Academic literature on the topic 'Dimethyl Acetal'
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Journal articles on the topic "Dimethyl Acetal"
Graikou, Konstantia, Nektarios Aligiannis, Ioanna B. Chinou, and Catherine Harvala. "Cantleyoside-dimethyl-acetal and Other Iridoid Glucosides from Pterocephalus perennis – Antimicrobial Activities." Zeitschrift für Naturforschung C 57, no. 1-2 (February 1, 2002): 95–99. http://dx.doi.org/10.1515/znc-2002-1-217.
Full textKaiho, Atsushi, Makiko Kogo, Ryo Sakai, Kaori Saito, and Takashi Watanabe. "In situ trapping of enol intermediates with alcohol during acid-catalysed de-polymerisation of lignin in a nonpolar solvent." Green Chemistry 17, no. 5 (2015): 2780–83. http://dx.doi.org/10.1039/c5gc00130g.
Full textKidjemet. "N,N-Dimethylformamide Dimethyl Acetal." Synlett, no. 10 (2002): 1741–42. http://dx.doi.org/10.1055/s-2002-34251.
Full textCollins, DJ, LM Downes, and M. Kyriakou. "Enolic Ortho Esters. III. Preparation of a Keto Acetal by Hydride Reduction of an Enolic Ortho Ester." Australian Journal of Chemistry 42, no. 9 (1989): 1617. http://dx.doi.org/10.1071/ch9891617.
Full textAl-Saleh, Balkis, Nouria Al-Awadi, Halema Al-kandari, Mervat Mohammed Abdel-Khalik, and Mohamed Hilmy Elnagdi. "Studies with 2H pyranones: Synthesis of new 3-substituted-4-hydroxy-2H-pyran-2-ones." Journal of Chemical Research 2000, no. 1 (January 2000): 16–17. http://dx.doi.org/10.3184/030823400103165725.
Full textLamba, Doriano, Cenydd Burden, William Mackie, and Bernard Sheldrick. "The crystal and molecular structure of hexa-O-acetyl-carrabiose dimethyl acetal." Carbohydrate Research 155 (November 1986): 11–17. http://dx.doi.org/10.1016/s0008-6215(00)90129-0.
Full textMishra, Subhajit, Sougata Santra, and Alakananda Hajra. "Ligand-free reusable nano copper oxide-catalyzed synthesis of 3-amino-1,4-diynes." RSC Advances 5, no. 111 (2015): 91326–29. http://dx.doi.org/10.1039/c5ra18350b.
Full textHlavatý, Jaromír, and Miroslav Polášek. "Electrochemical Preparation of Alkynedial Tetramethyl Acetals." Collection of Czechoslovak Chemical Communications 73, no. 1 (2008): 19–23. http://dx.doi.org/10.1135/cccc20080019.
Full textGroß, Hans, and Burkhard Costisella. "Zur Umsetzung von Dimethylformamid-dimethyl-acetal mit Phosphortrichlorid." Zeitschrift für Chemie 10, no. 10 (September 1, 2010): 404–5. http://dx.doi.org/10.1002/zfch.19700101024.
Full textKantlehner, Willi, Erwin Haug, and Christophe Bauer. "Orthoamide und Iminiumsalze, LXXXI [1]. Orthoamid-Derivate der 1,3-Dimethylparabansäure / Orthoamides and Iminium Salts LXXXI [1]. Orthoamide Derivatives of 1,3-Dimethylparabanic Acid." Zeitschrift für Naturforschung B 67, no. 9 (September 1, 2012): 907–12. http://dx.doi.org/10.5560/znb.2012-0123.
Full textDissertations / Theses on the topic "Dimethyl Acetal"
Johannesson, Petra. "Synthesis of Aldehyde-Functionalized Building Blocks and Their Use for the Cyclization of Peptides : Applications to Angiotensin II." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2002. http://publications.uu.se/theses/91-554-5211-6/.
