantly reduced COX-2 enzyme in COLO320 cells. These results indicated antiproliferative activity of 2,3-dihydroxy-9,10-anthraquinone involving apoptotic pathways, mitochondrial functions, cell cycle checkpoint and controlling the over expression genes during the colorectal cancer. Molecular docking studies showed that the compound bound stably to the active sites of Bcl-2, COX-2, PI3K and AKT. This is the first report of anticancer mechanism involving 2,3-dihydroxy-9,10-anthraquinone in COLO320 cells. The present results might provide helpful suggestions for the design of antitumor drugs toward colorectal cancer treatment.
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Crystal structures of methyl (E)-3-(2-chloro-phen-yl)-2-({2-[(E)-2-nitro-vin-yl]phen-oxy}meth-yl)acrylate and methyl (E)-2-({4-chloro-2-[(E)-2-nitro-vin-yl]phen-oxy}meth-yl)-3-(2-chloro-phen-yl)acrylate. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2016; 72:261-5. [PMID: 26958402 PMCID: PMC4770962 DOI: 10.1107/s2056989016001493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 01/23/2016] [Indexed: 11/29/2022]
Abstract
In the title compounds, (I) and (II), both of which crystallize in the monoclinic space group P21/n, the methyl acrylate and nitrovinyl units are relatively planar with an E conformation about the C=C bonds. The two aromatic rings are inclined to one another by 74.87 (9) and 75.65 (2)° for compounds (I) and (II), respectively. In the crystal of (I), chains along the b axis are formed via C—H⋯O hydrogen bonds. In the crystal of (II), molecules are linked by C—H⋯O hydrogen bonds, forming sheets parallel to the ac plane. The title compounds, C19H16ClNO5, (I), and C19H15Cl2NO5, (II), both crystallize in the monoclinic space group P21/n. They differ essentially in the orientation of the methyl acetate group, with the C=O bond directed towards the NO2 group in (I) but away from it in (II). In compound (I), the mean plane of the methyl acrylate unit is planar, with a maximum deviation of 0.0044 (2) Å for the methyl C atom, while in (II) this deviation is 0.0147 Å. The interplanar angles between the two aromatic rings are 74.87 (9) and 75.65 (2)° for compounds (I) and (II), respectively. In both compounds, the methyl acrylate and nitrovinyl groups each adopt an E conformation about the C=C bond. In the crystal of (I), molecules are linked by C—H⋯O hydrogen bonds forming chains along the b axis. The chains are linked via C—H⋯Cl hydrogen bonds, forming sheets parallel to the ab plane. The sheets are linked via C—H⋯π interactions, forming a three-dimensional structure. In the crystal of (II), molecules are linked by pairs of C—H⋯O hydrogen bonds, forming inversion dimers with an R22(30) ring motif. The dimers are linked via C—H⋯O hydrogen bonds, forming sheets parallel to the ac plane and enclosing R44(28) ring motifs. The sheets are linked via parallel slipped π–π interactions (intercentroid distances are both ca 3.86 Å), forming a three-dimensional structure.
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Design and development of a piscine collagen blended pullulan hydrogel for skin tissue engineering. RSC Adv 2016. [DOI: 10.1039/c6ra03578g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This present study was designed to prepare a super-absorbent tailor-made collagen–pullulan hydrogel with improved mechanical stability and well-defined biocompatibility for skin tissue engineering.
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Green synthesis of folic acid-conjugated gold nanoparticles with pectin as reducing/stabilizing agent for cancer theranostics. RSC Adv 2016. [DOI: 10.1039/c6ra01698g] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The one pot aqueous green synthesis of gold nanoparticles (GNPs) decorated with folic acid and loaded with doxorubicin suitable for anti-cancer drug delivery was potentially promising as a new therapeutic system for cancer treatment.
