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Relevant bibliographies by topics / Aromatic Carbamates

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Academic literature on the topic 'Aromatic Carbamates'

Author: Grafiati

Published: 6 September 2023

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Journal articles on the topic "Aromatic Carbamates"

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Tietze, Lutz F., Heiko J. Schuster, J. Marian von Hof, Sonja M. Hampel, Juan F. Colunga, and Michael John. "Atropisomerism of Aromatic Carbamates." Chemistry – A European Journal 16, no. 42 (September 30, 2010): 12678–82. http://dx.doi.org/10.1002/chem.201001047.

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Vincendon, Marc. "Scleroglucan derivatives: Aromatic carbamates." Journal of Polymer Science Part A: Polymer Chemistry 37, no. 16 (August 15, 1999): 3187–92. http://dx.doi.org/10.1002/(sici)1099-0518(19990815)37:16<3187::aid-pola16>3.0.co;2-j.

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3

Wilshire, JFK. "The Phthalimidomethyl Rearrangement." Australian Journal of Chemistry 43, no. 11 (1990): 1817. http://dx.doi.org/10.1071/ch9901817.

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The discovery of a new acid-catalysed monodentate N → C aromatic rearrangement, namely the phthalimidomethyl rearrangement, is reported. In this rearrangement, discovered during the reaction of N-hydroxymethylphthalimide with certain alkyl N-(4-nitrophenyl)carbamates in concentrated sulfuric acid solution, the phthalimidomethyl group migrates from its initial location on the nitrogen atom of the carbamate function to a carbon atom of the nitrophenyl group. Evidence, provided by an appropriate 'crossover' experiment, indicates that the rearrangement is intermolecular. Hindered rotation about the N(carbamoyl)-aryl bond of the N-phthalimidomethyl derivatives of both ethyl and methyl N-(2,4-dinitrophenyl)carbamate is reported.

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Rojas-Buzo, Sergio, Pilar García-García, and Avelino Corma. "Zr-MOF-808@MCM-41 catalyzed phosgene-free synthesis of polyurethane precursors." Catalysis Science & Technology 9, no. 1 (2019): 146–56. http://dx.doi.org/10.1039/c8cy02235f.

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Yamagami, C., T. Sai, and N. Takao. "13C N.M.R. Spectra of ortho-Substituted Phenyl N,N-Dimethyl-Carbamates and N-Methyl Carbamates." Australian Journal of Chemistry 40, no. 12 (1987): 2005. http://dx.doi.org/10.1071/ch9872005.

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We measured 13C nuclear magnetic resonance spectra of O-substituted phenyl N,N- dimethyland N-methyl- carbamates and compared the results with those for the corresponding m- and p-substituted derivatives. The additivity relationship on the basis of the substituent chemical shift for monosubstituted benzenes ( scsphx ) did not hold well because of the ortho effect. However, the scs of C2(ipso), C3(ortho) and C5(para) was correlated excellently with scsphxX . Dual substituent parameter (DSP) analyses of the scs of C5 and the carbonyl carbon in the fixed side chain showed that correlation was very good for C5 but moderate for C=O. These observations suggested that the X substituent lay in almost the same plane as the aromatic ring, whereas the OCONMe2 group may have changed its conformation somewhat. In O-substituted derivatives, the carbon nucleus that is directly attached to the aromatic ring (γ to the oxygen; OCONMe2)had a pronounced upfield shift relative to the corresponding m- and p-substituents by 4-5 ppm . This phenomenon was explained by the γ-effect caused by the oxygen atom.

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Mayer, Szabolcs, Dominika Mária Herr, Nóra Nagy, Viktória Donkó-Tóth, Péter Keglevich, Márton Weber, Miklós Dékány, and László Hazai. "Synthesis and In Vitro Anticancer Evaluation of Chrysin Containing Hybrids and Other Chrysin Derivatives." Periodica Polytechnica Chemical Engineering 67, no. 2 (May 23, 2023): 316–36. http://dx.doi.org/10.3311/ppch.21919.

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Chrysin, a well-known naturally occurring flavonoid having several biological effects including antiproliferative activity, was coupled with different pharmacophore structures. Coupling was carried out with spacers of different lengths and types. Structures selected for hybrid formation were amines, cyclic amino acid esters, and (hetero)aromatic compounds. In addition, vindoline, which is a Vinca alkaloid containing an indole skeleton, was also used. The alkylation of amines in the presence of carbonate base resulted in an interesting carbamate side product formation beside the expected amine. We also present the detailed structure elucidation of the carbamates. The in vitro anticancer activities of the synthesized derivatives were examined against 60 human tumor cell lines in National Cancer Institute (NCI, USA).

