Tesis sobre el tema "Solvent free reaction"
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Chen, Longrui. "Development of Solvent-free Catalyzed Organic Reaction under Mechanochemical Conditions". University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1470044218.
Texto completoMossaraf, Hossain. "Solvent free synthesis of some heterocycles and their applications". Thesis, University of North Bengal, 2017. http://ir.nbu.ac.in/handle/123456789/2621.
Texto completoGrätz, Sven, Doreen Beyer, Valeriya Tkachova, Sarah Hellmann, Reinhard Berger, Xinliang Feng y Lars Borchardt. "The mechanochemical Scholl reaction – a solvent-free and versatile graphitization tool". Royal Society of Chemistry, 2018. https://tud.qucosa.de/id/qucosa%3A70655.
Texto completoAono, Shinji. "Theoretical Study of Electrostatic Solvent Effects within Free Energy Expression and Application to Solvated Reaction". 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/126827.
Texto completoBotti, Luca. "Mechanochemical solvent-free synthesis of Sn-β Zeolite and Ag2O/TiO2 catalysts". Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11941/.
Texto completoLiu, Pengyuan. "Development of Ambient Mass Spectrometry for Protein/Peptide Characterization, Solvent-Free Analysis, and Electrochemical Reaction Monitoring". Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1419335862.
Texto completoMachover, Sarah B. "Understanding the Solvent-free Nucleophilic Substitution Reaction Performed in the High Speed Ball Mill (HSBM): Reactions of Secondary Alkyl Halides and Alkali Metal-Halogen Salts". University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1307043848.
Texto completoStrompen, Simon [Verfasser] y Andreas [Akademischer Betreuer] Liese. "Process development of a solvent-free, chemoenzymatic reaction sequence for the enantioselective synthesis of beta-amino acid esters / Simon Strompen. Betreuer: Andreas Liese". Hamburg-Harburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2012. http://d-nb.info/1048542920/34.
Texto completoMukherjee, P. "Solvent-free, triphase catalytic oxidation reactions over TS-1/H2O2 system". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2000. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2277.
Texto completoHopgood, Heather M. "Substitution Reactions in the High Speed Ball Mill". University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1479816113315302.
Texto completoGrilly, Joshua David. "Switchable Solvents for Novel Chemical Processing". Thesis, Georgia Institute of Technology, 2005. http://hdl.handle.net/1853/7461.
Texto completoVenturini, Chiara. "On-surface coupling reactions on calcium carbonate". Thesis, Toulouse 3, 2015. http://www.theses.fr/2015TOU30158/document.
Texto completoCovalent coupling on metallic surfaces in UHV (Ultra High Vacuum) conditions is a new method for preparing molecular structures otherwise impossible to achieve in solution (graphene nanoribbons, 2D polymers for instance). The major challenge is now to extend these reactions from metallic to insulating surfaces, for future applications as, for instance, in molecular electronics. In particular, the coupling reaction of benzoic acid derivatives, grafted on calcite via carboxylic groups, has been demonstrated for the first time in UHV conditions. In the first part of this work, we synthesized precursor molecules for specific reactions (homocoupling of ethynes, photopolymerization, polycondensation and Ullmann reaction) on calcium carbonate in UHV conditions. In the second part of this work we extended this investigation up to the macroscale level (semi-preparative) by grafting molecules on calcium carbonate microparticles, followed by reaction activation and finally by dissolution of the substrate in order to recover the coupling products. The calcium carbonate microparticles were prepared by grinding commercial product or by spray pyrolysis and were fully characterized by FTIR, TG/DTG, XRD, SEM and BET techniques. Then, after grafting of organic reactant, the reactions were activated with two different solvent-free methods: by grinding in a planetary milling machine or by heating the samples in a furnace under vacuum. Whereas in UHV conditions, 4-iodobenzoic acid affords biphenyldicarboxylic acid, mechanochemical condition gives benzoic acid and thermal activation the dibenzoic acid ether
Ye, Fei. "Ru- and Rh-catalyzed [2+2+2] cycloadditions : an access to fluorenone, 2-aminopyridine, and 1,3-dihydroisobenzofuran derivatives". Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066347/document.
