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Microwave assisted

In the microwave-assisted or hot-filament-assisted CVD of diamond, methane and hydrogen gases (CH ca 1—5% and 95—99%) are used. In... [Pg.217]

Theoretical and applied aspects of microwave heating, as well as the advantages of its application are discussed for the individual analytical processes and also for the sample preparation procedures. Special attention is paid to the various preconcentration techniques, in part, sorption and extraction. Improvement of microwave-assisted solution preconcentration is shown on the example of separation of noble metals from matrix components by complexing sorbents. Advantages of microwave-assisted extraction and principles of choice of appropriate solvent are considered for the extraction of organic contaminants from solutions and solid samples by alcohols and room-temperature ionic liquids (RTILs). [Pg.245]

The performance of microwave-assisted decomposition of most difficult samples of organic and inorganic natures in combination with the microwave-assisted solution preconcentration is illustrated by sample preparation of carbon-containing matrices followed by atomic spectroscopy determination of noble metals. Microwave-assisted extraction of most dangerous contaminants, in particular, pesticides and polycyclic aromatic hydrocarbons, from soils have been developed and successfully used in combination with polarization fluoroimmunoassay (FPIA) and fluorescence detection. [Pg.245]

MICROWAVE-ASSISTED SOLVENT EXTRACTION AND A NEW METHOD FOR ISOLATION OF TOTAL PETROLEUM HYDROCARBONS (TPH) FROM PLANTS WITH COLUMN CHROMATOGRAPHY (SILICA GEL AND ALUMINA) AND DETERMINATION WITH SPECTROFLUOROPHOTOMETRY... [Pg.270]

COMPARISON OF MICROWAVE ASSISTED EXTRACTION METHODS FOR THE DETERMINATION OF PLATINUM GROUP ELEMENTS IN SOIL SAMPLES BY ELECTROTHERMAL ATOMIC ABSORPTION SPECTROMETRY AFTER PHASE SEPARATION-EXTRACTION... [Pg.290]

The first and rate-determining step involves carbon monoxide dissociation from the initial pentacarbonyl carbene complex A to yield the coordinatively unsaturated tetracarbonyl carbene complex B (Scheme 3). The decarbonyla-tion and consequently the benzannulation reaction may be induced thermally, photochemically [2], sonochemically [3], or even under microwave-assisted conditions [4]. A detailed kinetic study by Dotz et al. proved that the initial reaction step proceeds via a reversible dissociative mechanism [5]. More recently, density functional studies on the preactivation scenario by Sola et al. tried to propose alkyne addition as the first step [6],but it was shown that this... [Pg.125]

Microwave-assisted Diels-Alder reactions have been performed in solvents [38, 39], in free solvent conditions [38c, 40], in solid phase [39, 41] and in the presence of Lewis acids [38c]. Sometimes some of these reaction conditions were combined. [Pg.158]

Table 4.10 Microwave-assisted Diels-Alder reactions supported on graphite... Table 4.10 Microwave-assisted Diels-Alder reactions supported on graphite...
Microwave-assisted Dieis-Aider reactions supported on graphite [39a]... [Pg.196]

Fig. 7 Examples of microwave-assisted reactions and functional group transformations that are covered in Sect. 2... Fig. 7 Examples of microwave-assisted reactions and functional group transformations that are covered in Sect. 2...
Microwave-Assisted Substitution Reactions via Addition Elimination 3.2.1... [Pg.17]

The use of microwave irradiation for this reaction, compared to conventional thermal heating, was investigated. Chloroform used as solvent under the conventional heating did only allow a temperature of 60 °C and a direct comparison between the two methods is therefore somewhat unfair imder these circumstances. Nevertheless, the microwave-assisted method is attractive and proved useful for both primary and secondary amines resulting in highly substituted pyrazolo ring-fused pyridones 40 in 68-86% yields within only 10 min. [Pg.18]

Table 3 Highly substituted 2-pyridones were aminomethylated by utilizing a microwave-assisted Mannich reaction... Table 3 Highly substituted 2-pyridones were aminomethylated by utilizing a microwave-assisted Mannich reaction...
Microwave-Assisted Transition Metal Catalyzed Coupling Reactions... [Pg.21]

Halogen-substituted 2-pyridones are key intermediates for further metal-catalyzed coupling reactions and the halogenation of these scaffolds has already been described in previous sections. In the following section, a variety of C - C and C - N cross-coupling reactions under microwave-assisted conditions are described with some illustrative examples. [Pg.21]