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Fabrication and characterization of a collagen coated electrospun poly(3-hydroxybutyric acid)–gelatin nanofibrous scaffold as a soft bio-mimetic material for skin tissue engineering applications. RSC Adv 2016. [DOI: 10.1039/c5ra19529b] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The collagen coated nanofibrous scaffold mimics the function of the extra cellular matrix with good biocompatibility, cell adhesion, cell proliferation and aids to provide as a promising tool in skin tissue engineering application.
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Facile synthesis and evaluation of quercetin reduced and dextran sulphate stabilized gold nanoparticles decorated with folic acid for active targeting against breast cancer. RSC Adv 2016. [DOI: 10.1039/c6ra01756h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The synthesized gold nanoparticles (GNPs) exhibited higher potential to induce cell cycle arrest at G2/M phase with better therapeutic activity against cancer cells but also leads to reduction in the toxic effect of cancer drugs on normal cells.
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Synthesis of cinnolines via Rh(iii)-catalysed dehydrogenative C–H/N–H functionalization: aggregation induced emission and cell imaging. Org Biomol Chem 2016; 14:1958-68. [DOI: 10.1039/c5ob02045j] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rh(iii) catalysed C–H/N–H functionalization was developed to construct cinnolines. These compounds exhibit prominent fluorescence properties and successfully applied in the cancer cell imaging.
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Crystal structure of 5-(5-chloro-2-hydroxy-benzo-yl)-2-(2-methyl-1H-indol-3-yl)nicotino-nitrile. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2015; 71:o822-3. [PMID: 26594546 PMCID: PMC4645016 DOI: 10.1107/s2056989015018058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/09/2015] [Accepted: 09/26/2015] [Indexed: 11/14/2022]
Abstract
In the title compound, C22H14ClN3O2, the indole unit is essentially coplanar, with a maximum deviation of 0.035 Å for the C atom bearing the methyl group. The central pyridine ring is inclined to the indole ring system by 43.7 (1)°. The dihedral angle between the phenyl ring and the indole ring system is 15.7 (2)°, while that between the phenyl ring and the central pyridine ring is 46.3 (1)°. The molecular structure is stabilized by an intramolecular O—H⋯O hydrogen bonding, forming an S(6) ring motif. In the crystal, molecules are linked via pairs of N—H⋯N hydrogen bonds, forming inversion dimers with an R22(16) ring motif. The crystal structure also features C—H⋯π and π–π interactions [centroid–centroid separation = 3.688 (1) Å].
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In vitro anticancer activity of methyl caffeate isolated from Solanum torvum Swartz. fruit. Chem Biol Interact 2015; 242:81-90. [PMID: 26415618 DOI: 10.1016/j.cbi.2015.09.023] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 09/19/2015] [Accepted: 09/22/2015] [Indexed: 10/23/2022]
Abstract
The present study was undertaken to investigate the anticancer activity of methyl caffeate isolated from Solanum torvum Swartz. fruit and to explore the molecular mechanisms of action in MCF-7 cells. Cytotoxic properties of hexane, ethyl acetate and methanol extracts were carried out against MCF-7 cells using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay. Ethyl acetate extract showed good cytototoxic activities compared to hexane and methanol extracts. Methyl caffeate was isolated from the ethyl acetate extract using column chromatography. Cytotoxic properties of methyl caffeate was investigated against MCF-7, A549, COLO320, HepG-2 and Vero cells. The compound showed potent cytotoxic properties against MCF-7 cells compared to A549, COLO320 and HepG-2 cells. Methyl caffeate significantly reduced cell proliferation and increased formation of fragmented DNA and apoptotic body in MCF-7 cells. Bcl-2, Bax, Bid, p53, caspase-3, PARP and cytochrome c release were detected by western blot analysis. The activities of caspases-3 and PARP gradually increased after the addition of isolated compound. Bcl-2 protein was down regulated; Bid and Bax were up regulated after the treatment with methyl caffeate. Molecular docking studies showed that the compound bound stably to the active sites of poly (ADP-ribose) polymerase-1 (PARP1), B cell CLL/lymphoma-2 (BCL-2), E3 ubiquitin-protein ligase (MDM2) and tubulin. The results strongly suggested that methyl caffeate induced apoptosis in MCF-7 cells via caspase activation through cytochrome c release from mitochondria.
