Category: pyrrolines

Academic researchers, R&D teams, teachers, students, policy makers and the media all rely on us to share knowledge that is reliable, accurate and cutting-edge.3317-61-1, Name is 5,5-Dimethyl-1-pyrroline N-oxide, molecular formula is C6H11NO, belongs to pyrrolines compound, is a common compound. In a patnet, author is Jan Kruzelak, once mentioned the new application about 3317-61-1, Related Products of 3317-61-1.

Cross-Linking of Rubber Matrices with Dicumyl Peroxide and Zinc Dimethacrylate. Part I: Effect of Co-Agent Content

The work is focused on the investigation of the influence of the amount of co-agent on cross-linking and properties of rubber compounds. The in-situ radical polymerization of zinc dimethacrylate occurs during the curing process of rubber compounds with organic peroxide. Polymerized zinc dimethacrylate tends to form different types of chemical and physical linkages within the rubber matrices. As the amount of dimethacrylate ranged from 10 to 50 phr, the conversion of zinc dimethacrylate remained low. Residual zinc dimethacrylate formed micro-dispersion in the rubber matrix. The dispersion and distribution of zinc dimethacrylate in the rubber depends on the viscosity of matrix, shear stress and polarity of the matrix. Despite low conversion of zinc dimethacrylate, the application of co-agent resulted in the increase of cross-link density and improvement of physical-mechanical properties of vulcanizates.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem

You could be based in a university, combining chemical research with teaching; working on developing and trialing new drugs; or helping to ensure national healthcare provision keeps pace with new discoveries. 38609-97-1, Name is 2-(9-Oxoacridin-10(9H)-yl)acetic acid, molecular formula is C15H11NO3, belongs to pyrrolines compound, is a common compound. In a patnet, author is Feberero, Claudia, once mentioned the new application about 38609-97-1, Electric Literature of 38609-97-1.

Experimental and Computational Study of the 1,5-O -> N Carbamoyl Snieckus-Fries-Type Rearrangement

The reactions of o-lithiated O-aryl N,N-diethylcarbamates with different C-N multiple bond electrophiles have been thoroughly studied. A 1,5-O -> N carbamoyl shift, a new variation of the anionic Fries-type rearrangement, takes place when nitriles, imines, or alkylcarbodiimides are employed. In these cases, the carbamoyl group plays a dual role as a directing group, building up a variety of functional groups through the 1,5-O -> N carbamoyl migration. On the other hand, the use of iso(thio)cyanates and arylcarbodiimides led to non-rearranged o-functionalized O-arylcarbamates. This reactivity was further computationally explored, and the governing factor could be traced back to the relative basicity of the alternative products (migrated vs nonmigrated substrates). This exploration also provided interesting insights about the degree of complexation of the lithium cations onto these substrates. A new access to useful 2-hydroxybenzophenone derivatives has also been developed.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem

Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. 611-64-3, Name is 9-Methylacridine, molecular formula is C14H11N, belongs to pyrrolines compound, is a common compound. In a patnet, author is He, Xing, once mentioned the new application about 611-64-3, COA of Formula: https://www.ambeed.com/products/611-64-3.html.

Sodium as High-efficient Catalyst in Hydroboration of Unsaturated Compounds

The catalysts used to catalyze the hydroboration of nitriles or carbodiimides usually have some disadvantages such as complex structure, high cost, large pollution of environment and so on. It is an important development direction to use the main group metals instead of the transition metals to reduce the costs and realize green catalysis. In this paper, using NaH or NaOH as a catalyst, an efficient reaction of nitrile or carbodiimide with pinacol borane (HBPin) has been achieved. It was found that 3.5 mol% of NaH participated in the hydroboration reaction in a simple and effective method under slight solvent-free circumstances. In addition, intermolecular chemoselectivity hydroboration of nitrile and substrates with different functional groups was also investigated by employing three different catalysts. This reaction uses the inorganic alkali with simple structure, commercially available and low cost to synthesize organoborane compounds, which provides ideas for industrial development.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem

Chemistry graduates have much scope to use their knowledge in a range of research sectors, including roles within chemical engineering, chemical and related industries, healthcare and more. 54663-78-4, Name is Tributyl(thiophen-2-yl)stannane, molecular formula is , belongs to pyrrolines compound. In a document, author is Acharyya, Arusha, Reference of 54663-78-4.