The Suzuki reaction has been successfully used to introduce new C - C bonds into 2-pyridones [75,83,84]. The use of microwave irradiation in transition-metal-catalyzed transformations is reported to decrease reaction times [52]. Still, there is, to our knowledge, only one example where a microwave-assisted Suzuki reaction has been performed on a quinolin-2(lH)-one or any other 2-pyridone containing heterocycle. Glasnov et al. described a Suzuki reaction of 4-chloro-quinolin-2(lff)-one with phenylboronic acid in presence of a palladium-catalyst under microwave irradiation (Scheme 13) [53]. After screening different conditions to improve the conversion and isolated yield of the desired aryl substituted quinolin-2( lff)-one 47, they found that a combination of palladium acetate and triphenylphosphine as catalyst (0.5 mol %), a 3 1 mixture of 1,2-dimethoxyethane (DME) and water as solvent, triethyl-amine as base, and irradiation for 30 min at 150 °C gave the best result. Crucial for the reaction was the temperature and the amount of water in the... [Pg.21]


See other pages where Microwave assisted is mentioned: [Pg.214]    [Pg.216]    [Pg.242]    [Pg.245]    [Pg.158]    [Pg.158]    [Pg.160]    [Pg.162]    [Pg.2]    [Pg.3]    [Pg.11]    [Pg.12]    [Pg.18]    [Pg.18]    [Pg.19]    [Pg.20]   
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1,2-Dihydropyridines synthesis microwave-assisted 1, 2-dihydropyridine

