A5044939987- Catalytic Cross-Coupling Reactions
- Organometallic Complex Synthesis and Catalysis
- Catalytic C–H Functionalization Methods
- Asymmetric Hydrogenation and Catalysis
- Synthetic Organic Chemistry Methods
- Cyclopropane Reaction Mechanisms
- Asymmetric Synthesis and Catalysis
- Chemical Synthesis and Analysis
- Metal complexes synthesis and properties
- Coordination Chemistry and Organometallics
- Chemical Synthesis and Reactions
- Molecular Junctions and Nanostructures
- Advanced biosensing and bioanalysis techniques
- Ferrocene Chemistry and Applications
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Sulfur-Based Synthesis Techniques
- Nanomaterials for catalytic reactions
- Crystallography and molecular interactions
- Organoboron and organosilicon chemistry
- Minerals Flotation and Separation Techniques
- Synthesis and characterization of novel inorganic/organometallic compounds
- N-Heterocyclic Carbenes in Organic and Inorganic Chemistry
- Fuel Cells and Related Materials
- Carbon dioxide utilization in catalysis
Association of Schools of Public Health in the European Region
2024
Tampere University
2024
Graduate Institute of International and Development Studies
2023
Anthropological Survey of India
1995-2022
Jawaharlal Nehru University
2016-2020
Indian Association for the Cultivation of Science
2008-2018
University of Nebraska–Lincoln
2004-2014
Burdwan Medical College & Hospital
2007
National Chemical Laboratory
1996-2005
Indian Institute of Chemical Technology
1998-2002
Palladium catalyzed coupling reactions have emerged as a versatile, convenient, selective and mild protocol that can usually be adapted in any synthetic scheme for important target molecules with various degrees of structural complexity.
An efficient Hiyama coupling reaction between benzylic halide and aryltrialkoxysilane using Pd nanoparticles has been developed. This procedure accommodates various functional groups to yield a diverse range of diarylmethanes which are ubiquitous units natural products pharmaceuticals.
The direct formation of graphene on various dielectric surfaces is successful via a single-step rapid thermal processing (RTP) substrates coated with amorphous carbon (C) and nickel (Ni) thin films. High-quality obtained uniformly the whole surface wafers controlled number layers. monolayer exhibits low sheet resistance high optical transmittance in visible range. As service to our authors readers, this journal provides supporting information supplied by authors. Such materials are peer...
Like rest of the world, South Asian region is facing enormous challenges with coronavirus disease 2019 (COVID-19) pandemic. The socioeconomic context eight countries averse to any long-term lockdown program, but still observed stringent close two months. This paper analyzed major measures in public health preparedness and responses those research was based on a situation analysis discuss appropriate plan for epidemic preparedness, strategies prevention control measures, adequate response...
Using an iterative sequence of Wittig olefination, reduction, oxidation, and condensation active methylene group to carbonyl, it was possible prepare a series organometallic push-pull molecules [(CO)(5)M=C(OCH3)(-CH=CH-)(n)(C5H4)Fe(C5H5), M = W, Cr, n 1-4] in which ferrocene is the donor element Fisher carbene moeity acceptor group. The molecular first hyperpolarizability beta determined by hyper-Rayleigh scattering experiments. values ranged from 110 x 10(-30) 2420 esu acetonitrile, they...
An efficient synthesis of Pd nanoparticles in water has been developed using a Fischer carbene complex tungsten as the reductant and PEG capping agent. The colloidal palladium (1 mol %) efficiently catalyzes Hiyama cross-coupling reactions performed air. Excellent yields products were obtained with wide range substrates. Catalytic activity stability found to be inversely correlated.
A novel, air-stable phosphine ligand, prepared from readily available 2-bromonitrobenzene and vinylmagnesium bromide, combines with Pd(CH(3)CN)(2)Cl(2) to afford an effective catalyst for Suzuki-Miyaura cross-coupling of aryl, heteroaryl, allyl chlorides phenylboronic acid.
