Academic literature on the topic 'Isocyanate amine reaction'

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Journal articles on the topic "Isocyanate amine reaction"

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Guerrero-Alburquerque, Natalia, Shanyu Zhao, Daniel Rentsch, Matthias M. Koebel, Marco Lattuada, and Wim J. Malfait. "Ureido Functionalization through Amine-Urea Transamidation under Mild Reaction Conditions." Polymers 13, no. 10 (2021): 1583. http://dx.doi.org/10.3390/polym13101583.

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Ureido-functionalized compounds play an indispensable role in important biochemical processes, as well as chemical synthesis and production. Isocyanates, and KOCN in particular, are the preferred reagents for the ureido functionalization of amine-bearing compounds. In this study, we evaluate the potential of urea as a reagent to graft ureido groups onto amines at relatively low temperatures (<100 °C) in aqueous media. Urea is an inexpensive, non-toxic and biocompatible potential alternative to KOCN for ureido functionalization. From as early as 1864, urea was the go-to reagent for polyurea
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Malwitz, N., and J. E. Kresta. "Amine Catalysis of the Aryl Isocyanate Reaction." Journal of Cellular Plastics 24, no. 5 (1988): 495–523. http://dx.doi.org/10.1177/0021955x8802400503.

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Chalid, Mochamad, Hans J. Heeres та Antonius A. Broekhuis. "Study of Synthesis of Novel ɤ-Valerolactone-Based Polyurethanes". Applied Mechanics and Materials 229-231 (листопад 2012): 297–302. http://dx.doi.org/10.4028/www.scientific.net/amm.229-231.297.

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The ring opening of -valerolactone (GVL) with amine compounds was reported as a promising molecular engineering tool to synthesize precursors for new bio-based polymers such as polyurethanes (PUs). Experimental work on the synthesis of polymers based on GVL/1,2-ethanolamine and GVL/1,2-diaminoethane adducts, and di-isocyanates (1,4-phenylene-di-isocyanate (PDI) 2,4-toluene-di-isocyanate (TDI) and hexamethylene-di-isocyanate (HDI)) is described. The polymers were characterized by FTIR, 1H-NMR, 13C-NMR, elemental analysis and GPC. The best polymerization results were obtained using TEA as the c
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Pyo, Sang-Hyun, Per Persson, M. Amin Mollaahmad, Kent Sörensen, Stefan Lundmark, and Rajni Hatti-Kaul. "Cyclic carbonates as monomers for phosgene- and isocyanate-free polyurethanes and polycarbonates." Pure and Applied Chemistry 84, no. 3 (2011): 637–61. http://dx.doi.org/10.1351/pac-con-11-06-14.

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Polyurethanes and polycarbonates are widely used in a variety of applications including engineering, optical devices, and high-performance adhesives and coatings, etc., and are expected to find use also in the biomedical field owing to their biocompatibility and low toxicity. However, these polymers are currently produced using hazardous phosgene and isocyanates, which are derived from the reaction between an amine and phosgene. Extensive safety procedures are required to prevent exposure to phosgene and isocyanate because of its high toxicity. Therefore, the demand for the production of isocy
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Grehn, Leif, and Ulf Ragnarsson. "Synthesis and use of benzyl tert-butyl iminodicarbonate, a versatile reagent for the preparation of amines." Collection of Czechoslovak Chemical Communications 53, no. 11 (1988): 2778–86. http://dx.doi.org/10.1135/cccc19882778.

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An efficient synthesis of benzyl tert-butyl iminodicarbonate (IV), starting from benzoyl isocyanate, is reported. Reaction of the isocyanate with benzyl alcohol gave benzyl N-benzoylcarbamate (II) which on exhaustive tert-butoxycarbonylation via the non-isolated triacyl amine III, after aminolysis, provided the title compound. The sodium salt V was alkylated with various halides under Gabriel conditions to give in high yields the corresponding benzyloxycarbonyl tert-butoxycarbonyl diprotected amines. Similarly, compound IV was alkylated with alcohols under Mitsunobu conditions to give some add
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Brossier, Thomas, Gael Volpi, Vincent Lapinte, and Sebastien Blanquer. "Synthesis of Poly(Trimethylene Carbonate) from Amine Group Initiation: Role of Urethane Bonds in the Crystallinity." Polymers 13, no. 2 (2021): 280. http://dx.doi.org/10.3390/polym13020280.