1,3,4-oxadiazoles, microwave-assisted

1,3,4-oxadiazoles, microwave-assisted synthesis

1,3,4-thiadiazoles, microwave-assisted

1,3,4-thiadiazoles, microwave-assisted synthesis

1.3- thiazoles, microwave-assisted

1.3- thiazoles, microwave-assisted synthesis

Acylation microwave assisted

Alkylation, microwave-assisted

Approaches to microwave-assisted organic chemistry

Assisted Microwave Heating

Atmospheric microwave-assisted extractions

Benzimidazoles microwave-assisted synthesis

Biginelli reaction, microwave-assiste

Catalysts microwave-assisted synthesis

Ceramic powders, microwave-assisted

Ceramic powders, microwave-assisted synthesis

Chemical microwave assisted

Chemical reactions microwave-assisted

Chemical vapor deposition microwave plasma assisted

Closed microwave-assisted digestion

Closed-vessel microwave-assisted extraction

Condensations microwave assisted

Conventional heating systems microwave-assisted

Copper microwave-assisted

Copper-catalyzed azide-alkyne cycloaddition microwave-assisted

Coumarins, microwave-assisted

Coumarins, microwave-assisted synthesis

Dehalogenations, microwave-assiste

Deprotection, microwave-assisted

Dielectric microwave-assisted drying

Diels-Alder microwave-assisted

Diels-Alder reactions microwave-assisted

Distillation, microwave-assisted

Double bonds microwave-assisted

Drying microwave assistance

Drying microwave-assisted

Dynamic microwave-assisted

Dynamic microwave-assisted extraction

Energy microwave-assisted drying

Esterification, microwave-assisted

Fast, solid state, microwave-assisted, synthesis

Fluorous synthesis microwave-assisted

Focused microwave-assisted Soxhlet

Focused microwave-assisted Soxhlet extraction

Focused microwave-assisted Soxhlet extraction (FMASE

Focused microwave-assisted Soxhlet extractor

Focused microwave-assisted extraction

Focused microwave-assisted extraction, atmospheric pressur

Focused microwave-assisted solvent

Focused microwave-assisted solvent extraction

Focused open-vessel microwave-assisted extraction

Foods microwave-assisted drying

Freeze microwave-assisted

Friedel microwave-assisted

Friedel-Crafts microwave assisted

Glow discharge microwave assisted

Grafting microwave assisted synthesis

Heck reaction microwave-assisted

Heterocycle synthesis microwave-assisted

Heterocyclic chemistry using microwave-assisted approaches

Hydrothermal microwave-assisted

Intramolecular Diels-Alder reactions microwave-assisted

Ionic conduction, microwave-assisted

Ionic liquids microwave-assisted synthesis

Leaching microwave-assisted

Lipids microwave-assisted extraction

MAOS (microwave-assisted organic

Matrix effects microwave-assisted extraction

Mercury Microwave assisted extraction

Michael microwave assisted

Microwave -assisted fluorescence

Microwave Assisted Reactions in Organic Solvents

Microwave assisted continuous-flow conditions

Microwave assisted oxidations

Microwave assisted procedures

Microwave assisted reactions

Microwave assisted reactions chemical synthesis

Microwave assisted reactions dielectric loss

Microwave assisted reactions dipolar polarization

Microwave assisted synthesis

Microwave assisted two-step process

Microwave assisted zeolite synthesis

Microwave heating vacuum-assisted

Microwave plasma assisted CVD

Microwave plasma assisted chemical vapor

Microwave plasma-assisted

Microwave-Assisted Drying Equipment

Microwave-Assisted Drying of Foods - Equipment, Process and Product Quality

Microwave-Assisted Freeze-Drying Equipment

Microwave-Assisted Functional Group Transformations

Microwave-Assisted Functionalization of 2-Pyridones

Microwave-Assisted Hydrothermal Method (HTMW)

Microwave-Assisted LC Polyester Synthesis

Microwave-Assisted Organic Synthesis (MAOS) - A Brief History

Microwave-Assisted Route Towards Fluorinated Nanomaterials

Microwave-Assisted Substitution Reactions via Addition Elimination

Microwave-Assisted Transition Metal Catalyzed Coupling Reactions

Microwave-and Ultrasound-Assisted Chemistry

Microwave-assisted 1,2-dihydropyridine synthesis

Microwave-assisted Biginelli

Microwave-assisted Biginelli multicomponent reactions

Microwave-assisted Biginelli production

Microwave-assisted Biginelli synthesis

Microwave-assisted Chemistry of Carbohydrates

Microwave-assisted Combinatorial and High-throughput Synthesis

Microwave-assisted Condensation Reactions

Microwave-assisted Extraction of Essential Oils

Microwave-assisted Fischer indolization

Microwave-assisted Gould-Jacobs reaction

Microwave-assisted Heck-type

Microwave-assisted Minisci reaction

Microwave-assisted Organic Reaction

Microwave-assisted Organic Reaction Enhancement

Microwave-assisted Reactions on Graphite

Microwave-assisted Solvent Extraction (MASE)

Microwave-assisted Solventless Condensations

Microwave-assisted Solventless Reactions on Solid Supports

Microwave-assisted Solventless Synthesis of Heterocycles

Microwave-assisted Suzuki-Miyaura

Microwave-assisted Suzuki-Miyaura coupling

Microwave-assisted Synthesis of Heterocyclic Compounds on Solid Supports

Microwave-assisted Synthesis of Transition Metal Oxy-Hydroxy-Fluorides

Microwave-assisted acid hydrolysis

Microwave-assisted chemistry

Microwave-assisted citrate method

Microwave-assisted combinatorial

Microwave-assisted combinatorial synthesis

Microwave-assisted decomposition

Microwave-assisted digestion

Microwave-assisted dissolution

Microwave-assisted distillers

Microwave-assisted domino reactions

Microwave-assisted drying system

Microwave-assisted extraction

Microwave-assisted extraction (MAE

Microwave-assisted extraction Soxhlet

Microwave-assisted extraction advantages

Microwave-assisted extraction characteristics

Microwave-assisted extraction chromatography

Microwave-assisted extraction closed-vessel systems

Microwave-assisted extraction disadvantages

Microwave-assisted extraction examples

Microwave-assisted extraction instrumentation

Microwave-assisted extraction open-vessel systems

Microwave-assisted extraction procedures

Microwave-assisted extraction solid matrices

Microwave-assisted extraction solvents, organic

Microwave-assisted extraction technique

Microwave-assisted flow process

Microwave-assisted flow synthesis

Microwave-assisted furan synthesis

Microwave-assisted hydrodistillation methods

Microwave-assisted hydrogen

Microwave-assisted hydrogen transfer reaction

Microwave-assisted hydrothermal method

Microwave-assisted hydrothermal method crystallization

Microwave-assisted hydrothermal method powders

Microwave-assisted library synthesis

Microwave-assisted methods

Microwave-assisted methods, for

Microwave-assisted micellar extraction

Microwave-assisted mineralization

Microwave-assisted organic synthesis

Microwave-assisted organic synthesis MAOS)

