Green MCR-Based Synthesis, In Vitro COX Inhibition, and Molecular Docking Studies of Novel Triazolo–Thiadiazine–Oxepine Hybrids Mehul Ramoliya, Kevalsinh Rathod, Kartik Ladva, Mahesh Savant Chemistryselect, 2026 A novel series of 2‐((6‐(p‐substituted phenyl)‐7 H ‐[1,2,4]triazolo[3,4‐ b ][1,3,4]thiadiazin‐3‐yl)methyl)dibenzo[ b,e ]oxepin‐11(6 H )‐one derivatives ( 6a–6j ) was synthesized via conventional multi‐step and in situ one‐pot strategies as potential anti‐inflammatory agents. The synthetic procedure was optimized to enhance yield and purity while incorporating green chemistry principles through reduced solvent usage. Structural elucidation was confirmed by IR, 1 H NMR, 13 C NMR, and APT NMR spectral analyses. The synthesized compounds were evaluated for in vitro cyclooxygenase‐1 (COX‐1) inhibitory activity, exhibiting IC 50 values in the range of 9.10–31.47 mM. Among them, compound 6j (unsubstituted phenyl, H) showed the most potent inhibition with an IC 50 value of 9.10 mM. Molecular docking studies further supported these findings, revealing that 6j possessed the highest binding affinity (−11 kJ/mol) and formed two hydrogen bonds with GLN B:289 and THR B:212 within the COX‐1 active site. Compounds bearing small alkyl substituents, such as 6f (4─CH 3 ) and 6g (4─C 2 H 5 ), also demonstrated significant activity, whereas halogenated and highly polar derivatives exhibited weaker inhibition. Comparative analysis with standard drugs indicated promising COX‐1 inhibitory potential for selected derivatives.
Sodium stearate-mediated heck and heck cassar sonogashira reactions: aqueous micellar catalysis at room temperature Kinjal Markana, Archana Cholera, Sunil Gadakh, Tushar Patel, Neha Baku, K.D. Ladva Tetrahedron Letters, 2025 This study presents a novel and efficient protocol for Heck and Heck Cassar Sonogashira cross-coupling reactions, employing sodium stearate surfactant (SSS) as a micellar catalyst in aqueous media. Sodium stearate, a readily available and cost-effective soap-based surfactant, demonstrates superior catalytic performance compared to conventional surfactants such as TPGS-750M and traditional heating methods. The proposed methodology offers several distinct advantages, including reduced manufacturing costs, improved isolated yields, enhanced scalability, minimized waste generation, and increased chemical recyclability. These factors collectively make this approach both economically and environmentally sustainable. Sodium stearate efficiently facilitates high reaction conversions, leading to excellent yields of the desired coupling products under mild aqueous conditions. This protocol proves particularly valuable for the syn thesis of essential drug molecules, including Kedarcidin chromophore, 5-fluorouracil, Dynemicin-A, Pyr rhoxanthin, and Phorbazole-A. The development of this alternative address’s critical challenges in pharmaceutical research and industrial applications by enabling the efficient production of key pharmacophores. General schematic presentation of Heck and Heck cassar sonogashira reaction • Green Solvent Alternative: Sodium stearate, a biodegradable soap, acts as a surfactant-based medium replacing toxic organic solvents that offers a sustainable and eco-friendly reaction environment. • Micellar Catalysis : aqueous micellar systems that Enhances substrate solubility and improves reaction kinetics. • Room Temperature / Mild Conditions : reactions proceed efficiently under ambient or mild conditions, reducing energy consumption. • Improved Yields & Selectivity : High yields and selectivity observed for both Heck and Sonogashira couplings. Compatible with a wide range of aryl halides and alkynes/olefins. • Palladium Catalysis in Water : Efficient use of Pd-based catalysts in water-rich systems with sodium stearate that Reduces reliance on organic ligands and hazardous additives. • Cost-Effective : Sodium stearate is inexpensive, non-toxic, and widely available, making it ideal for sustainable synthesis.
