DMSO-KSO mediated iodine-free conversion of glycal C-3 ether to 3-enopyranones: synthesis of furo[3,2-] pyrans.

A straightforward, highly efficient, and regioselective method for directly converting 3--benzylated and silylated glycals into their corresponding enones has been developed using a DMSO-KSO reagent system. This reaction is scalable to gram quantities under mild conditions, achieving up to 80% yields. The resulting enones are valuable intermediates for the synthesis of furo[3,2-] pyrans, which are integral components of various biologically significant scaffolds.

Discovery of Ring-Annulated Analogues of Cannabidiol as Potential Anticancer Agents: Synthesis and Biological Evaluation.

Cannabidiol (CBD) is a nonpsychoactive cannabinoid derived from and its potential therapeutic effects extend beyond its well-known antiepileptic properties. Exploring CBD and its analogues as anticancer agents has gained significant attention in recent years. In this study, a series of novel ring-annulated analogues of CBD with oxazinyl moiety were synthesized and evaluated for their antiproliferative effect.

Peroxodisulfate-assisted synthesis of 2-thiocyanato glycals and their transformation to C-2-thio acrylo/aryl nitrile-substituted glycals.

An efficient regioselective method to attach thiocyanato groups at the β-position of enol double bonds in sugar enol ethers using KSCN and potassium persulfate has been developed. The highly regioselective addition of the resulting sugar thiocyanate to electron rich species like terminal alkynes and benzynes under Pd catalysis generated C-2-thio acrylo/aryl nitrile glycals simultaneous introduction of thio and cyano groups into carbon-carbon triple bonds.

Integrated transcriptomic and physio-molecular studies unveil the melatonin and PGPR induced protection to photosynthetic attributes in Brassica juncea L. under cadmium toxicity.

Cd is highly mobile, non-essential trace element, that has become serious environmental issue due to its elevated concentration in soil. The present study was taken up to work out salutary effect of melatonin (Mlt) and PGPR ((Pseudomonas putida (Pp), Pseudomonas fluorescens (Pf) in 10 days old Cd stressed (0.3 mM) Brassica juncea L.

Current status of diagnostic assays for emerging zoonotic viruses: Nipah and Hendra.

Introduction: Nipah and Hendra viruses belong to the Paramyxoviridae family, which pose a significant threat to human health, with sporadic outbreaks causing severe morbidity and mortality. Early symptoms include fever, cough, sore throat, and headache, which offer little in terms of differential diagnosis. There are no specific therapeutics and vaccines for these viruses.

Development and Validation of Fast and Sensitive RP-HPLC Stability-Indicating Method for Quantification of Piroxicam in Bulk Drug.

A simple, rapid, sensitive, and cost-effective green solvent-assisted reverse-phase high-performance liquid chromatographic technique, coupled with a photodiode array detector, was developed and validated for the estimation of piroxicam (PRXM). The chromatographic separation was achieved by using a C-18 (250 × 4.6) mm, 5-μm stationary phase and a mobile phase consisting of methanol and 0.

Cannabidiol-Based Prodrugs: Synthesis and Bioevaluation.

Cannabidiol (CBD ) is a nonpsychotic cannabinoid-based drug approved by the U.S. FDA for treating refractory epilepsy, namely, Lennox-Gastaut and Dravet syndrome.

The way forward to produce nutraceuticals from agri-food processing residues: obstacle, solution, and possibility.

Food matrices contain bioactive compounds that have health benefits beyond nutritional value. The bulk of bioactive chemicals are still present in agro-industrial by-products as food matrices. Throughout the food production chain, there is a lot of agro-industrial waste that, if not managed effectively, could harm the environment, company, and how nutritiously and adequately people eat.

Phytotherapeutics in Cancer: From Potential Drug Candidates to Clinical Translation.

Annually, a significant number of individuals succumb to cancer, an anomalous cellular condition characterized by uncontrolled cellular proliferation and the emergence of highly perilous tumors. Identifying underlying molecular mechanism(s) driving disease progression has led to various inventive therapeutic approaches, many of which are presently under pre-clinical and/or clinical trials. Over the recent years, numerous alternative strategies for addressing cancer have also been proposed and put into practice.

Exploring the Antibacterial Potential of Semisynthetic Phytocannabinoid: Tetrahydrocannabidiol (THCBD) as a Potential Antibacterial Agent against Sensitive and Resistant Strains of .

Antimicrobial resistance (AMR) is one of the most challenging problems and is responsible for millions of deaths every year. We therefore urgently require new chemical entities with novel mechanisms of action. Phytocannabinoids have been adequately reported for the antimicrobial effect but not seriously pursued because of either stringent regulatory issues or poor drug-like properties.

Plant salinity stress, sensing, and its mitigation through WRKY.

Salinity or salt stress has deleterious effects on plant growth and development. It imposes osmotic, ionic, and secondary stresses, including oxidative stress on the plants and is responsible for the reduction of overall crop productivity and therefore challenges global food security. Plants respond to salinity, by triggering homoeostatic mechanisms that counter salt-triggered disturbances in the physiology and biochemistry of plants.

Metal-Free Tunable 1,2-Difunctionalization of Terminal Alkynes: Synthesis of β-Substituted α,β-Unsaturated Ketones.