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Synthesis of BF₃ catalyzed Mannich derivatives with excellent ee from phenylpropanolamine, study of their antimicrobial activity and molecular docking. Bioorg Med Chem Lett 2015; 25:4232-8. [PMID: 26296475 DOI: 10.1016/j.bmcl.2015.07.096] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 07/05/2015] [Accepted: 07/31/2015] [Indexed: 01/31/2023]
Abstract
Antimicrobial agents 4a-g and 5a-g with very good potency were synthesized with 100% ee from phenylpropanolamine (norephedrine) by BF3 catalyzed three components one pot Mannich reaction in good yields. Obtained compounds were characterized using spectral techniques. Antimicrobial study of these compounds revealed a good to very high potential activity against tested microbes when compared to standard antimicrobial drugs streptomycin and ketoconazole. These synthesized compounds exhibited significant minimum inhibitory concentration (MIC) values against Gram positive and Gram negative bacteria. Amongst compound 4b, 4c, 4d, 4e, 5a, and 5e exhibited very high potent MIC values against tested twelve bacteria and three fungi when compared to control. When subjected to molecular docking, in silico studies revealed significant binding energies ranging from -7.06 to -8.90 kcal/mol for all obtained compounds towards target receptor DNA topoisomerase IV and amongst compounds 4b and 4d have shown maximum binding energies 8.70 and 8.90 kcal/mol, respectively.
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Crystal structure of 1'-(prop-2-yn-1-yl)-1,4-di-hydro-spiro-[benzo[d][1,3]oxazine-2,3'-indolin]-2'-one. ACTA CRYSTALLOGRAPHICA SECTION E-CRYSTALLOGRAPHIC COMMUNICATIONS 2015; 71:o510-1. [PMID: 26279936 PMCID: PMC4518956 DOI: 10.1107/s2056989015011949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 06/22/2015] [Indexed: 11/11/2022]
Abstract
In the title compound, C18H14N2O2, the six-membered oxazine ring adopts a half-chair conformation and its mean plane makes a dihedral angle of 83.23 (7)° with the pyrrolidine ring of the indoline ring system. In the crystal, molecules are linked via N—H⋯O hydrogen bonds, forming chains along [100]. The chains are linked by C—H⋯π interactions, forming slabs parallel to (001).
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DNA/protein binding, DNA cleavage, cytotoxicity, superoxide radical scavenging and molecular docking studies of copper(ii) complexes containing N-benzyl-N′-aryl-N′′-benzoylguanidine ligands. Inorg Chem Front 2015. [DOI: 10.1039/c4qi00234b] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Copper(ii) complexes containing trisubstituted guanidine ligands were prepared, characterized and evaluated for their biological applications.
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Synthesis, characterization and biological evaluation of chromen and pyrano chromen-5-one derivatives impregnated into a novel collagen based scaffold for tissue engineering applications. RSC Adv 2015. [DOI: 10.1039/c5ra07133j] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The synthesis of novel chromen and pyrano chromen-5-one derivatives (CCN) has obtained in simple experimental method. The CCN and collagen based scaffold showed excellent biological properties to act as biomaterial in tissue engineering application.
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Synthesis of tetra-substituted olefins via annulation by Pd-catalyzed carbopalladation/C–H activation and solid state fluorescence properties. RSC Adv 2015. [DOI: 10.1039/c5ra14621f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
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Synthesis, DNA/protein binding, molecular docking, DNA cleavage and in vitro anticancer activity of nickel(ii) bis(thiosemicarbazone) complexes. RSC Adv 2015. [DOI: 10.1039/c5ra04498g] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Cytotoxic nickel(ii) complexes with an N-substituted isatin thiosemicarbazone were synthesized and their interaction with CT DNA and BSA protein was investigated, which was supported by molecular docking studies.