[1,2,4]Triazolo[3,4-b][1,3,4]Thiadiazin-3-Yl)methyl)pyrimidin-4(3H)-One Derivatives as New Therapeutic Candidates as COX-II Inhibitors: Green Synthetic Approach and In Silico Studies Kevalsinh B. Rathod, Mehul N. Ramoliya, Kartik D. Ladva, Mahesh M. Savant Journal of Heterocyclic Chemistry, 2025 This study presented a systematic synthesis of [1,2,4]triazolo[3,4‐b][1,3,4]thiadiazin‐3‐yl)methyl)‐6‐methylpyrimidin‐4(3H)‐one derivative (9a‐j) through three distinct methodologies: a traditional multistep approach, a two‐step solid‐phase synthesis, and a one‐step green synthesis. The green synthesis demonstrated superior atom economy, minimal impurities, and adherence to sustainability principles. The synthesized compounds were evaluated for cyclooxygenase (COX) inhibition, with 9e showing the highest COX‐II selectivity (SI = 17.10), supported by in vitro and in silico analyses. Structure–activity relationships revealed the impact of electron‐withdrawing groups on binding affinity. This work highlighted an efficient, environmentally conscious approach to creating pharmacologically relevant heterocycles.
A Click Synthesis, Molecular Docking and Anticancer Studies of Benzo[d]azepine-1,2,3-triazole Hybrids Against Breast and Lung Cancer Cell-Lines Kevalsinh Rathod, Mehul Ramoliya, Kartik Ladva, Mahesh Savant Chemistryselect, 2025 A novel click chemistry‐mediated adducts as hybrids of triazole with benzo[d]azepine (10a–j) have been synthesized and structurally characterized by various spectroscopic techniques. The structure consists of a discrete type of cluster, 7,8‐dimethoxy‐1,3‐dihydro‐2H‐benzo[d]azepin‐2‐one linked with 1,2,3‐triazole by methylene bridge and amidic linkages. The in vitro antitumor activity of synthesized compounds (10a–j) was evaluated against human breast cancer (MCF‐7) and human lung cancer (A549) cells. Among the series, compounds 10g (4‐NO2) and 10h (3,4‐diF) exhibited the highest potency, demonstrating the lowest IC50 values, compound 10g displayed the strongest activity against A549 cell line, with an IC50 of 43.99 µM, outperforming the standard drug (IC50 = 49.67). Meanwhile, 10h was most effective against MCF‐7 cells, with an IC50 of 49.93 µM compared to the reference drug (IC50 50.21). Molecular docking studies revealed that both 10g and 10h exhibit strong binding affinities, with binding energies of −11.4 kJ/mol and −10.6 kJ/mol, respectively. These compounds form 4–5 hydrogen bonds with key residues such as Lys B: 254 and Thr A: 145, suggesting a strong interaction with the target proteins.
Effect of Laterally Substituted Methoxy Group on the Mesomorphic Behavior of Novel Ester Derivatives N. K. Baku, K. D. Ladva, A. Y. Cholera, J. J. Travadi Russian Journal of Organic Chemistry, 2024 Abstract To understand how molecular structure affects liquid crystal behavior with reference to the lateral methoxy group, a novel homologous series of liquid crystal derivatives was synthesized and analyzed. The homologous series consists of 12 derivatives (C1–C16), of which the first five homologs (C1–C5) are not liquid crystals, while the remaining homologs (C6–C16) are enantiotropically smectogenic liquid crystals without exhibiting the nematic phase. The average thermal stability of the smectic phase is 77.85°C, and the mesophase length ranges from 4 to 17°C. The molecular structures were verified by analytical and spectral data. The liquid crystal properties of the novel series were compared with those of structurally similar known homologous series. The transition temperatures were determined by an optical polarizing microscope equipped with a heating stage.
Synthesis, characterization, and screening for the antimicrobial activity of 2-(3-(2-cyano-2-(p-tolylamino)vinyl)-1H-indol-1-yl)-N-arylacetamide derivatives Nikhil P. Savaniya, Amit D. Khakhariya, Priyanka P. Pankhaniya, Kartik D. Ladva Indian Journal of Chemistry Ijc, 2024 Herein we give an account of research work that focuses on synthesis of some novel α, β-unsaturated compounds. To afford 2-(3-(2-cyano-2-(p-tolylamino)vinyl)-1H-indol-1-yl)-N-arylacetamide derivatives, Knoevenagel condensation of 2-(3-formyl-1H-indol-1-yl)-N-arylacetamides and 2-cyano-N-(4-methylphenyl) acetamide were carried out .2-(3-formyl-1H-indol-1-yl)-N-arylacetamides were easily derived by employing indole-3-carbaldehyde with 2-chloro-N-arylacetamides. All the synthesized compounds were characterized using analytical techniques such as mass spectrometry, Fourier transform infrared (FT-IR) spectroscopy, and nuclear magnetic resonance (NMR) spectroscopy. The biological activity of all the synthesized compounds were evaluated against series of bacterial and fungal strains (Bacillus subtilis, Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli Rhizopus oryzae, and Aspergillus parasiticus). Among the synthesized compounds 5e, 5g and 5h demonstrates excellent to moderate antibacterial activity when compared to standard drugs such as ampicillin and streptomycin. Whereas 5e exhibits antifungal property as compared to standard drug nystatin.
