Crystal structure of 3-(adamantan-1-yl)- 4-(4-chlorophenyl)-1H-1,2,4-triazole- 5(4H)-thione

The title compound, C18H20ClN3S, is a functionalized triazoline- 3-thione derivative. The benzene ring is almost perpendicular to the planar 1,2,4-triazole ring [maximum deviation = 0.007 (1) A ° ] with a dihedral angle of 89.61 (5)� between them and there is an adamantane substituent at the 3-position of the triazolethione ring. In the crystal, N—H� � �S hydrogenbonding interactions link the molecules into chains extending along the c-axis direction. The crystal packing is further stabilized by weak C—H� � �� interactions that link adjacent chains into a two-dimensional structure in the bc plane. The crystal studied was an inversion twin with a 0.50 (3):0.50 (3) domain ratio

Anti-Inflammatory Screening and Molecular Modeling of Some Novel Coumarin Derivatives

Coumarin and their derivatives have drawn much attention in the pharmacological and pharmaceutical fields due to their broad range and diverse biological activities. In the present work, starting from the 6-amino-7-hydroxy-4-methyl-2H-chromen-2-one, a series of 6-(substituted benzylamino)-7-hydroxy-4-methyl-2H-chromen-2-ones 1–11 was synthesized and assessed for their anti-inflammatory activity using the carrageenan-induced hind paw edema method. Compounds 2, 3, 4 and 9 showed significant (p < 0.001) reduction of rat paw edema volume after 1 h from the administration of the carrageenan compared to the reference drug, indomethacin. On the other hand, compounds 4 and 8 showed the highest anti-inflammatory activity, surpassing indomethacin after 3 h with 44.05% and 38.10% inhibition, respectively. Additionally, a molecular docking study was performed against the COX enzyme using the MOE 10.2010 software

Synthesis, Spectroscopic Characterization and Antimicrobial Potential of Certain New Isatin-Indole Molecular Hybrids

Molecular hybridization has a wide application in medicinal chemistry to obtain new biologically active compounds. New isatin-indole molecular hybrids 5a–n have been synthesized and characterized by various spectroscopic tools. The in vitro antimicrobial potential of the prepared compounds 5a–n was assessed using diameter of the inhibition zone (DIZ) and minimum inhibitory concentration (MIC) assays against a panel of Gram-negative bacteria, Gram-positive bacteria and fungi. Most of the synthesized compounds 5a–n showed weak activities against Gram-negative bacteria while compounds 5b and 5c exhibited good activities against Gram-positive bacteria. On the other hand, compound 5j emerged as the most active compound towards Candida albicans (C. albicans), with an MIC value of 3.9 µg/mL, and compound 5g as the most active congener towards Asperagillus niger (A. niger), with an MIC value of 15.6 µg/mL. Moreover, compound 5h manifested the best anti-P. notatum effect, with an MIC value of 7.8 µg/mL, making it equipotent with compound 5g

Synthesis of curcumin and ethylcurcumin bioconjugates as potential antitumor agents

We appreciate very much the help of Dr. Abeer El-Alfy, Pharmacology Department, King Saud University and Dr. Shabana Khan, National center for Natural Products Research, University of Mississipi, USA, for performing the Cytotoxicity Tests.Some new curcumin and ethylcurcumin bioconjugates with various functionalities supported on the curcumin skeleton were synthesized and evaluated for antitumor activity. Most of the newly synthesized compounds are more active than curcumin and ethyl curcumin but are less cytotoxic than the reference compound doxorubicin. Surprisingly, many of these compounds are not cytotoxic to noncancer cells. Compounds 5c, 5e, 5g, 5j, 6b, and 6g having 5-methylthiadiazole, 6-methoxy-benzothiazole, diethylaminoethyl and the usual alkylating bis(2chloroethyl)amino moieties showed the highest cytotoxic activity against SK-MEL cancer cells. Compounds 5k, 6c, and 6g are less cytotoxic to KB cancer cells. Moreover, compounds 5c, 5e, 5j, 5k, 6d, 6e, 6f, and 6g showed cytotoxicity against BT-549 cancer cells with 5j being the most active compound. Curcumin and the new intermediate di-O-chloroacetylcurcumin (3a) were also cytotoxic against the same cell line but are less active than the target compounds. Compound 6b is the only one exhibiting cytotoxicity against SK-OV-3 cancer cells.Springer Scienc

3-Ethoxymethyl-1,4-dihydroquinolin-4-one

In the title molecule, C12H13NO2, the dihydroquinolinone fused-ring system is nearly planar [maximum deviation = 0.012 (3) Å], and the mean plane passing through the extended ethoxymethyl substituent is aligned at 86.9 (2)° with respect to the fused-ring system. In the crystal, adjacent molecules are linked by an N—H...Ocarbonyl hydrogen bond to generate a chain running along the b-axis direction