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Facile synthesis of 2-substituted quinolines and 3-alkynyl-2-aryl-2H-Indazole via SnCl2-mediated reductive cyclization. RSC Adv 2014. [DOI: 10.1039/c4ra09153a] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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28
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Synthesis of Pyrrolo-/Indolo[1,2-a]quinolines and Naphtho[2,1-b]thiophenes from gem-Dibromovinyls and Sulphonamides. Org Lett 2014; 16:4424-7. [DOI: 10.1021/ol5019085] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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29
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Synthesis of new class of spirocarbocycle derivatives by multicomponent domino reaction and their evaluation for antimicrobial, anticancer activity and molecular docking studies. Eur J Med Chem 2014; 83:190-207. [PMID: 24956555 DOI: 10.1016/j.ejmech.2014.05.065] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 05/09/2014] [Accepted: 05/26/2014] [Indexed: 11/30/2022]
Abstract
A series of 25 new spirocarbocycles were synthesized by a three component reaction that involves few cyclic nucleophiles, vinyl malononitriles and aldehydes with variable substitution patterns. All the synthesized compounds were evaluated for their antimicrobial activity and the compounds showed significant activity. Synthesized compounds 4c, 4i and 6i showed good anticancer activity against A549 cancer cell line. Molecular docking studies indicated that compound 4i had the greatest affinity for DNA gyrase receptor than others and compound 6i had the greatest affinity for anaplastic lymphoma kinase (ALK) receptor. These compounds can be better therapeutic agents for microbial and cancer cell lines.
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30
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Synthesis and SAR study of novel anticancer and antimicrobial naphthoquinone amide derivatives. Bioorg Med Chem Lett 2014; 24:3647-51. [PMID: 24913712 DOI: 10.1016/j.bmcl.2014.04.080] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Revised: 04/08/2014] [Accepted: 04/21/2014] [Indexed: 01/10/2023]
Abstract
A series of novel naphthoquinone amide derivatives of the bioactive quinones, plumbagin, juglone, menadione and lawsone, with various amino acids were synthesized. The compounds were characterized by (1)H NMR, (13)C NMR, Mass, IR and elemental analysis. All the compounds were evaluated for their anticancer activity against HeLa and SAS cancer cell lines and 3D-QSAR indicated the presence of electron donating group near sulphur enhanced the activity against HeLa cells. Among the derivatives synthesized, compounds 11f, 10a, 10b and 10g were the most active with IC50 values of 16, 12, 14 and 24.5 μM, respectively. The analogues were also screened for antimicrobial activity against two human bacterial pathogens, the Gram-positive Methicillin resistant Staphylococcus aureus (MRSA) and the Gram-negative Pseudomonas aeruginosa and a human yeast pathogen, Fluconazole resistant Candida albicans (FRCA). Among the synthesized compounds, 8g, 10g and 11g exhibited maximum antibacterial activity towards MRSA and antifungal activity against FRCA in well diffusion method.
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31
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Synthesis, antimicrobial and molecular docking studies of enantiomerically pure N-alkylated β-amino alcohols from phenylpropanolamines. Bioorg Med Chem Lett 2014; 24:3057-63. [PMID: 24894558 DOI: 10.1016/j.bmcl.2014.05.027] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2014] [Revised: 04/23/2014] [Accepted: 05/10/2014] [Indexed: 12/17/2022]
Abstract
Enantiomerically pure N-alkylated β-amino alcohols 1a, 1a', 1c, 1c', 1d, 1d', 1e and 1e', with ee 100% have been synthesized from phenylpropanolamines 2. Effect of the neighboring chiral environment on the newly formed chiral center has been studied experimentally and concluded that the newly formed chiral center's absolute configuration is opposite to the adjacent (α- or β-) chiral environment. The antimicrobial activity of the synthesized β-amino alcohols were screened using in vitro disc diffusion method and variable antimicrobial activities were shown for 1a, 1a', 1c, 1c', 1d, 1d', 1e &1e' and amongst them 1d &1d' exhibited significant activity against bacteria and fungi. In silico studies revealed all the synthesized β-amino alcohols 1a-e and 1a'-e' have shown good binding energies ranging from -7.38 to -6.09 kJ/mol towards the target receptor DNA topoisomerase IV and 1d' has shown maximum binding energy -7.38 kJ/mol.
