Physico-chemical properties of Priestia endophytica UCM B-5715 fluorescent pigments.

The endophytic bacterium Priestia endophytica (Bacillus endophyticus) UCM B-5715 (= DSM 13796) has been found to produce a distinctive pink pigment exhibiting vibrant yellow fluorescence. Investigation of the pigment extract revealed the presence of 2 non-polar fluorescent-colored compounds, with molecular masses of 376 (14.12 %) and 410 (82.

Nature-inspired Novel Quaternary Ammonium Compounds: Synthesis, Antibacterial and Antibiofilm Activity.

Inspired by marine compounds isolated from sponges and the increased need for new effective antimicrobials, novel quaternary ammonium compounds with long alkyl chains (C8-C12) were designed and synthesized. Antibacterial and antibiofilm activity of new compounds was evaluated against six microbial strains (S. aureus, E.

Divergent Synthesis of Novel 3(5)-Aminoazole-Benzopyrone Hybrids and their Evaluation as α-Glucosidase Inhibitors.

An efficient approach has been developed for the trapping in situ generated benzopyrone-based ortho-quinone methide intermediates by 3- and 5-amino pyrazoles or isoxazoles. In cases of naturally occurring phenolic Mannich bases, hybrid compounds between the azole and flavonoid, namely, coumarin, chromone, isoflavone, and aurone were synthesized in moderate to good yields. It is remarkable that depending on 3- or 5-position of the amino group, the reaction led to the formation of C-4 or 3-NH substituted azole derivatives, respectively.

Design, Synthesis, and Antitumor Potential of New Thiazole--contained 5-Fluoro-2-Oxindole Derivatives as Sunitinib Analogues.

Background: Indole is considered the most promising scaffold for anticancer drug design due to its high bioavailability, unique chemical properties, and broad spectrum of pharmacological action.

Objective: Twelve novel thiazole-containing the 5-fluoro-1,3-dihydro-2H-indol-2-one derivatives as sunitinib analogs were designed and synthesized, and their anticancer activity was evaluated against the NCI-60 cancer cell lines.

Method: The thiazole-contained 5-fluoro-1,3-dihydro-2H-indol-2-one derivatives were synthesized using Knoevenagel condensation of 1,3-thiazole-5-carboxylic acid 1.

Synthesis and Acetylcholinesterase Inhibitory Activity of Novel Trilaciclib Analogs.

Trilaciclib is a CDK4/6 inhibitor, used to treat the bone marrow damage in chemotherapy patients. A series of thirteen novel structural trilaciclib analogs was obtained to evaluate their activity against acetylcholinesterase. An effective method for the synthesis of 4,7-substituted 8,9-dihydropyrazino[1',2':1,5]pyrrolo[2,3-d]pyrimidine derivatives from a new methyl 4-chloro-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylate was developed.

Trapping of thermally generated - and -quinone methides by imidazoles and pyrazoles: a simple route to green synthesis of benzopyrone-azole hybrids and their evaluation as α-glucosidase inhibitors.

An efficient green approach for the trapping of generated -and -quinone methide intermediates by imidazoles and pyrazoles has been developed. A wide range of quinone methide precursors based on simple phenols are compatible with the experimental protocol under mild thermal conditions. This methodology was demonstrated to be suitable for the synthesis of methylene-linked benzopyrone-azole hybrids using naturally occurring coumarin and chromone Mannich bases.

Halochromic Bacterial Cellulose/Anthocyanins Hybrid Polymer Film with Wound-Healing Potential.

Polymer-based dressings deriving from natural biomaterials have advantages such as nontoxicity, biocompatibility, and mechanical stability, which are essential for efficient wound healing and microbial infection diagnostics. Here, we designed a prototype of an intelligent hydrogel dressing on the base of bacterial cellulose (BC) for monitoring wound microbial infection due to the uploaded natural pH dye-sensor, anthocyanins (ANC) of elderberry fruit ( L.).

Generation of multimillion chemical space based on the parallel Groebke-Blackburn-Bienaymé reaction.

Parallel Groebke-Blackburn-Bienaymé reaction was evaluated as a source of multimillion chemically accessible chemical space. Two most popular classical protocols involving the use of Sc(OTf) and TsOH as the catalysts were tested on a broad substrate scope, and prevalence of the first method was clearly demonstrated. Furthermore, the scope and limitations of the procedure were established.

Design, Synthesis, and Xanthine Oxidase Inhibitory Activity of 4-(5-Aminosubstituted-4-cyanooxazol-2-yl)benzoic Acids.

Xanthine oxidase is a known therapeutic target for the treatment of hyperuricemia and related diseases. Despite the availability of current drugs such as allopurinol and febuxostat, the search for new compounds to effectively inhibit this enzyme remains relevant. In our study, 75 virtual structures of 4-(5-aminosubstituted-4-cyanooxazol-2-yl)benzoic acids with structural similarity to febuxostat were designed for evaluation of their potency against xanthine oxidase.

Synthetic Amine Linkers for Efficient Sortagging.

Enzymatic site-specific bioconjugation techniques, in particular sortase-mediated ligation, are increasingly used to generate conjugated proteins for a wide array of applications. Extension of the utility and practicality of sortagging for diverse purposes is critically dependent on further improvement of the efficiency of sortagging reactions with a wider structural variety of substrates. We present a comprehensive comparative mass spectrometry screening study of synthetic nonpeptidic incoming amine nucleophile substrates of Sortase A enzyme.

Thiazolium salt mimics the non-coenzyme effects of vitamin B in rat synaptosomes.