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Semi-crystalline poly(trimethylene carbonate) (PTMC) can be efficiently prepared by ring-opening polymerization (ROP) initiated by amine using various catalysts. More promising results were reached with the one-step process of stannous octanoate unlike the two-step one-pot reaction using TBD and MSA catalysts. The ROP-amine of TMC consists in a simple isocyanate free process to produce polycarbonate-urethanes, compatible with the large availability of amines ranging from mono- to multifunctional until natural amino acids. ROP-amine of TMC leads to urethane bonds monitored by FTIR spectroscopy.
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Wong, Shaio-Wen, and Kurt C. Frisch. "Catalysis in competing isocyanate reactions. I. Effect of organotin–tertiary amine catalysts on phenyl isocyanate and N-butanol reaction." Journal of Polymer Science Part A: Polymer Chemistry 24, no. 11 (1986): 2867–75. http://dx.doi.org/10.1002/pola.1986.080241115.

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Cheraiet, Zinelaabine, Souad Ouarna, Sihem Hessainia, Malika Berredjem, and Nour-Eddine Aouf. "N-tert-Butoxycarbonylation of Structurally Diverse Amines and Sulfamides under Water-Mediated Catalyst-Free Conditions." ISRN Organic Chemistry 2012 (May 9, 2012): 1–8. http://dx.doi.org/10.5402/2012/404235.

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A simple, efficient, and eco-friendly protocol for the N-Boc protection of the amine moiety in a variety of compounds with di-tert-butyl dicarbonate under water-acetone catalyst-free conditions is described. The corresponding monocarbamate is obtained in excellent yields on short reaction times. No competitive side reactions such as isocyanate urea and O-Boc were observed. This method represents a reasonable alternative to the previous reported protection procedures.
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Takei, Takayuki, Masahiro Yoshida, Tomonori Nagayoshi, Yasuo Hatate, Kouichiro Shiomori, and Shiro Kiyoyama. "Preparation and Characterisation of Phase Change Material-Loaded Polyurea Microcapsules Several Hundred Micrometres in Diameter." Polymers and Polymer Composites 17, no. 6 (2009): 365–69. http://dx.doi.org/10.1177/096739110901700604.

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In the present study, we attempted to prepare phase-change material (PCM)-loaded polyurea microcapsules several hundred micrometres in diameter via oil-in-water emulsion polymerisation. An oil phase with two types of isocyanate monomers (2,4-toluene diisocyanate (TDI) and phenyl isocyanate (PI)) and tetradecane as PCM was dispersed in an aqueous phase with hexamethylene diamine (HMD). The polyurea shell of microcapsules was formed by reaction of the isocyanate monomers with the amine groups derived from HMD and hydrolysed isocyanate monomers. A suitably adjusted agitation rate made it possible
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Borik, Rita M. "One-Pot Synthesis of Novel Furochromone and Oxazocine Derivatives as Promising Antitumor Agents with Their Molecular Docking Studies." Journal of Chemistry 2020 (April 29, 2020): 1–16. http://dx.doi.org/10.1155/2020/1474050.

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One-pot efficient synthesis of novel chromone derivatives 4a–h and that of 5a–h were described in a simple method via four-component reaction between furochromone carbaldehyde, amine, isocyanate derivatives, and benzoic acid derivatives or nicotinic acid, respectively. Also, oxazocine derivatives 7a, b were prepared via reaction of visnagine carbaldehyde, ethyl acetoacetate and isocyanate derivatives 2a, b. The obtained derivatives of novel furochromone and oxazocine derivatives were evaluated as promising antitumor agents against panel of two human cell lines, hepatocellular carcinoma (HEPG2)
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Dissertations / Theses on the topic "Isocyanate amine reaction"

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Beji, Mohamed. "Heterocumulenes alpha -sulfonyles et leurs applications a la synthese de nouvelles structures heterocycliques : alkylation des esters sulfamiques en catalyse par transfert de phase." Paris 7, 1987. http://www.theses.fr/1987PA077183.