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32
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Methyl 4-(4-bromo-anilino)-2',5-dioxo-5H-spiro-[furan-2,3'-indoline]-3-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2014; 70:o210-1. [PMID: 24764916 PMCID: PMC3998355 DOI: 10.1107/s1600536814001329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Accepted: 01/19/2014] [Indexed: 11/15/2022]
Abstract
In the title compound, C19H13BrN2O5, the spiro furan ring is almost planar with a maximum deviation of 0.034 (2) Å. The indole unit and the furan ring are normal to each other, making a dihedral angle of 87.82 (8) °. The molecular structure is stabilized by an intramolecular N—H⋯O hydrogen bond, which generates an S(6) ring motif. In the crystal, molecules are linked via pairs of N—H⋯O hydrogen bonds, forming inversion dimers enclosing R22(8) ring motifs.
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33
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Synthesis of Tetrasubstituted Olefins by Palladium-Catalyzed Double Heck Cyclization of Bromoenynes. European J Org Chem 2014. [DOI: 10.1002/ejoc.201301806] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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34
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InCl3-mediated eco-friendly three-component domino reaction for synthesis of highly functionalized triazolylspiroxindolinopyrans and triazolylpyrans under solvent-free conditions. RSC Adv 2014. [DOI: 10.1039/c4ra01524j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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35
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Pd(0)-catalyzed regio- and stereoselective cyclization of alkynes: selective synthesis of (E)-4-(isobenzofuran-1(3H)-ylidene)-1,2,3,4-tetrahydroisoquinolines and aze/oxepinoindoles. Org Biomol Chem 2014; 12:876-80. [DOI: 10.1039/c3ob42314j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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36
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CuI-Catalyzed Coupling of gem-Dibromovinylanilides and Sulfonamides: An Efficient Method for the Synthesis of 2-Amidoindoles and Indolo[1,2-a]quinazolines. Org Lett 2013; 16:484-7. [DOI: 10.1021/ol403365t] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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37
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Methyl 4-anilino-2',5-dioxo-1',2'-di-hydro-5H-spiro-[furan-2,3'-indole]-3-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2013; 69:o1055. [PMID: 24046629 PMCID: PMC3772486 DOI: 10.1107/s1600536813014967] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Accepted: 05/30/2013] [Indexed: 11/15/2022]
Abstract
In the title compound, C19H14N2O5, the spiro junction links an oxindole moeity and a furan ring, which subtend a dihedral angle of 83.49 (6)°. The molecular structure features an N—H⋯O hydrogen bond, which generates an S(6) ring motif. The crystal packing is governed by two N—H⋯O interactions, one of which generates a centrosymmetric R22(14) dimer. The other N—H⋯O interaction along with a C—H⋯O hydrogen bond contributes to the formation of a C22[R22(9)] dimeric chain running along the b-axis direction.
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38
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Facile one-pot synthesis of novel dispirooxindole-pyrrolidine derivatives and their antimicrobial and anticancer activity against A549 human lung adenocarcinoma cancer cell line. Bioorg Med Chem Lett 2013; 23:1839-45. [PMID: 23395665 DOI: 10.1016/j.bmcl.2013.01.023] [Citation(s) in RCA: 147] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Revised: 01/01/2013] [Accepted: 01/04/2013] [Indexed: 11/20/2022]
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39
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Tetrasubstituted Olefinic Xanthene Dyes: Synthesis via Pd-Catalyzed 6-exo-dig Cyclization/C–H Activation of 2-Bromobenzyl-N-propargylamines and Solid State Fluorescence Properties. Org Lett 2013; 15:382-5. [DOI: 10.1021/ol303326g] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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40
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2-Iodo-3-(4-meth-oxy-anilino)-5,5-dimethyl-cyclo-hex-2-en-1-one. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o506. [PMID: 22347107 PMCID: PMC3275251 DOI: 10.1107/s1600536812002255] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 01/18/2012] [Indexed: 11/17/2022]
Abstract
The cyclohexene ring in the title compound, C15H18INO2, adopts a sofa conformation. The dihedral angle between the cyclohexene (through all ring atoms) and benzene rings is 63.3 (1)°. The molecular conformation features an N—H⋯I short contact and the crystal packing features C—H⋯O hydrogen bonds.