A metal-free tunable 1,2-difunctionalization of the terminal alkynes showcasing a tandem installation of C-C and C-S bonds has been developed. The key enabling factor for the approach is the use of acetic acid as an acyl source to synthesize β-substituted α,β-unsaturated ketones. The reaction at room temperature leads to the regioselective acylation at the terminal carbon of alkynes, whereas at -78 °C, the acylation occurs at the more substituted carbon.

Pd-catalyzed synthesis of hetero 1,2-interlinked -disaccharides by coupling of glycals with glycals.

A facile synthesis of C1-C2 interlinked disaccharides is achieved from readily available -glycals and unsubstituted glycals. Ester-protected donors reacted with ether-protected acceptors under Pd-Ag catalysis to access -disaccharides bearing C-3 vinyl ether, which upon ring opening by Lewis acid furnished pi-extended conjugated orthogonally protected chiral ketones. Benzyl deprotection and reduction of the double bonds resulted in a fully saturated disaccharide stable toward acid hydrolysis.

Utilization of xylose enriched extract from spent lemongrass hydrolysate for clavulanic acid production using Streptomyces clavuligerus (MTCC 1142).

The main goal of this study was to provide possible alternative production medium containing xylose enriched spent lemongrass hydrolysate with glycerol as a feedstock and corn gluten meal as a nitrogen source for their ability to support the cell growth of the Streptomyces clavuligerus MTCC 1142 for the production of clavulanic acid. The xylose was extracted from spent lemongrass by using 0.25% dilute nitric acid and further partial purification of acid spent hydrolysate was performed using ion exchange resin.

Microbial production of nutraceuticals: Metabolic engineering interventions in phenolic compounds, poly unsaturated fatty acids and carotenoids synthesis.

Nutraceuticals have attained substantial attention due to their health-boosting or disease-prevention characteristics. Growing awareness about the potential of nutraceuticals for the prevention and management of diseases affecting human has led to an increase in the market value of nutraceuticals in several billion dollars. Nevertheless, limitations in supply and isolation complications from plants, animals or fungi, limit the large-scale production of nutraceuticals.

Bacillinaphthin A: A New Naphthohydroquinone from the Endophyte Bacillus subtilis NPROOT3.

The present study explores the endophyte associated with the halophyte Salicornia brachiata for uncovering new biologically important compounds. Thus, HPLC-PDA guided chemical investigation of the ethyl acetate extract of the Bacillus subtilis NPROOT3 led to the isolation of a new compound named bacillinaphthin A (1) along with previously known rubinaphthin A (2). The structure of 2 was determined by a comparison of HR-ESI-MS, H and C nuclear magnetic resonances (NMR) with those of reported data, whereas the structure of new compound 1 was elucidated by interpretation of 1D- and 2D-NMR and MS data.

Regio and Stereoselective One-Pot Synthesis of 2-Deoxy-3-thio Pyranoses and Their -Glycosides from Glycals.

A reaction of glycals with two different types of nucleophiles in the presence of SnCl enabled one-pot rapid access to 2-deoxy-3-thio pyranoses and their -glycosides. The process involves thioaryl substitution at C-3 with stereoretention and α-selective -glycosylation at C-1 from d-glycals, thus combining two reactions with three interventions. The present methodology features an attractive three-component coupling (1:1.

Piperidine Nucleus as a Promising Scaffold for Alzheimer's Disease: Current Landscape and Future Perspective.

Heterocycles and their derivatives hold an important place in medicinal chemistry due to their vast therapeutic and pharmacological significance and wider implications in drug design and development. Piperidine is a nitrogen-containing heterocyclic moiety that exhibits an array of pharmacological properties. This review discusses the potential of piperidine derivatives against the neurodegenerative disease Alzheimer's.

Iodocycloisomerization/Nucleophile Addition Cascade Transformations of 1,2-Alkynediones.

A general electrophilic iodocyclization/nucleophile addition cascade transformation for 1,2-alkynediones for the synthesis of various oxygen heterocycles and access to regioselective alkyne hydroxylation is reported. Furan-tethered ynediones resulted in the construction of -enol ethers via carbonyl-alkyne cyclization-initiated heteroarene dearomatization, whereas other (hetero)arene-, alkenyl-, and alkyl-tethered ynediones resulted in the formation of highly functionalized 3(2)-furanones. Importantly, the developed domino protocols involve the construction of important heterocyclic scaffolds and installation of two functional groups in a single operation.

TFA-mediated stereoselective aza-Michael addition for the synthesis of 3β-arylamine derivatives of withaferin A and evaluation of their anticancer potential.

A simple and efficient protocol for the aza-Michael addition of various aromatic anilines to ring A of withaferin A has been developed. Stereoselectivity, functional group tolerance, broad substrate scope, short reaction time and moderate to high yield are the merits of the protocol. One of the synthesized compounds 11 shows an IC 50 value of 3.

Interactive effect of 24-epibrassinolide and plant growth promoting rhizobacteria inoculation restores photosynthetic attributes in Brassica juncea L. under chlorpyrifos toxicity.

Chlorpyrifos (CP) is a commonly used organophosphorous pesticide that is frequently utilised in the agricultural industry because of its great efficiency and inexpensive cost. The focus of the present study was to assess the impact of CP toxicity on Brassica juncea L. and to unravel the ameliorative potential of phytohormone, 24-epibrassinolide (EBL) mediated plant-microbe (Pseudomonas aeruginosa (B1), Burkholderia gladioli (B2)) interaction in B.