Texto completoThis manuscript focused on the development of eco-friendly and mild processes to access original carbocyclic and heterocyclic scaffolds of biological interest through transition-metal-catalyzed [2+2+2] cycloaddition reactions. Initially, an efficient and practical route for the preparation of highly substituted fluorenones and analogues via solventless RuCl3·nH2O-mediated [2+2+2] cycloaddition of benzoyl bridged [alpha, omega]-diynes and alkynes was developed. Secondly, various functionalized 2-aminopyridine derivatives were synthesized using both neutral RuCl3·nH2O and cationic Cp*Ru(CH3CN)3PF6 complexes to catalyze the [2+2+2] cycloaddition of diynes and cyanamides under solvent-free conditions. With Cp*Ru(CH3CN)3PF6 as catalyst, excellent regioselectivities were achieved to provide a wide range of 2-aminopyridines of high synthetic utility involving halopyridines, vinyl pyridines and amino-aza-fluorenones. Finally, the enantioselective rhodium-catalyzed [2+2+2] cycloaddition of prochiral triynes and monoalkynes was carried out in the presence of cationic [Rh(cod)2]BF4/(R)-BINAP complex to provide enantioenriched 1,3-dihydroisobenzofuran derivatives containing a quaternary carbon stereogenic center
Krol, Michael Joseph Jr. "The Solvent-Free Synthesis of and N-Methyl-N-Alkylpiperidinium Salts and Their Anion Exchange Reactions with Dilithium Phthalocyanine". Wright State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=wright1366905299.
Texto completoStaleva, Plamena Krasimirova Verfasser], Carsten [Akademischer Betreuer] [Bolm y Markus [Akademischer Betreuer] Albrecht. "Solvent-free multicomponent reactions and asymmetric transformations in solution and under mechanochemical conditions / Plamena Krasimirova Staleva ; Carsten Bolm, Markus Albrecht". Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/1221373196/34.
Texto completoStaleva, Plamena Krasimirova [Verfasser], Carsten [Akademischer Betreuer] Bolm y Markus [Akademischer Betreuer] Albrecht. "Solvent-free multicomponent reactions and asymmetric transformations in solution and under mechanochemical conditions / Plamena Krasimirova Staleva ; Carsten Bolm, Markus Albrecht". Aachen : Universitätsbibliothek der RWTH Aachen, 2020. http://d-nb.info/1221373196/34.
Texto completoPalimkar, S. S. "Novel synthetic methodologies: ionic liquid promoted friedlander heteroannulation and palladium-catalyzed copper/ligand/solvent free carbon-carbon coupling with heterocyclization reactions". Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2007. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2604.
Texto completoMAGALHAES, WELINGTON F. "Influence de parametres physico-chimiques sur les reactions du positonium en solution". Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13218.
Texto completoTorregrosa, García Rubén. "Extracció reactiva de llavors oleaginoses per a la preparació de monoglicèrids". Doctoral thesis, Universitat de Lleida, 2016. http://hdl.handle.net/10803/385622.
Texto completoEn este trabajo se ha desarrollado un método en dos etapas para la obtención de extractos ricos en monoglicéridos a partir de semillas de soja y de sésamo. La primera etapa consta de una hidrólisis y esterificación directa con glicidol y solketal de los triglicéridos de las semillas, catalizada con micelio liofilizado de Rhizopus oryzae en ausencia de solvente. La segunda etapa ha consistido en la desprotección del grupo 1,2-acetonido (solketal), empleando catalizadores ácidos. El rendimiento máximo de obtención de monoglicéridos en el extracto final de reacción ha sido del 81 %, empleando las siguientes condiciones: tiempo de hidrólisis de 24 h y de esterificación de 6 h utilizando solketal, a una temperatura de reacción de 50 °C para la primera etapa y utilizando como solvente una mezcla de acetonitrilo:HCl 1M en proporción 4:1 (v/v), con un tiempo de reacción de 6 h a temperatura ambiente para la segunda etapa.