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41
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Ethyl 2-benzyl-3-[3-(4-chloro-phen-yl)-1-phenyl-1H-pyrazol-4-yl]-4,6-dioxo-5-phenyl-octa-hydro-pyrrolo-[3,4-c]pyrrole-1-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o552. [PMID: 22347143 PMCID: PMC3275287 DOI: 10.1107/s1600536812002450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Accepted: 01/19/2012] [Indexed: 11/11/2022]
Abstract
The title compound, C(37)H(31)ClN(4)O(4), crystallizes with two mol-ecules (A and B) in the asymmetric unit. The pyrrole rings in both mol-ecules are connected via cis fusion, whereas one ring has a twisted conformation and the other assumes a half-chair conformation. In the crystal, the A mol-ecules form inversion dimers via a pair of C-H⋯Cl inter-actions, while the B mol-ecules form chains propagating in [1[Formula: see text]0], via C-H⋯O inter-actions. In the crystal, there are also a number of C-H⋯π inter-actions present.
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42
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2-Methyl-3-{2-nitro-1-[2-(prop-2-yn-1-yl-oxy)phen-yl]eth-yl}-1H-indole. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o2658. [PMID: 22058778 PMCID: PMC3201230 DOI: 10.1107/s1600536811036907] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2011] [Accepted: 09/12/2011] [Indexed: 11/10/2022]
Abstract
In the title compound, C20H18N2O3, the indole unit is essentially planar, with a maximum deviation of 0.0197 (18) Å for the N atom and forms a dihedral angle of 78.09 (9)° with the propyne-subsituted phenyl ring. The propyne group is almost linear, the C—C C angle being 176.5 (2)°, and is also in the flagpole position on the O atom. In the crystal, molecules are linked via N—H⋯O and C—H⋯O intermolecular hydrogen bonds involving the nitro-group O atoms as acceptors.
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43
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Practical synthesis, anticonvulsant, and antimicrobial activity of N -allyl and N -propargyl di(indolyl)indolin-2-ones. Bioorg Med Chem Lett 2011; 21:4072-7. [DOI: 10.1016/j.bmcl.2011.04.117] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2011] [Revised: 04/23/2011] [Accepted: 04/25/2011] [Indexed: 11/16/2022]
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44
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Gold(III) chloride catalyzed regioselective synthesis of pyrano[3,4-b]indol-1(9H)-ones and evaluation of anticancer potential towards human cervix adenocarcinoma. Bioorg Med Chem Lett 2011; 21:4170-3. [DOI: 10.1016/j.bmcl.2011.05.088] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Revised: 05/22/2011] [Accepted: 05/24/2011] [Indexed: 10/18/2022]
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45
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5-(3-Methyl-phen-yl)-3-phenyl-1,2-oxazole. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o1575. [PMID: 21836986 PMCID: PMC3151775 DOI: 10.1107/s1600536811020198] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2011] [Accepted: 05/26/2011] [Indexed: 11/24/2022]
Abstract
In the title compound, C16H13NO, the isoxazole ring makes dihedral angles of 16.64 (7)° with 3-methylphenzyl ring and 17.60 (7)° with the unsubstituted phenyl ring.
