A5037820765- Chemical Synthesis and Reactions
- Microwave-Assisted Synthesis and Applications
- Synthesis of heterocyclic compounds
- Multicomponent Synthesis of Heterocycles
- Inorganic and Organometallic Chemistry
- Oxidative Organic Chemistry Reactions
- Sulfur-Based Synthesis Techniques
- Vanadium and Halogenation Chemistry
- Chemical Reaction Mechanisms
- Synthesis and biological activity
- Nanomaterials for catalytic reactions
- Synthesis and Characterization of Heterocyclic Compounds
- Chemical Synthesis and Analysis
- Organic and Inorganic Chemical Reactions
- Phenothiazines and Benzothiazines Synthesis and Activities
- Synthesis of Organic Compounds
- Electrochemical Analysis and Applications
- Analytical Chemistry and Chromatography
- Synthesis of Tetrazole Derivatives
- Synthesis of Indole Derivatives
- Asymmetric Hydrogenation and Catalysis
- Thermal and Kinetic Analysis
- Synthesis and Biological Evaluation
- Synthesis and Reactions of Organic Compounds
- Metal complexes synthesis and properties
Osmania University
2013-2022
Nirma (India)
2022
Rajiv Gandhi University of Knowledge Technologies
2019-2021
Chaitanya Bharathi Institute of Technology
2011
Indian Institute of Science Bangalore
2001
Nizam's Institute of Medical Sciences
1988
Abstract Cadmium chloride (CdCl2) has been found to be an efficient catalyst for a neat [2 + 3]-cycloaddition of NaN3 with nitriles afford 5-substituted 1H-tetrazoles in good yields. The shorter reaction times, greater yields the product, and easy workup are advantages this methodology.
In this article, we describe more than 100-μm-deep reactive ion etching (RIE) of silicon carbide (SiC) in oxygen-added sulfur hexafluoride (SF6) plasma. We used a homemade magnetically enhanced, inductively coupled plasma etcher (ME-ICP-RIE) and electroplated nickel masks. First, 5 h experiments using gases with 0%, 5%, 10% 20% oxygen were performed by supplying rf power 150 130 W to an ICP antenna sample stage, respectively. They demonstrated maximum etch rate 0.45 μm/min residue-free the...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMethylene Blue - Ascorbic Acid: An Undergraduate Experiment in KineticsT. Snehalatha , K. C. Rajanna and P. Saiprakash View Author Information Department of Chemistry, Osmania University, Hyderabad 500 007, IndiaCite this: J. Chem. Educ. 1997, 74, 2, 228Publication Date (Web):February 1, 1997Publication History Received3 August 2009Published online1 February 1997Published inissue 1...
Abstract Sb2O3 was found to be effective as a catalyst for smooth (2 + 3) cycloaddition of sodium azide with nitriles afford 5-substituted 1H-tetrazoles in good yields.
Aromatic compounds were efficiently nitrated under mild conditions employing ammonium nickel sulphate and nitric acid as a reagent. This procedure works at room temperature yielding mononitro derivative in fair to good yield with high regioselectivity.
ABSTRACT Ultrasonically irradiated Vilsmeier Haack (VH) reaction with acetanilides, hydrocarbons and acetophenones exhibited dramatic rate enhancements excellent yields. The VH acetanilides afforded 2-chloro-3-formyl quinoline derivatives, underwent formylation while hydroxy yielded 3-formyl chromones.
Abstract Aromatic compounds were efficiently nitrated under facile reaction conditions by employing 69% nitric acid catalyzed transition-metal complexes such as [Co(NH3)5Cl]Cl2, [Cu(NH3)4]SO4, Mn(acac)3, [Ni(NH3)6]Cl2, [Ni(en)3]S2O3, and Hg[Co(SCN)4]. The was completed smoothly at room temperature afforded corresponding mono-nitro derivatives in quantitative yield. This new method offers efficient regioselective mononitration of aromatic compounds. Keywords: nitrationnitric...
Abstract Aromatic compounds were efficiently nitrated under mild reaction conditions by employing HNO3 in the presence of anionic (sodium dodecyl sulfate, SDS), cationic (cetyl trimethyl ammonium bromide, CTAB), and nonionic (Triton-X 100) micelles. The rapidly afforded corresponding mononitro derivatives fair to good yields with high regioselectivity. This new method offers an environmentally safe condition minimize waste products.