Synthesis and Characterization of Thieno[2,3-d]pyrimidin-4-ol Tethered with 1,2,3-Triazole Derivatives and Their Antimicrobial Activity Amit D. Khakhariya, Nikhil P. Savaniya, Kartik D. Ladva Asian Journal of Chemistry, 2024 In effort to develop biologically active compounds, novel heterocyclic compounds of thieno[2,3-d]pyrimidine tethered with 1,4-disubstituted-1,2,3-triazoles through methylene-oxy group were synthesized and characterized. The synthesized technique possesses a number of standout characteristics, including few reaction steps, high yield, simple reaction conditions and no need for any further purification processes. The in vitro antimicrobial efficacy of the synthesized derivatives was evaluated and several compounds were found to be moderate to excellent inhibition.
Steroid and Fatty Acid Contents from the Leaves of Carica Papaya Vishvraj V. Devmurari, Poojaben P. Patel, Rajeshreeba A. Jadeja, Cameykumari P. Bhadaniya, Priti P. Aghara, Anilkumar S. Patel, Satishkumar D. Tala, Mahesh M. Savant, Kartik D. Ladva, Pankajkumar B. Nariya Folia Medica, 2021 Aim: To extract and identify the non-polar entities from the leaves of Carica papaya, a plant used for medicinal purpose as folk medicine. Materials and methods: Petroleum ether extract of the Carica papaya leaves was used for this study. Saponification process and methylation process was performed to separate fatty acids and unsaponifiable matters. Phytochemical constituents were separated using chemical process and separated fractions were analyzed by thin layer chromatography (TLC) and gas chromatography coupled with mass spectroscopy (GC-MS). Results: The chemical composition of the steroids, triterpenoids and fatty acid methyl esters (FAMEs) in leaves of Carica papaya, which were analyzed by gas chromatography coupled with mass spectroscopy (GC-MS). A total of 15 fatty acid components were identified in saponifiable matter, from unsaponifiable portion 2 steroids (campesterol, β- or γ-sitosterol), 1 triterpene (squalene), and 1 diterpene (phytol) were identified. Conclusions: The results indicate that the extract is rich in non-polar compounds. In this study, GC-MS method is at the central focus for identification of these phytoconstituents. The current method can be used for direct analysis of non-polar entities of plant material.
Design, synthesis and evaluation of antimicrobial activities of some novel thiazole and thiadiazole derivatives clubbed with 1H-benzimidazole Rasayan Journal of Chemistry, 2016
Design, synthesis and evaluation of antimicrobial activities of some chalcone & schiff base derivatives clubbed with 1H-benzimidazole Der Pharma Chemica, 2016
Synthesis, characterization and antimicrobial evaluation of tetrahydrothiazolo[5,4-c]pyridine derivatives Der Pharma Chemica, 2015
Synthesis, characterization and in-vitro biological evaluation of urea analogue of tetrazolo[1,5-a]pyrimidine Der Pharma Chemica, 2015
Development and validation of a UV spectrophotometric method for the determination of ticagrelor in bulk form Der Pharmacia Lettre, 2014
Synthesis and biological evaluation of thiazolo [3, 2-α] pyrimidine derivatives as a new type of potential antimicrobial agents Rasayan Journal of Chemistry, 2011
Oxadiazoles: Part XV - Synthesis and biological activities of substituted 1,3,4-oxadiazole derivatives Indian Journal of Chemistry Section B Organic and Medicinal Chemistry, 1996
Studies on 4-thiazolidinones. Part-XIV. Preparation and antimicrobial activity of 2,4-bis(2'-aryl-5'-methyl/carboxymethyl-4'-thiazolidinon-3'-yl)-6-hydr oxypyrimidine Journal of the Indian Chemical Society, 1991
