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Relevant bibliographies by topics / Cyclic carbamate

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Academic literature on the topic 'Cyclic carbamate'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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Journal articles on the topic "Cyclic carbamate"

1

McElroy, C. Robert, Fabio Aricò, Franco Benetollo, and Pietro Tundo. "Cyclization reaction of amines with dialkyl carbonates to yield 1,3-oxazinan-2-ones." Pure and Applied Chemistry 84, no. 3 (2011): 707–19. http://dx.doi.org/10.1351/pac-con-11-07-18.

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A number of six-membered cyclic carbamates (oxazinanones) were synthesized from the reaction of a primary amine or hydrazine with a dicarbonate derivative of 1,3-diols in a one-pot reaction, in good yield, short time span, and in the absence of a solvent. The reaction proceeds in two steps: an intermolecular reaction to give a linear intermediate and an intramolecular cyclization to yield the cyclic carbamate. This is the first example of a carbonate reacting selectively and sequentially, firstly at the carbonyl center to form a linear carbamate and then as a leaving group to yield a cyclic ca

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Sauerberg, Per, June Chen, Elizabeth WoldeMussie, and Henry Rapoport. "Cyclic carbamate analogs of pilocarpine." Journal of Medicinal Chemistry 32, no. 6 (1989): 1322–26. http://dx.doi.org/10.1021/jm00126a030.

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Mocilac, Pavle, and John F. Gallagher. "Two isostructural carbamates: theo-tolylN-(pyridin-3-yl)carbamate and 2-bromophenylN-(pyridin-3-yl)carbamate monohydrates." Acta Crystallographica Section E Crystallographic Communications 71, no. 11 (2015): 1366–70. http://dx.doi.org/10.1107/s2056989015019556.

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The title carbamate monohydrates, C13H12N2O2·H2O and C12H9BrN2O2·H2O, form isomorphous crystals that are isostructural in their primary hydrogen-bonding modes. In both carbamates, the primary hydrogen bonding and aggregation involves cyclic amide–water–pyridine moieties as (N—H...O—H...N)2dimers about inversion centres [asR44(14) rings], where the participation of strong hydrogen-bonding donors and acceptors is maximized. The remaining water–carbonyl O—H...O=C interaction extends the aggregation into two-dimensional planar sheets that stack parallel to the (100) plane. The Br derivative does n

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Sakaitani, Masahiro, and Yasufumi Ohfune. "Syntheses and reactions of silyl carbamates. 2. A new mode of cyclic carbamate formation from tert-butyldimethylsilyl carbamate." Journal of the American Chemical Society 112, no. 3 (1990): 1150–58. http://dx.doi.org/10.1021/ja00159a040.

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McAuliffe, Joseph C., Brian W. Skelton, Robert V. Stick та Allan H. White. "β-Acarbose. IV. Model Studies on the Alkylation of Cyclohexylamine with a Carbohydrate Epoxide". Australian Journal of Chemistry 50, № 3 (1997): 209. http://dx.doi.org/10.1071/c96154.

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1,6:3,4-Dianhydro-2-O-benzyl-β-D-galactose has been treated with cyclohexylamine to give an amino alcohol, convertible into 2,3-di-O-acetyl-1,6-anhydro-4-cyclohexylamino-4-deoxy-β-D-glucose by reduction and acetylation. The anhydro bridge of this diacetate has been successfully opened under acetolysis conditions. The original amino alcohol has also been converted into a cyclic carbamate, a carbamate and an aziridine, by utilizing a variety of reagents and conditions. The 1,6-anhydro bridge of the cyclic carbamate, also containing a 2-O-benzyl ether, could be opened under acetolysis conditions

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Tilbrook, Matthew G., Robert V. Stick та Spencer J. Williams. "β-Acarbose. VII. Approaches Towards the Synthesis of Some N-Linked Carba-Oligosaccharides". Australian Journal of Chemistry 52, № 9 (1999): 885. http://dx.doi.org/10.1071/ch99030.