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VELIKORODOV, A. V., T. N. MAKSIMOVA, and V. B. MOCHALIN. "ChemInform Abstract: Reaction of Dichlorocarbene with Aromatic Carbamates." ChemInform 25, no. 38 (August 19, 2010): no. http://dx.doi.org/10.1002/chin.199438131.

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Kim, Hee-Kwon, and Tien Tan Bui. "Lanthanum(III) Trifluoromethanesulfonate Catalyzed Direct Synthesis of Ureas from N-Benzyloxycarbonyl-, N-Allyloxycarbonyl-, and N-2,2,2-Trichloroethoxycarbonyl-Protected Amines." Synlett 31, no. 10 (March 6, 2020): 997–1002. http://dx.doi.org/10.1055/s-0040-1707991.

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A novel lanthanum triflate mediated conversion of N-benzyloxycarbonyl-, N-allyloxycarbonyl-, and N-trichloroethoxycarbonyl-protected amines into nonsymmetric ureas was discovered. In this study, lanthanum triflate was found to be an effective catalyst for preparing various nonsymmetric ureas from protected amines. A variety of protected aromatic and aliphatic carbamates reacted readily with various amines in the presence of lanthanum triflate to generate the desired ureas in high yields. This result demonstrated that this novel lanthanum triflate catalyzed preparation of ureas from Cbz, Alloc, and Troc carbamates can be employed for the formation of various urea structures.

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Du, Xiu-Jiang, Qiang Bian, Hong-Xue Wang, Shu-Jing Yu, Jun-Jie Kou, Zhi-Peng Wang, Zheng-Ming Li, and Wei-Guang Zhao. "Design, synthesis, and fungicidal activity of novel carboxylic acid amides represented by N-benzhydryl valinamode carbamates." Org. Biomol. Chem. 12, no. 29 (2014): 5427–34. http://dx.doi.org/10.1039/c4ob00744a.

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A series of valinamide carbamate derivatives were designed and synthesized by introducing substituted aromatic rings into valinamide carbamate leads. Bioassays showed that some title compounds exhibited very good fungicidal activity.

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Li, Qinghe, Peixue Wang, Shimin Liu, Yuqing Fei, and Youquan Deng. "Catalytic degradation of polyurea: synthesis of N-substituted carbamates with CuO–ZnO as the catalyst." Green Chemistry 18, no. 22 (2016): 6091–98. http://dx.doi.org/10.1039/c6gc01884j.

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N-Substituted carbamates were successfully synthesized in two consecutive steps with the generation of H₂O as the only side product over CuO–ZnO, i.e. synthesis of PUs by fixation of CO₂ with aliphatic and aromatic diamines and the degradation of PUs subsequently.

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Dissertations / Theses on the topic "Aromatic Carbamates"

1

Wang, Wing-chou, and 王筠喬. "Inhibition Mechanisms of Thrombin and Penicillinase by Aromatic Carbamates." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/23369488813862309765.

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Book chapters on the topic "Aromatic Carbamates"

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Heyn, Richard H., Ivo Jacobs, and Robert H. Carr. "Synthesis of Aromatic Carbamates from CO2." In CO2 Chemistry, 83–115. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-12-420221-4.00003-2.

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Begum, Mahima, Bhaswati Sarmah, Gayatri Goswami Kandali, Sontara Kalita, Ipsita Ojha, Raktim Bhagawati, and Lipika Talukdar. "Persistant Organic Pollutants in Soil and Its Phytoremediation." In Biodegradation [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.99835.

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Persistent organic pollutants (POPs) of soil mainly exhibit toxic characteristics that posses hazard to whole mankind. These toxic pollutants includes several group of compound viz., polychlorinated biphenyls, polybrominated biphenyls, polychlorinated dibenzofurans, polycyclic aromatic hydrocarbons, organophosphorus and carbamate insecticides, herbicides and organic fuels, especially gasoline and diesel. They can also be complex mixture of organic chemicals, heavy metals and microbes from septic systems, animal wastes and other sources of organic inputs. Phytoremediation is an emerging technology which can be used for remediation of soil from organic pollutants. In this chapter an attempt has been made to discuss about the sources of organic pollutants, factors that influenced the uptake of organic pollutants by plants, the different mechanism responsible for organic pollutants, phytoremediation of organic pollutants and their advantages and limitation.

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Taber, Douglass F. "Substituted Benzenes: The Alvarez- Manzaneda Synthesis of (–)-Akaol A." In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0063.