Assessing the Effect of Hofmeister Anions on the Hydrogen-Bonding Strength of Water via Nitrile Stretching Frequency Shift

The temperature dependence of the peak frequency (nu(max)) of the C equivalent to N stretching vibrational spectrum of a hydrogen-bonded C equivalent to N species is known to be a qualitative measure of its hydrogen-bonding strength. Herein, we show that within a two-state framework, this dependence can be analyzed in a more quantitative manner to yield the enthalpy and entropy changes (Delta H-HB and Delta S-HB) for the corresponding hydrogen-bonding interactions. Using this method, we examine the effect of ten common anions on the strength of the hydrogen-bond(s) formed between water and the C equivalent to N group of an unnatural amino acid, p-cyanophenylalanine (Phe(CN)). We find that based on the Delta H-HB values, these anions can be arranged in the following order: HPO42- > OAc- > F- > SO42- approximate to Cl- approximate to (H2O) approximate to ClO4- approximate to NO3- > Br- > SCN- approximate to I-, which differs from the corresponding Hofmeister series. Because PheCN has a relatively small size, the finding that anions having very different charge densities (e.g., SO42- and ClO4-) act similarly suggests that this ranking order is likely the result of specific ion effects. Since proteins contain different backbone and side-chain units, our results highlight the need to assess their individual contributions toward the overall Hofmeister effect in order to achieve a microscopic understanding of how ions affect the physical and chemical properties of such macromolecules. In addition, the analytical method described in the present study is applicable for analyzing the spectral evolution of any vibrational spectra composed of two highly overlapping bands.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem

Application of 56-12-2, New discoveries in chemical research and development in 2021. In classical electrochemical theory, both the electron transfer rate and the adsorption of reactants at the electrode control the electrochemical reaction. 56-12-2, Name is 4-Aminobutyric acid, SMILES is O=C(O)CCCN, belongs to pyrrolines compound. In a article, author is Yoon-Miller, Sarah J. P., introduce new discover of the category.

Suzuki-Miyaura Arylations of Tetramic Acid Sulfonates: Evaluation of Lactam Protection, Sulfonate Esters, and Sterics

The synthesis of 3,4-diaryl-3-pyrroline-2-ones and 4-aryl-3-pyrrolin-2-ones using Suzuki-Miyaura cross-coupling reactions of tetramic acid sulfonates with arylboronic acids has been studied. The effect that sulfonate ester, sterics, and lactam protection has on the cross-coupling reaction was evaluated. As expected, triflates were better cross-coupling partners than the corresponding tosylates. The yields were only partially affected by the incorporation of aryl groups at the 3-position. Importantly, tetramic acid triflates (and to a lesser extent tosylates) lacking a lactam protecting group were still competent substrates.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem

As a society publisher, everything we do is to support the scientific community – so you can trust us to always act in your best interests, and get your work the international recognition that it deserves. 67604-48-2, Name is 5,7-Dihydroxy-2-(4-hydroxyphenyl)chroman-4-one, molecular formula is C15H12O5, belongs to pyrrolines compound, is a common compound. In a patnet, author is Arcadi, Antonio, once mentioned the new application about 67604-48-2, Synthetic Route of 67604-48-2.

A new approach to the synthesis of highly substituted 3-pyrrolin-2-ones

The base-promoted cyclization of internal N-propargyl-malonamides in the presence of carbonate bases at room temperature or at 80 degrees C affords highly substituted 3-pyrrolin-2-ones in good yields.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem

SDS of cas: 95-45-4, Chemical research careers are more diverse than they might first appear, as there are many different reasons to conduct research and many possible environments. 95-45-4, Name is Dimethylglyoxime, SMILES is CC(/C(C)=N/O)=NO, belongs to pyrrolines compound. In a article, author is Smith, AB, introduce new discover of the category.

A second-generation synthesis of scalemic 3,5,5-trisubstituted pyrrolin-4-ones: Incorporation of functionalized amino acid side-chains

To access mimics of peptidal beta-strands (1), scalemic 3,5,5-trisubstituted pyrrolin-4-ones bearing the tyrosine, serine, and lysine side-chains have been generated via cyclization of metalated imino esters and deprotection. The functionalized imino esters were prepared by asymmetric alkylation of a common oxazolidinone precursor (2) derived from L-prenylglycine. (C) 1997 Elsevier Science Ltd.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem

Product Details of 5306-85-4, Chemical research careers are more diverse than they might first appear, as there are many different reasons to conduct research and many possible environments. 5306-85-4, Name is (3R,3aR,6S,6aR)-3,6-Dimethoxyhexahydrofuro[3,2-b]furan, SMILES is CO[C@H]1CO[C@@]2([H])[C@]1([H])OC[C@H]2OC, belongs to pyrrolines compound. In a article, author is Yoon-Miller, Sarah J. P., introduce new discover of the category.