Silica-supported perchloric acid and bisulfate (SiO2/HClO4 SiO2/KHSO4) have been developed as reusable green catalysts for nitration of aromatic compounds using NaNO2 in acetonitrile medium under conventional solvent-free microwave conditions. The reaction times irradiation are significantly shorter than method even though the yields obtained microwave-assisted reactions comparable with those reflux
Highly efficient thiocyanation of aromatic and heteroaromatic compounds has been accomplished by using cyanuric chloride (NCCl)<sub>3</sub>/NH<sub>4</sub>SCN in dichloromethane under conventional ultrasonic-assisted conditions. Sonicated reactions reached completion with reduced reaction times. The protocol involves a simple workup.
Abstract Bromination of aromatic hydrocarbons is triggered by Vilsmeier–Haack reagent [N,N-dimethyl formamide (DMF–POCl3 system)] in the presence KBr or N-bromosuccinimide (NBS) under solvent-free conditions grinding reactants a mortar with pestle. The reactions afforded corresponding bromo derivatives very good yield high regioselectivity. results are comparable those obtained reflux conditions.
Abstract Tertiary butyl nitrite (TBN) is an acid-free and safe nitrating agent that provides preferentially β-nitrostyrenes with cinnamic acids corresponding nitro derivatives phenols in good yields under classical conditions. However, ultrasonic microwave-assisted reactions reduced the reaction times substantially enhanced from to excellent. Supplemental materials are available for this article. Go publisher's online edition of Synthetic Communications® view free supplemental file.
The approach outlined in this paper is particularly appropriate for the conversion of unsaturated cinnamic acids into nitrostyrenes.
Abstract Ammonium molybdate [Mo(VI)] is operationally simple, environmentally safe and inexpensive reagent. Regioselective nitration of anilides, non-activated moderately activated aromatic compounds could be afforded by employing ammonium nitric acid as mild effective nitrating agent. This procedure works efficiently under reflux conditions to prepare mononitroderivatives in good excellent yield with high regioselectivity.
A Novel Hunsdiecker‐Borodin reaction (HBR) has been carried out efficiently with α,β‐unsaturated aliphatic and aromatic carboxylic acids by using N‐halo succinimides such as N‐chloro succinimide (NCS), N‐bromo (NBS), N‐iodo (NIS) under micellar media. The afforded β‐halo styrenes in excellent yield while underwent decarboxylation to give corresponding halo derivatives. reactions are dramatically accelerated This procedure works CTAB (cetyl trimethyl ammonium bromide), SDS (sodium dodecyl...
Nitration of aromatic Compounds is triggered by Vilsmeier-Haack reagent (DMF/POCl3) or (DMF/SOCl2) in the presence KNO3 NaNO2 under conventional and non-conventional conditions. The reactions af- forded corresponding Nitro derivatives very good yield with high regioselectivity. results obtained methods (Micro wave irradiation, Grinding, Sonication) are comparable those ob- tained conditions, but reaction times former conditions substantially shorter than that latter.
Kinetics of oxidation xanthine alkaloids, such as Xanthine (XAN), hypoxanthine (HXAN), caffeine (CAF), theophylline (TPL), and theobromine (TBR), have been studied with ceric ammonium nitrate (CAN) using poly ethylene glycols (PEG) catalysts. Reaction obeyed first order kinetics in both [CAN] [Xanthine alkaloid]. Highly sluggish CAN-xanthine alkaloid reactions (in acetonitrile media even at elevated temperatures) are enhanced presence PEGs (PEG-200, -300, -400, -600). An increase [PEG]...
Nitration of aromatic compounds and cinnamic acids with oxalylchloride/DMF afforded the corresponding nitro derivatives in presence KNO3 or NaNO2 under conventional nonconventional (ultrasonic microwave) conditions. The present methodology offers several benefits such as excellent yields, simple work-up procedure, short reaction times. yields obtained are comparable those from (POCl3/DMF/KNO3 NaNO2) (SOCl2/DMF/KNO3 systems followed by shorter times sonication microwave conditions very than