Long-term studies have confirmed a causal relationship between the development of neurodegenerative processes and vitamin B (thiamine) deficiency. However, the biochemical mechanisms underlying the high neurotropic activity of thiamine are not fully understood. At the same time, there is increasing evidence that vitamin B, in addition to its coenzyme functions, may have non-coenzyme activities that are particularly important for neurons.

Synthesis, Characterization, In Vitro Anticancer Evaluation, ADMET Properties, and Molecular Docking of Novel 5-Sulfanyl Substituted (Thiazol-4-yl)-Phosphonium Salts.

Seven TPP+ new 5-sulfanyl substituted (thiazol-4-yl) phosphonium salts functionalized with different substituents were designed, synthesized, and studied against the NCI-60 human cancer cell lines. Compounds 1-4 show the total average parameters GI=0.7-2.

In Silico Design and In Vitro Assessment of Bicyclic Trifluoromethylated Pyrroles as New Antibacterial and Antifungal Agents.

QSAR studies on the number of compounds tested as S. aureus inhibitors were performed using an interactive Online Chemical Database and Modeling Environment (OCHEM) web platform. The predictive ability of the developed consensus QSAR model was q=0.

2-Oxabicyclo[2.1.1]hexanes: Synthesis, Properties, and Validation as Bioisosteres of ortho- and meta-Benzenes.

We have developed a general and practical approach towards 2-oxabicyclo[2.1.1]hexanes with two and three exit vectors via an iodocyclization reaction.

Mechanochemical Birch Reduction with Low Reactive Alkaline Earth Metals.

Birch reduction and similar dissolved metal-type transformations hold significant importance in the organic synthesis toolbox. Historically, the field has been dominated by alkali metal reductants. In this study, we report that largely neglected, low-reactive alkaline earth metals can become powerful and affordable reductants when used in a ball mill under essentially solvent-free conditions, in the presence of ethylenediamine and THF as liquid additives.

Synthesis and in vitro evaluation of antibacterial and antibiofilm activities of novel triphenylphosphonium-functionalized substituted pyrimidines.

The increase in the prevalence of antibiotic-resistant pathogens leads to a decrease in the number of antimicrobial agents for the treatment of infections and prompts researchers to search for new effective antimicrobial drugs. This study reports the synthesis of novel triphenylphosphonium-functionalized substituted pyrimidines and in vitro evaluation of their antibacterial and antibiofilm activity. Most of the synthesized derivatives showed high antibacterial activity (MIC = 0.

Strain-specific features of Pleurotus ostreatus growth in vitro and some of its biological activities.

Background: The production of Pleurotus ostreatus mycelium as a promising object for use in food and other industries is hampered by a lack of information about the strain-specificity of this fungus mycelium growth and its acquisition of various biological activities. Therefore, this research aimed to investigate mycelial growth of different P. ostreatus strains on varies solid and liquid media as well as to evaluate strains antagonistic, antibacterial, antiradical scavenging activities, and total phenolic content.

Spiro[3.3]heptane as a Saturated Benzene Bioisostere.

The spiro[3.3]heptane core, with the non-coplanar exit vectors, was shown to be a saturated benzene bioisostere. This scaffold was incorporated into the anticancer drug sonidegib (instead of the meta-benzene), the anticancer drug vorinostat (instead of the phenyl ring), and the anesthetic drug benzocaine (instead of the para-benzene).

Anticancer activity features of imidazole-based ionic liquids and lysosomotropic detergents: in silico and in vitro studies.

Long-chain imidazole-based ionic liquids (compounds 2, 4, 9) and lysosomotropic detergents (compounds 7, 3, 8) with potent anticancer activity were synthesized. Their inhibitory activities against neuroblastoma and leukaemia cell lines were predicted by the new in silico QSAR models. The cytotoxic activities of the synthesized imidazole derivatives were investigated on the SK-N-DZ (human neuroblastoma) and K-562 (human chronic myeloid leukaemia) cell lines.

Synthesis, characterization of novel N-(4-cyano-1,3-oxazol-5-yl)sulfonamide derivatives and in vitro screening their activity against NCI-60 cancer cell lines.

A novel series of N-(4-cyano-1,3-oxazol-5-yl)sulfonamides have been synthesized and characterized by IR, H NMR, C NMR spectroscopy, elemental analysis and chromato-mass-spectrometry. The anticancer activities of all newly synthesized compounds were evaluated via a single high-dose assay (10 μM) against 60 cancer cell lines by the National Cancer Institute (USA) according to its screening protocol. Among them, compounds 2 and 10 exhibited the highest activity against the 60 cancer cell lines panel in the one-dose assay.

1,2-Disubstituted bicyclo[2.1.1]hexanes as saturated bioisosteres of -substituted benzene.

Bicyclo[2.1.1]hexanes have been synthesized, characterized, and biologically validated as saturated bioisosteres of the -substituted benzene ring.

Docking for EP4R antagonists active against inflammatory pain.

The lipid prostaglandin E (PGE) mediates inflammatory pain by activating G protein-coupled receptors, including the prostaglandin E2 receptor 4 (EP4R). Nonsteroidal anti-inflammatory drugs (NSAIDs) reduce nociception by inhibiting prostaglandin synthesis, however, the disruption of upstream prostanoid biosynthesis can lead to pleiotropic effects including gastrointestinal bleeding and cardiac complications. In contrast, by acting downstream, EP4R antagonists may act specifically as anti-inflammatory agents and, to date, no selective EP4R antagonists have been approved for human use.

In Silico, in Vitro and in Vivo Study of Substituted Imidazolidinone Sulfonamides as Antibacterial Agents.

New substituted imidazolidinone sulfonamides have been developed using a rational drug design strategy. Predictive QSAR models for the search of new antibacterials were created using the OCHEM platform. Regression models were applied to verify a virtual chemical library of new imidazolidinone derivatives designed to have antibacterial activity.