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3,4-Anhydro-1,6-dideoxy-1,6-episeleno-β-D-glucose was treated with cyclohexylamine to afford an amino diol which was subsequently converted into a cyclic carbamate, a compound shown to be a moderately successful glycosyl donor. Treatment of the same 3,4-anhydro sugar and the 1,6-epithio analogue with a 1-epivalienamine derivative afforded the corresponding secondary amines which were converted into the analogous cyclic carbamates. The epithio analogue was unsuccessful as a glycosyl donor, failing to glycosylate a carbohydrate alcohol. On the other hand, the episeleno compound appeared to funct

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McAuliffe, Joseph C., та Robert V. Stick. "β-Acarbose. V. The Synthesis of a Hydroxylated Derivative of a Diastereoisomer of Methyl Acarviosin". Australian Journal of Chemistry 50, № 3 (1997): 219. http://dx.doi.org/10.1071/c96155.

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The treatment of a 1-epivalienamine derivative with 1,6:3,4-dianhydro-2-O-benzyl-β-D-galactose has given an amino alcohol capable of conversion into either a cyclic carbamate or an aziridine. All attempts at acetolysis of the 1,6-anhydro ring of the cyclic carbamate failed owing to the inherent reactivity of the (allylic) benzyl ethers present in the molecule. Therefore, following a reduction with lithium in ammonia and acetylation of the product, a new cyclic carbamate was obtained which underwent successful acetolysis to provide a heptaacetate. This heptaacetate could be transformed into the

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Aeyad, Tahani, Jason Williams, Anthony Meijer, and Iain Coldham. "Lithiation–Substitution of N-Boc-2-phenylazepane." Synlett 28, no. 20 (2017): 2765–68. http://dx.doi.org/10.1055/s-0036-1590857.

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Preparation of 2,2-disubstituted azepanes was accomplished from N-tert-butoxy(N-Boc)-2-phenylazepane by treatment with butyllithium then electrophilic quench. The lithiation was followed by in situ ReactIR spectroscopy and the rate of rotation of the carbamate was determined by variable temperature (VT)-NMR spectroscopy and by DFT studies. Most electrophiles add α to the nitrogen atom but cyanoformates and chloroformates gave ortho-substituted products. Cyclic carbamates were formed from an aldehyde or ketone electrophile. Kinetic resolution with sparteine was only poorly selective. Removal of

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Bresciani, Giulio, Marco Bortoluzzi, Claudia Ghelarducci, Fabio Marchetti та Guido Pampaloni. "Synthesis of α-alkylidene cyclic carbonates via CO2 fixation under ambient conditions promoted by an easily available silver carbamate". New Journal of Chemistry 45, № 9 (2021): 4340–46. http://dx.doi.org/10.1039/d0nj05657j.

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Fletcher, M. H., C. E. Burns-Lynch, K. W. Knouse, L. T. Abraham, C. W. DeBrosse, and W. M. Wuest. "A novel application of the Staudinger ligation to access neutral cyclic di-nucleotide analog precursors via a divergent method." RSC Advances 7, no. 47 (2017): 29835–38. http://dx.doi.org/10.1039/c7ra06045a.

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Herein we present a scalable and divergent synthesis of cyclic di-nucleotide analog precursors facilitated by differentiated di-amino sugars and a Staudinger ligation to provide medium-sized macrocycles featuring carbamate or urea linkages.

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Dissertations / Theses on the topic "Cyclic carbamate"

1

Moody, David Canning. "The synthesis and reactions of phenylsulfanyl substituted cyclic carbamates." Thesis, University of Cambridge, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612894.

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Tas, Huseyin. "Coordination Polymerization Of Cyclic Ethers By Metal Xanthates And Carbamates." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/1225028/index.pdf.

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Zinc xanthates are active catalysts in stereoregular polymerization of propylene oxide and markedly more stable than that of known classical stereoregular catalysts. But steric control of zinc xanthates is weaker. To find more effective catalyst systems the isopropyl xanthates of Cu, Pb, Ni, Fe, Al and Sn are investigated and only copper (Cu(isoPr)Xt) and tin (Sn(isoPr)Xt) isopropyl xanthates were appeared to be active, but Cu(isoPr)Xt yielded only low molecular weight product. Therefore Sn(isoPr)Xt system was investigated in detail in polymerization of propylene oxide (PO). Polymerization of

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Castagnoli, Riccardo. "Synthesis, Characterization, and Applications of a Novel Cu(II)-MOF Based on a Propargylcarbamate-Functionalized Isophthalate Ligand." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23112/.