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46
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cis-6-Bromo-4-(1-methyl-1H-indol-3-yl)-10,10a-dihydro-1H,4H-2,9-dioxa-3-aza-benz[f]azulene. Acta Crystallogr Sect E Struct Rep Online 2011; 67:o517. [PMID: 21523167 PMCID: PMC3051555 DOI: 10.1107/s1600536811003084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Accepted: 01/24/2011] [Indexed: 11/10/2022]
Abstract
In the title compound, C(20)H(17)BrN(2)O(2), the seven-membered oxepine ring adopts a chair conformation. The indole moiety is essentially planar with a maximum deviation of 0.031 (3)Å. The indole ring system forms a dihedral angle of 21.87 (8)° with the mean plane of the 10-membered heterobicycle. The crystal packing is stabilized by inter-molecular C-H⋯O and C-H⋯π inter-actions.
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47
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Regioselective synthesis of phthalans via Cu(OTf)2-catalyzed 5-exo-dig intramolecular hydroalkoxylation of 2-(ethynyl)benzyl alcohols. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.07.030] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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Synthesis, antibacterial activity evaluation and QSAR studies of novel dispiropyrrolidines. Eur J Med Chem 2010; 45:3446-3452. [PMID: 20556891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A series of novel dispiropyrrolidines have been synthesized through 1,3-dipolar cycloaddition of an azomethine ylide generated from sarcosine and isatin with the dipolarophile 3-benzylidene-1-methyl-pyrrolidine-2,5-dione. Their antibacterial activity was evaluated against Bacillus subtilis NCIM 2718, Staphylococcus aureus NCIM5021, Salmonella typhi NCIM2501, Pseudomonas aeruginosa NCIM 5029 and Proteus vulgaris NCIM2813 by two fold dilution method. Compound 6e exhibits reasonably good activity and compound 6c exhibits poor activity against all the organisms. The QSAR's were developed for all antibacterial activities. The models had either one or two descriptors (r2 = 0.81-0.97, , q2 = 0.57-0.92, F-ratio = 12.73-162.76). Topology, shape, charge distribution and hydrophobic nature of the molecules had pronounced effect on their antibacterial activity.
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49
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tert-Butyl 3-(8-bromo-4H,10H-1,2-oxazolo[4,3-c][1]benzoxepin-10-yl)-2-methyl-1H-indole-1-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o2035. [PMID: 21588344 PMCID: PMC3007347 DOI: 10.1107/s1600536810027297] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2010] [Accepted: 07/09/2010] [Indexed: 11/10/2022]
Abstract
In the title compound, C25H23BrN2O4, the seven-membered ring adopts a twisted-boat conformation. The indole ring system is planar within 0.021 (2) Å and the ester group [–C(=O)—O—C–] is almost coplanar with it [dihedral angle = 3.0 (2)°]. The conformation of the ester group is influenced by intramolecular C—H⋯O interactions. In the crystal structure, molecules are linked into chains along the b axis by C—H⋯N hydrogen bonds.
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50
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Synthesis, antibacterial activity evaluation and QSAR studies of novel dispiropyrrolidines. Eur J Med Chem 2010; 45:S0223-5234(10)00317-X. [PMID: 20580853 DOI: 10.1016/j.ejmech.2010.04.035] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Revised: 04/28/2010] [Accepted: 04/30/2010] [Indexed: 11/18/2022]
Abstract
A series of novel dispiropyrrolidines have been synthesized through 1,3-dipolar cycloaddition of an azomethine ylide generated from sarcosine and isatin with the dipolarophile 3-benzylidene-1-methyl-pyrrolidine-2,5-dione. Their antibacterial activity was evaluated against Bacillus subtilis NCIM 2718, Staphylococcus aureus NCIM5021, Salmonella typhi NCIM2501, Pseudomonas aeruginosa NCIM 5029 and Proteus vulgaris NCIM2813 by two fold dilution method. Compound 6e exhibits reasonably good activity and compound 6c exhibits poor activity against all the organisms. The QSAR's were developed for all antibacterial activities. The models had either one or two descriptors (r(2) = 0.81-0.97, r(adj)(2)=0.75-0.96, q(2) = 0.57-0.92, F-ratio = 12.73-162.76). Topology, shape, charge distribution and hydrophobic nature of the molecules had pronounced effect on their antibacterial activity.
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