Microwave-assisted organic synthesis batch reactors

Microwave-assisted organic synthesis commercial system

Microwave-assisted organic synthesis domestic ovens

Microwave-assisted organic synthesis green chemistry

Microwave-assisted organic synthesis instrumentation

Microwave-assisted organic synthesis multicomponent reactions

Microwave-assisted organic synthesis multimode reactor

Microwave-assisted organic synthesis optimization

Microwave-assisted organic synthesis principles

Microwave-assisted organic synthesis process research

Microwave-assisted organic synthesis scale

Microwave-assisted organic synthesis single-mode reactors

Microwave-assisted organic synthesis solid-state reactions

Microwave-assisted organic synthesis solvents

Microwave-assisted organic synthesis techniques

Microwave-assisted organic synthesis vessels

Microwave-assisted oxidative

Microwave-assisted oxidative digestion

Microwave-assisted peptide synthesis

Microwave-assisted polymerization

Microwave-assisted polyol method

Microwave-assisted polyol process

Microwave-assisted process

Microwave-assisted processes acylation

Microwave-assisted processes advantage

Microwave-assisted processes digestion

Microwave-assisted processes distillation

Microwave-assisted processes drying

Microwave-assisted processes effects

Microwave-assisted processes leaching

Microwave-assisted processes variables

Microwave-assisted protein hydrolysis

Microwave-assisted pyrrole synthesis

Microwave-assisted reactions Suzuki-Miyaura reaction

Microwave-assisted route

Microwave-assisted sample drying

Microwave-assisted scavenging

Microwave-assisted scavenging reactions

Microwave-assisted solid sampling

Microwave-assisted solid-phase peptide

Microwave-assisted solid-phase peptide synthesis

Microwave-assisted solid-phase synthesis

Microwave-assisted solvent

Microwave-assisted solvent extraction

Microwave-assisted solvent-free conditions

Microwave-assisted solvent-free library

Microwave-assisted solvent-free library synthesis

Microwave-assisted stereoselective

Microwave-assisted synthesis hydroxyfluorides

Microwave-assisted synthesis metal organic frameworks

Microwave-assisted synthesis structural features

Microwave-assisted synthesis, nanolayer

Microwave-assisted synthesis, nanolayer carbides, nitrides

Microwave-assisted synthesis, nanolayer nitrides

Microwave-assisted treatment

Microwave-assisted, solvent-free

Moisture microwave-assisted drying

Monomode reactors, microwave-assisted

Multimode reactors, microwave-assisted

Nanolayer carbides microwave-assisted synthesis

Nitrides, microwave-assisted synthesis

Nucleophilic substitutions microwave-assisted

Open microwave-assisted digestion

Organic microwave-assisted

Organic synthesis, microwave-assiste

Other Microwave-Assisted Methods

Oxidation-reduction reactions microwave-assisted

Oximes microwave-assisted reactions

Petasis microwave assisted

Phenols microwave-assisted extraction

Polyamide synthesis, microwave-assisted

Polyamide synthesis, microwave-assisted polycondensation

Polyimide synthesis, microwave-assisted

Polyimide synthesis, microwave-assisted polycondensation

Pressure microwave-assisted extraction

Process control, microwave-assisted

Process control, microwave-assisted drying

Product microwave-assisted drying

Quinazolines microwave-assisted synthesis

Reaction methods microwave-assisted organic chemistry

Reaction temperature enhancement using microwave-assisted chemistry

Recovery microwave-assisted extraction

Reduction microwave-assisted

Resin microwave-assisted

Robotics microwave-assisted

Salicylaldehydes, microwave-assisted

Salicylaldehydes, microwave-assisted synthesis

Samples microwave, acid-assisted

Scale microwave-assisted synthesis

Scale-up of microwave-assisted organic synthesis

Solvent selection microwave-assisted extraction

Solventless Microwave-assisted Reactions

Solvents loss tangents, microwave-assisted

Solvents microwave-assisted chemistry

Subject microwave assisted

Sublimation microwave-assisted

Suzuki coupling microwave-assisted fluorous phase

Suzuki microwave assisted

Suzuki reaction microwave-assisted

Suzuki reaction microwave-assisted synthesis

Synthesis methodology microwave-assisted chemistry

Temperature effects microwave-assisted extraction

Temperature microwave-assisted drying

Thiohydantoins microwave-assisted synthesis

Timesavings associated with microwave-assisted synthesis a quantitative approach

Transfer microwave-assisted

Vegetable microwave-assisted

Wall effects, microwave-assisted

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