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Ramin Ghorbani-Vaghei of Bu-Ali Sina University devised (Tetrahedron Lett. 2012, 53, 2325) conditions for the bromination of an electron-deficient arene such as 1. Yonghong Gu of the University of Science and Technology of China found (Tetrahedron Lett. 2011, 52, 4324) that an electron-rich anilide 3 could be oxidized to 4. Sukbok Chang of KAIST (J. Am. Chem. Soc. 2012, 134, 2528) and Kouichi Ohe of Kyoto University (Chem. Commun. 2012, 48, 3127) devised protocols for the oxidative cyanation of 5 to 6. Phenylazocarboxylates and triazenes are stable, but have the reaction chemistry of diazonium salts. The aromatic substitution chemistry of these derivatives has not been much explored. As illustrated by the conversion of 7 to 8, reported (J. Org. Chem. 2012, 77, 1520) by Markus R. Heinrich of the Universität Erlangen-Nürnberg, the benzene ring of the phenylazocarboxylate is reactive with nucleophiles. In contrast, triazene-activated benzene rings should be particularly reactive with electrophiles, as exemplified by the transformation, below, of 20 to 21. Melanie S. Sanford of the University of Michigan observed (Org. Lett. 2012, 14, 1760) good selectivity for 12 in the Pd-catalyzed reaction of 10 with 11. Jérôme Waser of the Ecole Polytechnique Fédérale de Lausanne used (Org. Lett. 2012, 14, 744) 14 to alkynylate 13 to give 15. Sulfonyl chlorides such as 16 are readily prepared from the corresponding arene, and many are commercially available. Jiang Cheng of Wenzhou University found (Chem. Commun. 2012, 48, 449) conditions for the direct cyanation of 16 to 17. Kenneth M. Nicholas of the University of Oklahoma effected (J. Org. Chem. 2012, 77, 5600) selective ortho bromination of the carbamate 18 to give 19. Stefan Bräse of KIT observed (Angew. Chem. Int. Ed. 2012, 51, 3713) ortho trifluoromethylation of the triazene 20 to give 21. Ji-Quan Yu of Scripps/La Jolla designed (Nature 2012, 486, 518) the benzyl ether 22 to activate the arene for C–C bond formation at the meta position to give 23. Guo-Jun Deng of Xiangtan University employed (Org. Lett. 2012, 14, 1692) a borrowed hydrogen strategy to effect aromatization of 24 with nitrobenzene to give the aniline 25.

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Taber, Douglass F. "Organic Functional Group Protection." In Organic Synthesis. Oxford University Press, 2013. http://dx.doi.org/10.1093/oso/9780199965724.003.0015.

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We found (Tetrahedron Lett. 2010, 51, 3545) that the superiority of KH over NaH in the Williamson ether synthesis was particularly marked with congested partners such as 1. Geert-Jan Boons of the University of Georgia described (Org. Lett. 2010, 12, 4636) the selective removal of each of the several orthogonal protecting groups decorating the disaccharide 3. Yutaka Nishiyama of Kansai University reported (Synlett 2010, 3089) a Re catalyst for the selective acylation of an ether 5, to give the ester 6, from the less substituted side. Duen-Ren Hou of National Central University showed (Tetrahedron Lett. 2010, 51, 6143) that triphenylphosphine hydrobromide was a convenient reagent for debenzylation, converting 7 into 8. Junghyun Chae of Sungshin Women’s University established (Synlett 2010, 1651) that simply microwaving an aromatic methyl ether 9 in an ionic liquid led to smooth demethylation. Allylic selenides such as 11 can serve as masked allylic alcohols. Wei-Ming Xu of Hangzhou Normal University demonstrated (Org. Lett. 2010, 12, 4431) that the polystyrene-supported Se resin facilitated the purification of 11. Oxidation followed by sigmatropic rearrangement then installed the axial secondary alcohol. Clemens Richert of the Universität Stuttgart devised (Synlett 2010, 2267) a reagent 13 for the one-step protection of an amine 14 as its azidomethyl carbamate 15. Xueshun Jia of the Shanghai Institute of Organic Chemistry showed (Tetrahedron Lett. 2010, 51, 6049) that a substoichiometric quantity of Sm metal was sufficient to mediate the acylation of the congested amine 16. Frederik Rombouts of Johnson & Johnson, Beerse, and Andrés A. Trabanco of Johnson & Johnson, Toledo, found (Tetrahedron Lett. 2010, 51, 4815) that the triflic acid debenzylation of 18 was also promoted by microwave irradiation. Mark D. Spicer and John A. Murphy of the University of Strathclyde designed (J. Am. Chem. Soc. 2010, 132, 15462) a stoichiometric Ni reagent that deprotected even the unreactive sulfonamide 20. Steven M. Weinreb of Pennsylvania State University showed (Tetrahedron Lett. 2010, 51, 3555) that an oxime can be deprotected by Fe-mediated reduction of the pivalate 22. David A. Colby of Purdue University protected (Org. Lett. 2010, 12, 5588) the ketone of 24 by forming the adduct with methoxymethylamine, allowing selective addition to the ester, to give 25.

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