A5062278131- Multicomponent Synthesis of Heterocycles
- Chemical Synthesis and Reactions
- Phytochemicals and Antioxidant Activities
- Synthesis and biological activity
- Chemical Synthesis and Analysis
- Asymmetric Hydrogenation and Catalysis
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Banana Cultivation and Research
- Food Science and Nutritional Studies
- Biodiesel Production and Applications
- Asymmetric Synthesis and Catalysis
- Synthetic Organic Chemistry Methods
- Synthesis of Organic Compounds
- Synthesis of Indole Derivatives
- Organometallic Compounds Synthesis and Characterization
- Natural Antidiabetic Agents Studies
- Heavy Metals in Plants
- Microbial Metabolic Engineering and Bioproduction
- Machine Learning in Materials Science
- Synthesis and Biological Evaluation
- Carbon dioxide utilization in catalysis
- Synthesis and Characterization of Heterocyclic Compounds
- Seed and Plant Biochemistry
- Fermentation and Sensory Analysis
Gauhati University
2015-2024
Mizoram University
2023-2024
Bhupendra Narayan Mandal University
2021
Indian Institute of Technology Guwahati
2014-2019
Jawaharlal Nehru University
2001
University of Manchester
2001
Tokyo Institute of Technology
1992
Indian Institute of Technology Kharagpur
1987-1988
Kyoto University
1987
An organocatalyzed aqueous media domino reaction is developed for the regioselective synthesis of benzo[4,5]imidazo[1,2-<italic>a</italic>]pyrimidines and pyrido[2,3-<italic>d</italic>]pyrimidin-2-amines.
Background: Heterogeneous catalysts are the leading areas of research interest mainly due to facilities recovery and reusability. Water hyacinth (Eichhornia crassipes) is a renewable aquatic plant considered hazard for other useful crops. In search sustainable eco-friendly process, novel heterogeneous catalyst has been prepared from this use in synthesis bis(indolyl)methanes bis(pyrrolyl)methanes. These compounds important building blocks preparation pharmaceutically significant porphyrins...
Abstract A highly effective green technique for the synthesis of bis(indolyl) methanes mediated by ‘Aqueous Extract Dillenia indica’ (AEDI) is developed. The reaction involves a simple procedure at moderate temperature below 60 °C in air within short time 30–60 minutes under conditions free from external promoters, acids, ligands/organic media using our natural water–extracted catalyst, affording to high yield. This protocol offers mild, effective, and economical alternative existing...
5-Alkyl/arylidenebarbituric acids were efficiently synthesized through an FeCl<sub>3</sub>·6H<sub>2</sub>O catalyzed domino reaction of 6-aminouracils, water and aldehydes with serving a dual role as both solvent reactant, under benign conditions.
The study is aimed at the remediation of soil spiked with crude oil (5%) by employing Fenton oxidation, biological treatment and combined Fenton-biological treatment. A concentration 5% was selected on basis contamination levels 0–5% as found in upper Assam fields (India). degradation aliphatic fraction (C14–C28) investigated gas chromatography. oxidation carried out different pH (3 to 8) a laboratory batch reactor maximum oxidative observed 3–5. At 3, single resulted 36 57% 5 10 days...
A total of nine oilseeds with more than 15 wt% oil have been investigated for evaluating them as feedstock biodiesel industries. Fatty acid profiles all the samples determined by GC–MS analysis. The saponification numbers, gross heats combustion oils and those corresponding fatty methyl esters (FAMEs) well cetane indices FAMEs calculated empirically. Iodine values experimentally. These used predicting quality biodiesels. If prepared from these oils, biodiesels are likely to meet major...
<italic>Wendlandia glabrata</italic> and procyanidin A2 isolated thereof are exhibited significant anti-diabetic effect.
Water as both reactant and solvent in a FeCl<sub>3</sub>·6H<sub>2</sub>O catalyzed domino reaction towards 5-monoalkylbarbiturates is described.
Abstract A quick, simple and cost‐effective, micelle catalyzed one‐pot strategy for the synthesis of spiro[indoline‐3, 4′‐pyrano[2, 3‐ c ]pyrazoles] by reacting isatins, malononitrile 3‐methyl‐1 H ‐pyrazol‐5(4 )‐ones in water at room temperature is described. The notable advantages protocol are mild reaction conditions, purification process involving no chromatographic process, reusability catalyst high yields short time which make highly attractive.
A simple and straightforward synthesis of 2,3-dihydroquinazolin-4(1H)-ones is developed by reacting anthranilamide with various aldehydes or ketones under mild reaction conditions, using thiamine hydrochloride as a cost-effective, readily available, green catalyst in water. Simple purification process, high yields within short time, wide substrate scope, operational simplicity, reusability the up to three cycles enrich applicability protocol.
Food beverage consumption is a worldwide age-old practice. It also common run-through habit among the tribes of North Eastern parts India. The food group Jou traditionally fermented rice-based by Bodo community Assam, largest plain tribe. not only consumed Bodos on regular basis but widely used in their socio-cultural activities. Joubidwi (JB, product), Joufinai (JF, preserved product) and Jougwran (JG, distilled) are three varieties Jou. Herewith, it had been reported; concentrations metals...
The rice-based traditional alcoholic beverages prepared by the ethnic communities, viz., Deori, Mising and Ahom communities of Sivasagar district Assam, India are known as Sujen, Apong Xajpani, respectively. concentrations Na, K, Cr, Mn, Fe, Co, Ni, Cu, Zn, Cd Pb in these drinks have been determined with a view to making general public aware average daily intake metals from consumption rice beers. metal contents were estimated using atomic spectrometry after digesting samples nitric acid...
Abstract A novel and general protocol for quick, simple efficient synthesis of spiro[indoline‐3, 4′‐pyrazolo[4′, 3′:5,6]pyrido[2, 3‐ d ]pyrimidines] via one‐pot three component reactions isatins, 5‐aminopyrazoles 6‐aminouracils or 2,6‐diaminopyrimidin‐4‐one in water catalyzed by para ‐toluene sulfonic acid monohydrate ( p ‐TSA.H 2 O) under mild reaction conditions has been described. Use as the solvent system, application cost‐effective solid O organocatalyst, high yield short time,...