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This work describes the synthesis of a propargylcarbamate-functionalized isophthalate ligand and its use in the solvothermal preparation of a new copper(II)-based metal organic framework named [Cu(1,3-YBDC)]ˑxH2O (also abbreviated as Cu-MOF. The characterization of this compound was performed using several complementary techniques such as infrared (ATR-FTIR) and Raman spectroscopy, X-ray powder diffraction spectroscopy (PXRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), atomic absorption spectroscopy (AAS) as well as thermal and surface area measurements. Synchr

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Distel, Christopher A. "Effects of an Insecticide on Competition in Anurans: Could Pesticide-Induced Competitive Exclusion be a Mechanism for Amphibian Declines?" Miami University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=miami1280363910.

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Denis, Alexis. "Fonctionnalisations selectives a l'aide des complexes du palladium : synthese de composes d'interet biologiques, cyclopropanes vinyliques, aryl-3 oxazolidinones-2 (inhibiteurs potentiels de la monoamine oxydase)." Paris 6, 1987. http://www.theses.fr/1987PA066335.

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Ce travail porte sur l'utilisation du palladium (o) pour la synthese de molecules d'interet biologique. En premier lieu, on decrit la synthese stereoselective de cyclopropanes vinyliques et de pyrethrinoides. Dans un second temps, on etudie l'echange acetate phenol et l'amination de derives allyliques fibonctionnels. Enfin, on presente la synthese d'aryl-3 dihydroxy-5,5 oxazolidones-2 erythro et threo et etudie leur utilisation en tant qu'inhibiteur d'enzyme monoamine oxidase

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Matondo, Hubert. "Synthese de n-4 pyridylcarbamates a activite herbicide potentielle : etude cinetique de l'influence des solutions micellaires sur leur hydrolyse." Toulouse 3, 1987. http://www.theses.fr/1987TOU30026.

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Wengryniuk, Sarah Elizabeth. "Regioselective Asymmetric a,a-Bisalkylation of Ketones via N-Amino Cyclic Carbamate Chiral Auxiliaries: Methodology Development and Application to the Total Synthesis of both (+)- and (-)-Stigmolone and Apratoxin D." Diss., 2012. http://hdl.handle.net/10161/5574.

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<p>The α-alkylation of ketones is a transformation of central importance to organic synthesis. Our lab recently introduced the N-amino cyclic carbamate (ACC) chiral auxiliaries for asymmetric ketone α-alkylation. ACCs provide significant advantages over existing asymmetric ketone alkylation methods as they are easy to introduce, both deprotonation and alkylation can be run at relatively mild temperatures, stereoselectivity of alkylation is excellent and auxiliary removal is facile. A unique feature of ACCs is their ability to control the regioselectivity of deprotonation through wh

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Knight, John D. "The Anti Selective Aldol Addition of Ketones to Aldehydes Mediated by N-Amino Cyclic Carbamate Chiral Auxiliaries and Its Use in the Asymmetric Total Synthesis of (+)- and (-)-Mefloquine Hydrochloride." Diss., 2012. http://hdl.handle.net/10161/5829.

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<p>In the first part of this dissertation, the first asymmetric anti selective aldol addition of a ketone-derived donor that is independent of the structure of the ketone is described. This transformation is facilitated by the use of chiral N-amino cyclic carbamate (ACC) auxiliaries. Under certain conditions, this transformation not only exhibits near perfect anti selectivity and enantioselectivity but also does so via thermodynamic control. Simple manipulation of the reaction conditions allows for the <italic>O</italic>-benzylation of the prepared aldol products and the subsequent removal of

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Giguère, Alexandre. "Conception et synthèse d’aminoglycosides semi-synthétiques." Thèse, 2012. http://hdl.handle.net/1866/8442.