Full textIntharapat, Punyanich. "Thermoplastic natural rubbers based on natural rubber (NR) and ethylene vinyl acetate copolymer (EVA) with natural rubber-graft- poly(dimethyl(methacryloyloxymethyl)phosphonate) (NR-g-PDMMMP) as compatibilizer." Le Mans, 2009. http://cyberdoc.univ-lemans.fr/theses/2009/2009LEMA1005.pdf.
Full textGraft copolymers of natural rubber and poly(dimethyl(acryloyloxymethyl)phosphonate) (NR-g-PDMAMP), natural rubber and poly(dimethyl(methacryloyloxyethyl)phosphonate) (NR-g-PDMMEP), and natural rubber and poly(dimethyl(methacryloyloxymethyl)phosphonate) (NR-g-PDMMMP), were prepared in latex medium via a "grafting from" methodology based on the photopolymerization of vinyl monomers initiated from N,N-diethyldithiocarbamate groups previously bound in side position of the 1,4-polyisoprene chains of natural rubber. Thereafter, compatibilization studies of natural rubber (NR) / ethylene vinyl acetate copolymer (EV A) blends were considered using NR-g-PDMMMP as a blend compatibilizer. The investigations were carried out on two categories of blends : uncured 50/50 and dynamically cured 40/60 NR/EV A blends. Ln the two cases, the influences of NR-g-PDMMMP grafting rates (i. E. , 71, 80, 89, and 95 %) and of loading level in compatibilizer (i. E. , 0, 1,3,5,7,9,12, and 15 wt% compared to NR) on rheological, dynamical, mechanical, morphological, and thermal properties, were studied. The best compatibilization effects were observed with a NR-g-PDMMMP having a grafting rate equal to 80 %, at a loading level of 7 wt% for 50/50 uncured blend and 9 wt% for 40/60 dynamically cured blend. In these conditions, the highest complex viscosity (positive deviation), tensile strength, and elongation at break, as well as the lowest values of tension set and tan d (damping factor), were observed. SEM micrographs of compatibilized blends showed a size decrease of the domains. It was also noted that the thermal stability of NR/EV A blends was improved by incorporating NR-g-PDMMMP
BELLOSTA, DECHAVANNE VERONIQUE. "Contribution a l'etude de la reactivite de derives glucidiques vis-a-vis d'organometalliques : nouvelles syntheses stereospecifiques de c-glycosides." Paris 6, 1987. http://www.theses.fr/1987PA066256.
Full textAlvarez, Gonzalez Eleuterio. "Substitution d'ethers et d'alcools allyliques par differents nucleophiles en presence de complexes de nickel(0) : synthese stereoselective des dienes-1,4 a partir des sulfones dieniques avec le chlorure d'isopropylmagnesium en presence de sels de." Paris 6, 1987. http://www.theses.fr/1987PA066064.
Full textEL, JAZOULI MUSTAPHA. "Formation de liaisons carbone-carbone par l'intermediaire des imidothioesters : applications synthethiques." Caen, 1985. http://www.theses.fr/1985CAEN2016.
Full textHsu, Chia-Pi, and 許嘉璧. "Transition Metals Promoted Addition of Alkynyl Aldehyde and Dimethyl Acetal Protecting Reactions of Aldehyde." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/85757446732804987478.
Full text高雄醫學大學
醫藥暨應用化學研究所碩士班
94
We discussed the reactions of a series of alkynyl aldehydes in this thesis. First of all, to find out the best conditions of reductive reaction for 5-phenylpent-4-yanl compound, we change the species of palladium catalysts and base or add various ligands, which have 3-55% yields; when a series of alkynyl aldehydes which have different alkynyl chain and substitution group was employed in the reaction, 6-55% yields was obtained. To our surprise, we discovered that we can used copper(II) chloride and ammonium chloride as reagents with methanol as solvent for the dimethoxy acetal protection group reaction of 5- phenylpent-4-yanl compound in 88% yields. All the reaction is selective for aldehyde in the presence of ketone.