An efficient catalytic amination of aryl-substituted allylic alcohols has been developed. The complex [(η3-allyl)PdCl]2 modified by a bis phosphine ligand, L, used as catalyst in the reaction that afforded wide range allyl amines good to excellent yield under mild conditions.
Abstract Health Systems Research (HSR) has witnessed significant progress in theory, methodology and practice over the last two decades. The complexity of health systems allowed for diverse lenses HSR. However, given absence dialogue between different streams HSR, diversity this field, perhaps its greatest strength, is turning out to be quite challenge. Without a common language that enables researcher interaction critical examination can easily turn into din. To overcome confusion...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA stereospecific convergent coupling of nucleophilic and electrophilic chiral carbonsDonald S. Matteson, Prana B. Tripathy, Amitabha Sarkar, K. Mathew SadhuCite this: J. Am. Chem. Soc. 1989, 111, 12, 4399–4402Publication Date (Print):June 1, 1989Publication History Published online1 May 2002Published inissue 1 June 1989https://pubs.acs.org/doi/10.1021/ja00194a038https://doi.org/10.1021/ja00194a038research-articleACS PublicationsRequest reuse...
Palladium nanoparticles generated in PEG catalyze the reaction of bis(pinacolato)diboron with various aryl/benzyl halides to afford boronates high yield. Arylboronates thus prepared, have been directly used Suzuki–Miyaura coupling different aryl and benzyl a convenient one-pot, two-step solvent free green synthesis unsymmetrical biaryls diarylmethanes.
Fischer carbene complex anchored on glass or silicon surface using a Cu-free 'click' reaction allows facile and swift covalent grafting of protein molecules like Bovine Serum Albumin (BSA).
A cross-coupling reaction of a variety aryl, heteroaryl, and benzyl chlorides with ArMgX is catalyzed by 2 mol % nickel-phosphine complex prepared in situ from an equimolar amount Ni(CH(3)CN)(2)Cl(2) ligand (L2) to yield products excellent THF at room temperature. This new bidentate stable air forms upon Ni(CH(3)CN)(2)Cl(2). Structures the were confirmed single-crystal X-ray diffraction.
Iron films deposited by direct current magnetron sputtering onto glass substrates were converted into FeS2 thermal sulfurization. Experiments carried out to optimize the sulfurization process, and formation of thin was investigated under different annealing temperatures times. High quality fabricated using this single phase pyrite obtained after in a sulfur nitrogen atmosphere at 450 °C for 1 h. Film crystallinity identification determined x-ray diffraction. The cubic prepared p-type,...
Abstract Nanoparticulate palladium ( Pd np ‐2 ) supported on polyethylene glycol‐functionalized silica gel is an excellent heterogeneous catalytic system for Suzuki, Sonogashira and Stille cross‐coupling reactions that afford products in high yield. The immobilized nanoparticles were readily prepared by reaction of modified 1 with potassium tetrachloropalladate(II) the presence acyl metal salt a Fischer carbene complex. characterized X‐ray diffraction (XRD) transmission electron microscopy...
Analysis techniques are needed to determine the quantity and structure of materials composing an organic layer that is below ultra-thin film limit in a liquid environment. Neither optical nor acoustical can independently distinguish between thickness porosity films due parameter correlation. A combined approach yields sufficient information both porosity. We describe application combinatorial measure single or multiple layers when total small compared wavelength probing light. The...
A Fischer carbene complex was grafted onto self-assembled monolayers (SAMs) on gold or glass by a copper-free "click" reaction. Pendant lysine residues of protein obtained from Staphylococcus aureus rapidly reacted with the electrophilic metal SAM effecting covalent attachment surface. The coated surface further led to bioaffinity immobilization rabbit IgG in an oriented manner, feature that also permits its purification serum. Rabbit could be removed pH adjustment. regenerated reused three...
Abstract Various pyrazole‐based P,N ( 2a – c ) and N,N 3a b ligands have been synthesized. Using representative ligands, Ni II , Co Cu I complexes prepared structurally characterized by crystallography. During complexation of salts, the phosphane part ligand oxidized to oxide. For donor a dimeric chloro‐bridged complex was obtained. 4 is an active catalyst for ethylene oligomerization. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2005)