In this work, a two-step method has been developed to prepare monoglyceride enriched extracts from soybean and sesame seeds. In the first step, direct extraction, hydrolysis and esterification of triglycerides from seeds is performed with glycidol and solketal. Reactions are catalyzed with lyophilized mycelium of Rhizopus oryzae in solvent-free conditions. The second step is the cleavage of solketal ring (1,2-acetonide structure) using acid catalysts. The maximum yield of monoglycerides in the two-step reaction process is 81 % using the following conditions: reaction time of 24 h for hydrolysis and 6 h for esterification using solketal, at a temperature of 50 °C in the first step and using a solvent mixture of acetonitrile:1 M HCl in 4:1 (v/v) with a reaction time of 6 h at room temperature in the second step.
Kong, Yao-Zhang y 孔堯璋. "Using Free Radical SH2 Reaction to Study the Free Radical Addition Cyclization Reactions by Substituent Effect, Solvent Effect and Stereochemistry". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/85018809222472425275.
Texto completo義守大學
生物技術與化學工程研究所碩士班
99
In recent years, using the free radicals in organic synthesis becomes more important, especially the regioselectivity and stereoselectivity of the free radical cyclization reactions are highly regarded. The free radical addition cyclization reactions of t-butyl radical with asymmetric dienes, (E)-4-bromobut-2-enyl acrylate) and (N-benzyl-N-(2-(chloro methyl)allyl)acrylamide) , have been studied. The regioselectivity and stereoselectivity of the free radical addition cyclization were studies by the substituent effect which includes the polar effect and the steric effect. The structure and stereochemistry of the addition cyclization products were established and identified. The regioselectivity and stereoselectivity of the free radical addition cyclization were also studies by the solvent effect. The solvents include dimethyl sulfoxide, acetonitrile, tetrahydrofuran, and benzene.
Wang, Yi-Fu y 王義富. "Three-component Reaction : Efficient and Facile Method for the One-pot Synthesis ofα-Aminophosphonates using new Catalyst under Solvent-free Condition". Thesis, 2006. http://ndltd.ncl.edu.tw/handle/84580174679716917946.
Texto completo國立臺灣師範大學
化學系
94
α-Amino phosphonates can be synthesized by using carbonyl compounds (aldehyde or ketone)、aniline ,and triethylphosphite in the presence of the proper catalysts(Iodine,Trichloro-1,3,5-Triazine,Ceric Ammonium Nitrate,or Iron Chloride) under solvent-free condition at room temperature. The methodology can afford high yields of products and short reaction time compared to tranditional methods.
"Tin (II) compounds as novel catalysts for the Kabachnik-Fields reaction: Studies in the synthesis of alpha-aminophosphonates under solvent free conditions and Synthesis of phosphonates and phosphates as reversible and irreversible inhibitors of butyrylcholinesterase". CALIFORNIA STATE UNIVERSITY, LONG BEACH, 2010. http://pqdtopen.proquest.com/#viewpdf?dispub=1472277.
Texto completoBudhai, Asheena. "Migration and decarbonylation reactions of group 6 organometallic complexes using solvent-free procedures". Thesis, 2008. http://hdl.handle.net/10539/5389.
Texto completojiangjialong y 江佳隆. "Cycloaddition Reactions of Allylic Alcohols and Nitrile Oxides Under Solvent-Free Conditions". Thesis, 2000. http://ndltd.ncl.edu.tw/handle/98973277787234160994.