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Serrano, Robledo Eloísa Sofía. "Amide Formation via Ni-Catalyzed Reductive Coupling Reactions with Isocyanates." Doctoral thesis, Universitat Rovira i Virgili, 2018. http://hdl.handle.net/10803/586084.

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Recentment, les reaccions d’acoblament creuat entre electròfils s’han posicionat com a potents alternatives a les reaccions clàssiques d’acoblament creuat entre electròfils orgànics i nucleòfils organometàl•lics. Aquests acoblaments reductius presenten nombrosos avantatges degut a que utilitzen compostos de partida simples i fàcilment assequibles que eviten la necessitat de sintetitzar espècies organometàl•liques sensibles a la humitat i a l’oxigen. Com a conseqüència, els protocols experimentals són pràctics i les condicions de reacció són suaus. A causa de la ubiqüitat de les amides en molèc
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Carrasquillo, Katherine V. "Molecular Interpretation of a Trigger for Controlling an Amine Isocyanate Polyurethane Reaction." 2015. https://scholarworks.umass.edu/masters_theses_2/266.

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The temperature profile needed to complete the reaction between the sodium-diamine complex and the isocyanate terminated prepolymer has been established. The sodium diamine complex has the advantage of blocking the nearly instantaneous reaction between the diamine and isocyanate from taking place until it is released at elevated temperatures. Because of its low melting temperature (~40 °C) and its low molecular weight (low viscosity), this chain extension reaction is not dependent on the participation of the prepolymer. Instead, the rate of reaction is dependent on the dissolution of the 4,4’-
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Book chapters on the topic "Isocyanate amine reaction"

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Krasavin, Mikhail. "Amine (Imine) Component Surrogates in the Ugi Reaction and Related Isocyanide-Based Multicomponent Reactions." In Isocyanide Chemistry. Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527652532.ch6.

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Grimmett, M. R. "Reactions of Tosylmethyl Isocyanide with an Aldehyde and an Amine." In Five-Membered Hetarenes with Two Nitrogen or Phosphorus Atoms. Georg Thieme Verlag KG, 2002. http://dx.doi.org/10.1055/sos-sd-012-00473.

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Shimada, K. "Copper(I)-Catalyzed Reaction of 2-Iodophenyl Isocyanide with Tellurium and an Amine Nucleophile." In Science of Synthesis Knowledge Updates KU 2010/4. Georg Thieme Verlag KG, 2010. http://dx.doi.org/10.1055/sos-sd-111-00122.

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Suginome, M., and Y. Ito. "The Ugi Reaction: Synthesis of α-Acylaminocarboxamides by the Four-Component Coupling of an Isocyanide, a Carbonyl Compound, an Amine, and a Carboxylic Acid." In Three Carbon-Heteroatom Bonds: Nitriles, Isocyanides, and Derivatives. Georg Thieme Verlag KG, 2004. http://dx.doi.org/10.1055/sos-sd-019-00345.

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Conference papers on the topic "Isocyanate amine reaction"

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Back, Darlene M., Paul Buscemi, and David Palmer. "In-Situ Monitoring Of Amine-Isocyanate Reaction By Internal Reflection FTIR." In Intl Conf on Fourier and Computerized Infrared Spectroscopy, edited by David G. Cameron. SPIE, 1989. http://dx.doi.org/10.1117/12.969551.

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Holzworth, Kristin, Gregory Williams, Bedri Arman, Zhibin Guan, Gaurav Arya, and Sia Nemat-Nasser. "Polyurea With Hybrid Polymer Grafted Nanoparticles: A Parametric Study." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-88395.

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The basis of this research is to mitigate shock through material design. In this work, we seek to develop an understanding of parametric variations in polyurea-based nano-composite materials through experimental characterization and computational modeling. Blast-mitigating applications often utilize polyurea due to its excellent thermo-mechanical properties. Polyurea is a microphase-separated segmented block copolymer formed by the rapid reaction of an isocyanate component and an amine component. Block copolymers exhibit unique properties as a result of their phase-separated morphology, which
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