Yao, Chihtung, and 姚志通. "VLE And Boiling Point Of Binary System Of Methyl Acetate, Dimethyl Carbonate, Phenyl Acetate And Diphenyl Carbonate." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/35492345938724523523.
Full text義守大學
生物技術與化學工程研究所
100
Diphenyl carbonate (diphenyl carbonate, DPC) is an important chemical intermediate, with low toxicity and non-polluting. DPC can undergo a wide range of reactions, such as halogenation, nitration, hydrolysis and aminolysis reactions, to form many organic compounds or synthetic polymers. Recently, it was found that, in polycarbonate production, DPC can be used, instead of phosgene, to react with bisphenol A by melt transesterification to produce polycarbonates. This makes DPC become an economic and environmental potential product worth in industrial applications. Therefore, for the demand of DPC process development, we select three major ingredients in DPC process, methyl acetate, dimethyl carbonate and phenyl acetate, to study the binary vapor-liquid equilibrium system. All VLE experiments in this study have passed the vapor-liquid equilibrium thermodynamic consistency verification. In addition to VLE, the vapor pressure of methyl acetate, dimethyl carbonate and phenyl acetate are measured. Their NRTL parameters for the VLE information are reported as well.
Li, Chin-sheng, and 李進勝. "A general method to synthesize triarylmehtanes by titanium(IV) chloride to promote dimethyl acetals and aromatic compounds." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/24484417015763331332.
Full text國立中正大學
化學所
94
We found that the ring opening of the cyclic carbonate in the presence of nucleophilic arenes and titanium tetrachloride to give the corresponding double Friedel-Crafts reaction product in good yields. In continuation with this result, we also found that the acetals are also useful in this double Friedel-Crafts reaction. In general, the reactivity of aromatic dimethyl acetals is much better than those of aliphatic analogues. The acetal is a much better substrate in comparison with its aldehyde in this reaction. The aromatic dimethyl acetals with electron-withdrawing groups afford the desired products in excellent yields. The aromatic dimethyl acetals with electron-donating substituent, such as methyl group, at the para- or ortho-position of the aromatic ring also afford the desired products in reasonable good yields. Although the meta-methoxy-substituted aromatic dimethyl acetals affords the modest yield of the desired product, there is no reactivity of its para-methoxy analogue in this type of reaction. In comparison with 1,4- and 1,3-dimethoxybenzene, the heteroaromatic compounds are less effective in this type of reaction. Interestingly, the heteroaromatic reagents prefer to react with the aromatic aldehydes in the presence of trifluoroacetic acid to give the desired product in reasonable good yields.
FENG, CHUN-MIN, and 馮俊敏. "Intermolecular Interactions in Aqueous Dimethyl Sulphoxide and Acetic Acid Probed by High-Pressure FTIR." Thesis, 2003. http://ndltd.ncl.edu.tw/handle/41520119166751362661.
Full text國立東華大學
化學系
91
Abstract The infrared spectra of DMSO/D2O and CH3COOD/D2O were measured under various concentrations and pressure. The frequencies of the C-H stretching vibration bands for DMSO/D2O mixtures increase with increasing the mole fraction of D2O, implying the contraction of the C-H bonds. As the pressure was elevated to 1.5 GPa, the C-H vibrations of DMSO/D2O were altered into four bands at ~2927 cm-1, ~2941 cm-1, ~3007 cm-1, and ~3025 cm-1. Further concentration-dependent studies indicated that the spectral features at ~2941 cm-1 and ~3036 cm-1 arise from pressure-induced C-H---O hydrogen bonding between C-H in DMSO and oxygen atom in D2O. Ab initio calculations were performed, while the calculated results are consistent with the interpretations based on the high-pressure infrared experiments. Analogous to DMSO/D2O, the pressure-dependent studies on CH3COOD/D2O mixtures provide the evidence of the C-H---O hydrogen bonding as the pressure was elevated.