Short synthesis of 4-aryl-3-pyrrolin-2-ones

A three step, convergent synthesis of 4-aryl-3-pyrrolin-2-ones from a tetramic acid has been developed. The key transformation utilized a Suzuki-Miyaura cross-coupling reaction between a 4-tosyloxy-3-pyrrolin-2-one and an arylboronic acid. This work also provides access to 4-arylpyrrolidin-2-ones, cyclic analogs of gamma-aminobutyric acid (GABA). Hydrogenation of 4-(4′-chloro-phenyl)-3-pyrrolin-2-one proceeded smoothly to give baclofen lactam. (c) 2006 Elsevier Ltd. All rights reserved.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem

Some examples of the diverse research done by chemistry experts include discovery of new medicines and vaccines, improving understanding of environmental issues, and development of new chemical products and materials. 154026-95-6, Name is tert-Butyl (4R-cis)-6-[(acetyloxy)methyl]-2,2-dimethyl-1,3-dioxane-4-acetate, molecular formula is C15H26O6, belongs to pyrrolines compound, is a common compound. In a patnet, author is Plaszko, Tamas, once mentioned the new application about 154026-95-6, Synthetic Route of 154026-95-6.

Volatile Organic Compounds (VOCs) of Endophytic Fungi Growing on Extracts of the Host, Horseradish (Armoracia rusticana)

The interaction between plant defensive metabolites and different plant-associated fungal species is of high interest to many disciplines. Volatile organic compounds (VOCs) are natural products that are easily evaporated under ambient conditions. They play a very important role in inter-species communication of microbes and their hosts. In this study, the VOCs produced by 43 different fungal isolates of endophytic and soil fungi during growth on horseradish root (Armoracia rusticana) extract or malt extract agar were examined, by using headspace-gas chromatography-mass spectrometry (headspace-GC-MS) and a high relative surface agar film as a medium. The proposed technique enabled sensitive detection of several typical VOCs (acetone, methyl acetate, methyl formate, ethyl acetate, methyl butanol isomers, styrene, beta-phellandrene), along with glucosinolate decomposition products, including allyl cyanide and allyl isothiocyanate and other sulfur-containing compounds-carbon disulfide, dimethyl sulfide. The VOC patterns of fungi belonging to Setophoma, Paraphoma, Plectosphaerella, Pyrenochaeta, Volutella, Cadophora, Notophoma, and Curvularia genera were described for the first time. The VOC pattern was significantly different among the isolates. The pattern was indicative of putative myrosinase activity for many tested isolates. On the other hand, endophytes and soil fungi as groups could not be separated by VOC pattern or intensity.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem

Reference of 3317-61-1, Chemistry involves the study of all things chemical – chemical processes, chemical compositions and chemical manipulation – in order to better understand the way in which materials are structured, how they change and how they react in certain situations. 3317-61-1, Name is 5,5-Dimethyl-1-pyrroline N-oxide, SMILES is CC1(C)CCC=[N+]1[O-], belongs to pyrrolines compound. In a article, author is Ildiz, Gulce O., introduce new discover of the category.

Conformational Analysis, Spectroscopy and Photochemistry of Matrix-Isolated 1H- and 2H- Tautomeric Forms of Ethyl Tetrazole-5-Carboxylate

The preferred conformations, infrared spectra and photochemistry of matrix-isolated 1H and 2H tautomers of ethyl tetrazole-5-carboxylate (ET5C) were investigated. Experimentally, isolated monomeric forms of the two tautomers were trapped in cryogenic argon matrices (15 K), and studied by infrared spectroscopy. Identification of the conformational species trapped in the matrices was undertaken by combining the experimental spectro-scopic data with results of quantum chemical calculations performed at the DFT(B3LYP)/6-311++G(d,p) level of theory. For each tautomer, two conformers were observed in the matrices, all forms exhibiting the ester group in the anti configuration (C-O-C-C dihedral equal to 180 degrees). In turn, the conformers having a gauche ester group that are predicted by the calculations to be significantly populated in the gas phase equilibrium (room temperature), were found to convert into the anti forms during matrix deposition (conformational cooling). Very interestingly, and contrarily to what is in general found for tetrazoles, the 1H tautomer is the most stable tautomer of ET5C, and strongly predominates in the studied matrices. Narrowband UV irradiation (lambda = 250 nm) was found to lead to tetrazole fragmentation, with release of molecular nitrogen and production of four isomeric photoproducts (diazirine, cyanamide, carbodiimide and nitrile imine), all of them being successfully identified through comparison of the experimental spectroscopic spectra of the irradiated matrices with the DFT(B3LYP)/6-311++G(d, p) predicted infrared spectra of these species. This study also stresses the structural relevance of the N-H//O = C intramolecular interaction between the ring hydrogen atom and the carbonyl group of the substituent in the 1H tautomer of ET5C.

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Pyrroline – Wikipedia,
,1-Pyrroline | C4H7N – PubChem