A combined experimental and theoretical study on vibrational and electronic properties of (5-methoxy-1H-indol-1-yl)(5-methoxy-1H-indol-2-yl)methanone

(5-Methoxy-1H-indol-1-yl)(5-methoxy-1H-indol-2-yl)methanone (MIMIM) is a bis-indolic derivative that can be used as a precursor to a variety of melatonin receptor ligands. In this work, the energetic and spectroscopic profiles of MIMIM were studied by a combined DFT and experimental approach. The IR, Raman, UV-Vis, 1H NMR and 13C NMR spectra were calculated by PBEPBE and B3LYP methods, and compared with experimental ones. Results showed good agreement between theoretical and experimental values. Mulliken population and natural bond orbital analysis were also performed by time-dependent DFT approach to evaluate the electronic properties of the title molecule

Synthesis and Spectroscopic Identification of Certain Imidazole-Semicarbazone Conjugates Bearing Benzodioxole Moieties: New Antifungal Agents

During the last three decades the extent of life-threatening fungal infections has increased remarkably worldwide. Synthesis and structure elucidation of certain imidazole-semicarbazone conjugates 5a–o are reported. Single crystal X-ray analysis of compound 5e unequivocally confirmed its assigned chemical structure and the (E)-configuration of its imine double bond. Compound 5e crystallized in the triclinic system, P-1, a = 6.3561 (3) Å, b = 12.5095 (8) Å, c = 14.5411 (9) Å, α = 67.073 (4)°, β = 79.989 (4)°, γ =84.370 (4)°, V = 1048.05 (11) Å3, Z = 2. In addition, DIZ and MIC assays were used to examine the in vitro antifungal activity of the title conjugates 5a–o against four fungal strains. Compound 5e, bearing a 4-ethoxyphenyl fragment, showed the best MIC value (0.304 µmol/mL) against both C. tropicalis and C. parapsilosis species, while compounds 5c (MIC = 0.311 µmol/mL), 5k, and 5l (MIC = 0.287 µmol/mL) exhibited the best anti-C. albicans activity

QSAR-based rational discovery of novel substituted-4′-iminospiro[indoline-3,3′-[1,2,5]thiadiazolidinyl]-2-one 1′,1′-dioxide with potent in vitro anticancer activity

Abstract Recent studies have suggested that aldose reductase inhibition preferentially inhibits the growth of cancer cells. However, the investigations of this issue are not many. Novel nine substituted- 4′-iminospiro[indoline-3,3′-[1,2,5] thiadiazolidinyl]-2-one 1′,1′-dioxide derivatives were designed by both isosteric replacement of the imidazolidine-2,5-dione moiety in spirohydantoin scaffold and conformational rigidification approaches. A QSAR with high predictive power (r2 = 0.99) was created from a series of potent aldose reductase inhibitors and was used to predict the activity of our new compounds. Compound 5 showed the best docking score (− 33.24 kcal/mol) with the least RMSD value (< 1.5) obtained by molecular dynamic simulations over 20 ns. All compounds showed promising anticancer activities especially compound 5 that achieved the highest inhibitory activities with IC50; 0.013, 0.031, 0.064, and 0.048 mmol/L against breast, colon, prostate, and lung cell lines respectively. The discovery of this lead compound confirmed the rational design. Further investigations may be required for optimization of this compound

Synthesis, Single Crystal X-ray Analysis, and Antifungal Profiling of Certain New Oximino Ethers Bearing Imidazole Nuclei

Fungal infections threaten human health, particularly in immune-compromised patients worldwide. Although there are a large number of antifungal agents available, the desired clinical attributes for the treatment of fungal infections have not yet been achieved. Azoles are the mainstay class of the clinically used antifungal agents. In the current study, the synthesis, spectroscopic characterization, and antifungal activity of certain new oximino ethers Va–n bearing imidazole nuclei are reported. The (E)-configuration of the imine double bond of the synthesized compounds Va–n has been confirmed via single crystal X-ray analysis of compound Vi as a representative example of this class of compounds. The molecular structure of compound Vi was crystallized in the monoclinic, P21/c, a = 18.7879(14) Å, b = 5.8944(4) Å, c = 16.7621(12) Å, β = 93.063(3)°, V = 1855.5(2) Å3, Z = 4. The in vitro antifungal activity of the synthesized compounds Va–n were evaluated using diameter of the inhibition zone (DIZ) and minimum inhibitory concentration (MIC) assays against different fungal strains. Compound Ve manifested anti-Candida albicans activity with an MIC value of 0.050 µmol/mL, being almost equipotent with the reference antifungal drug fluconazole (FLC),while compounds Vi and Vn are the most active congeners against Candida parapsilosis, being equipotent and about twenty-three times more potent than FLC with an MIC value of 0.002 µmol/mL. The results of the current report might support the development of new potent and safer antifungal azoles