TSAI, WAN-CHING, and 蔡宛靜. "A theoretical study of the photoelectron spectra of dimethyl ether, ethyl methyl ether, and acetic acid." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/5wvj58.
Full text國立臺中教育大學
科學教育與應用學系碩士在職專班
105
The photoelectron spectra of dimethyl ether, ethyl methyl ether, and acetic acid were studied by theoretical calculations. The equilibrium geometries and harmonic vibrational frequencies of the three molecules and their cations were computed by using the density functional theory (B3LYP and M06-2X functionals) associated with the aug-cc-pVTZ basis set. The Franck-Condon factors were calculated and the photoelectron spectra of the target molecules were simulated. For dimethyl ether and ethyl methyl ether, their Franck-Condon factors were very small due to drastic geometrical changes, and we computed their photoelectron spectra by using the geometries at the saddle point. The energies of the molecules and cations were also calculated by using the CCSD(T) method associated with the basis sets of aug-cc-pVXZ (X = D, T, Q, 5), which were extrapolated to the complete basis set limit in order to obtain the adiabatic ionization energies. The simulated photoelectron spectra of dimethyl ether, ethyl methyl ether, and acetic acid are in agreement with experiments. The calculated ionization energies are also consistent with experimental values, with deviations of -0.093, -0.003, and -0.007 eV for ethyl methyl ether, dimethyl ether and acetic acid, respectively.
Book chapters on the topic "Dimethyl Acetal"
Bährle-Rapp, Marina. "Dimethyl Hexahydronaphthyl Dihydroxymethyl Acetal." In Springer Lexikon Kosmetik und Körperpflege, 162. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/978-3-540-71095-0_3125.
Full textWinkelmann, Jochen. "Diffusion coefficient of dideuterium oxide into dimethyl-sulfoxide and cesium acetate." In Diffusion in Gases, Liquids and Electrolytes, 3369. Berlin, Heidelberg: Springer Berlin Heidelberg, 2018. http://dx.doi.org/10.1007/978-3-662-54089-3_2729.
Full textWohlfarth, Ch. "Viscosity of the mixture (1) ethyl acetate; (2) triethylene glycol dimethyl ether." In Supplement to IV/18, 2056–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_1214.
Full textWohlfarth, Ch. "Viscosity of the mixture (1) propyl acetate; (2) triethylene glycol dimethyl ether." In Supplement to IV/18, 2384–85. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_1430.
Full textWohlfarth, Ch. "Viscosity of the mixture (1) methyl acetate; (2) triethylene glycol dimethyl ether." In Supplement to IV/18, 1554–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_910.
Full textWohlfarth, Ch. "Viscosity of the mixture (1) ethyl acetate; (2) tetra(ethylene glycol) dimethyl ether." In Supplement to IV/18, 2058–59. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_1215.
Full textWohlfarth, Ch. "Viscosity of the mixture (1) propyl acetate; (2) tetra(ethylene glycol) dimethyl ether." In Supplement to IV/18, 2387–88. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_1432.
Full textWohlfarth, Ch. "Viscosity of the mixture (1) methyl acetate; (2) tetra(ethylene glycol) dimethyl ether." In Supplement to IV/18, 1556–57. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-75486-2_911.
Full textPardasani, R. T., and P. Pardasani. "Magnetic properties of dinuclear chromium(II) complex with acetate and dimethyl hydrazine ligands." In Magnetic Properties of Paramagnetic Compounds, 400. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54228-6_227.
Full textShikada, Tsutomu, Kaoru Fujimoto, and Hiro-o. Tominaga. "Vapor-Phase Carbonylation of Dimethyl Ether and Methyl Acetate with Supported Transition Metal Catalysts." In ACS Symposium Series, 176–88. Washington, DC: American Chemical Society, 1987. http://dx.doi.org/10.1021/bk-1987-0328.ch012.
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