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Plusieurs aminoglycosides font partie d’une famille d’antibiotiques à large spectre d’action. Les aminoglycosides ayant une activité antibiotique viennent interférer dans la synthèse protéique effectuée par les bactéries. Les protéines mal codées entraineront la mort cellulaire. Au fil des années, de nombreux cas de résistance ont émergé après une utilisation soutenue des aminoglycosides. De nombreux aminoglycosides semi-synthétiques ont été synthétisés avec comme objectif de restaurer leur activité antimicrobienne. Parmi les modifications ayant connu du succès, notons la didésoxygénation d’un

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Book chapters on the topic "Cyclic carbamate"

1

Aricò, Fabio, Alexander Aldoshin, and Pietro Tundo. "Linear and Cyclic Carbamates via Dialkyl Carbonate Chemistry." In Chemistry Beyond Chlorine. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-30073-3_19.

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2

Rossi, L. "Cyclic Carbamates." In Four Carbon-Heteroatom Bonds. Georg Thieme Verlag KG, 2005. http://dx.doi.org/10.1055/sos-sd-018-00672.

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3

Fiera, L. "Synthesis of Six-Membered Cyclic Carbamates from Immobilized -Acylimines." In Heteroatom Analogues of Aldehydes and Ketones. Georg Thieme Verlag KG, 2004. http://dx.doi.org/10.1055/sos-sd-027-00368.

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4

Wolkenberg, S. E., and R. M. Garbaccio. "Intramolecular Nucleophilic Nitrogen Addition to Epoxides To Generate Cyclic Carbamates." In Three Carbon-Heteroatom Bonds: Acid Halides; Carboxylic Acids and Acid Salts. Georg Thieme Verlag KG, 2007. http://dx.doi.org/10.1055/sos-sd-020-00364.

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Taber, Douglass F. "The Garg Synthesis of (–)-N-Methylwelwitindolinone C." In Organic Synthesis. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780190200794.003.0089.

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Of the several welwitindolinones, (–)-N-methylwelwitindolinone C 3 uniquely reverses P-glycoprotein-mediated multiple drug resistance. The preparation of 3 reported (J. Am. Chem. Soc. 2011, 133, 15797) by Neil K. Garg of UCLA illustrates the power in complex target-directed synthesis of late stage C–H functionalization. The starting material 7 for this enantiospecific synthesis was prepared following the Natsume strategy (Chem. Pharm. Bull. 1994, 42, 1393) in the enantiomeric series. Commercial carvone 4 was reduced and protected, then oxidized and equilibrated to the dienone 6. The pivalate efficiently directed the Cu-catalyzed conjugate addition of vinyl magnesium bromide, delivering 7. Hydrolysis of 7 gave 8, to which the bromoindole 9 was added in a conjugate sense to give the adduct as a mixture of diastereomers, of which 1 was the more stable. Exposure of 1 to NaNH2 in t-BuOH presumably generated the benzyne [indolyne] 10, which cyclized to the ketone 2. The silyl ether 2 was deprotected and the alcohol was oxidized to give the diketone, which was selectively carried on to the enol triflate and thus to the stannane 11. The alkenyl chloride of the natural product was installed by the oxidation of 11 with CuCl2. Further oxidation with N-bromosuccinimide then delivered the oxindole 12. In the last stage of the synthesis, it was necessary to selectively aminate one of the bridgehead C–H’s of 12. To this end, the ketone was reduced and carried on to the carbamate 13. Attempts to oxidatively cyclize 13 with Rh catalysts failed, but Ag was successful, delivering 14. The final conversion of 15 to (–)-N-methylwelwitindolinone C 3 was achieved by exposure to the Kim reagent 16.

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Conference papers on the topic "Cyclic carbamate"

1

Chandiramani, Dipak K., and Suresh K. Nawandar. "Assessment of Weep Holes in Cylindrical Shell Based on Elastic-Plastic Stress Analysis Method." In ASME 2014 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/pvp2014-28075.

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In urea plant equipment, particularly those operating in the synthesis cycle, anti-corrosive liner plates are usually applied to the pressure retaining carbon steel vessel walls. Even with the correct material selection, controlled fabrication methods and maintenance, the risk of highly corrosive urea-carbamate solution leaking through these liners always exists in these equipment which might eventually damage the carbon steel walls. Existing designs of these equipment utilizes “weep holes” to reveal such leakages. Various designs exist, but in general these weep holes are 15–20mm dia. plain o

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