Texto completo國立中興大學
化學系
88
Isoxazoline, prepared by 1,3-dipolar cycloaddition reaction of nitrile oxide and olefin, is an important intermediate in organic synthesis. In this thesis we report our studies on the 1,3-dipolar cycloaddition reaction of benzohydroximoyl chloride and eleven different allylic alcohols under solvent-free conditions. The reaction was carried out either using focused-microwave irradiation for 20 minutes or by conventional heating for 1 h. NaHCO3 was used as the base and Aliquat 336 was used as the phase transfer catalyst. The yields were higher than those obtained previously when benzene was used as the solvent and triethylamine was used as the base. An environmentally more friendly, and more convenient process has been established for the preparation of isoxazoline.
Cao, Q., Deborah E. Crawford, C. Shi y S. L. James. "Greener dye synthesis: continuous, solvent-free synthesis of commodity perylene diimides by twin-screw extrusion". 2019. http://hdl.handle.net/10454/17622.
Texto completoA continuous, scalable, and solvent‐free method for the synthesis of various naphthalic imides and perylene diimides (PDIs) using twin‐screw extrusion (TSE) is reported. Using TSE, naphthalic imides were obtained quantitatively without the need for excess amine reactant or product purification. With good functional‐group tolerance, alkyl and benzyl amine derived PDIs (incl. commercial dyes) were obtained in 50–99 % yield. Use of K2CO3, enabled synthesis of more difficult aniline‐derived PDIs. Furthermore, an automated continuous TSE process for Pigments Black 31 and 32 is demonstrated, with a throughput rate of about 1500 g day−1, corresponding to a space time yield of about 30×103 kg m−3 day−1, which is 1–2 orders of magnitude greater than for solvent‐based batch methods. These methods provide substantial waste reductions and improved efficiency compared to conventional solvent‐based methods.
Engineering and Physical Sciences Research Council. Grant Numbers: EP/L019655/1, IAA1718-04-1117
Tseng, Chao-Ming y 曾昭明. "The Role of Solvents in Oxidative Free Radical Reaction Initiated by Manganese（Ⅲ）Acetate Between 1,4-Quinone and Carbonyl Compounds". Thesis, 2004. http://ndltd.ncl.edu.tw/handle/8nn9c9.
Texto completo國立成功大學
化學系碩博士班
92
During the past 30 years, initiated cyclization by free-radical plays an important role for synthesis of cyclic compounds.There are two methods to produce free radical. First is reduction free-radical reaction, the other is oxidative free-radical reaction. The metals used in these reactions are also different. Commercially available Mn(OAc)3•2H2O has been used for the majority of oxidative cyclizations. In this report, we chose Mn（Ⅲ）as oxidant in our oxidative free-radical reaction. There are two parts in this report. First one is solvent effect in oxidative free-radical reaction initiated by Mn（Ⅲ）between 2-amino-1,4-naphthoquinone and 1,3-dicarbonyl compounds（eq.1, eq.2, eq.3, eq.4）. The other is solvent effect in oxidative free-radical reaction initiated by Mn （ Ⅲ ） between 2-amino-1,4-naphthoquinone and carbonyl compounds（eq.5,eq.6, eq.7）.
Chang, Jen-Ching y 張瑞呈. "The Role of Solvents in Oxidative Free Radical Reaction Initiated by Manganese（Ⅲ）Acetate Between 1,4-Benzoquinone and Carbonyl Compounds". Thesis, 2005. http://ndltd.ncl.edu.tw/handle/76137219915922957379.
Texto completo國立成功大學
化學系碩博士班
93
During the past 30 years, initiated cyclization by free-radical plays an important role for synthesis of cyclic compounds. There are two methods to produce free radical. First is reduction free-radical reaction, the other is oxidative free-radical reaction. The metals used in these reactions are also different. Commerci-ally available Mn(OAc)3•2H2O has been used for the majority of oxidative cyclizations. In this report, we chose Mn(III)as oxidant in our oxidative free-radical reaction. There are only one part in this report. This is solvent effect in oxidative free-radical reaction initiated by Mn(III) between 2-amino-1,4-benzoquinone and 1,3-dicarbonyl compounds.(eq 1.)