Results 41 to 50 of about 10,038 (159)

Synthetic Studies on Bioactive Natural Polyketides: Intramolecular Nitrile Oxide-Olefin Cycloaddition Approach for Construction of a Macrolactone Skeleton of Macrosphelide B

Molecules, 2011
Studies on the synthesis of macrosphelide B via an intramolecular nitrile oxide-olefin cycloaddition (INOC) is described. In particular, an asymmetric INOC approach using phase transfer catalysts seems to be a potentially efficient and versatile ...
Seung-Mann Paek, Young-Ger Suh
doaj   +1 more source

Introduction of an isoxazoline unit to the β-position of porphyrin via regioselective 1,3-dipolar cycloaddition reaction

Beilstein Journal of Organic Chemistry, 2019
Isoxazoline-linked porphyrins have been synthesized by a regioselective 1,3-dipolar cycloaddition reaction between vinylporphyrin 2 and nitrile oxides. The steric interaction directed the reaction trajectory, in which only the product with a link between
Xiujun Liu, Xiang Ma, Yaqing Feng
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A Comprehensive Study of the Synthesis, Spectral Characteristics, Quantum–Chemical Molecular Electron Density Theory, and In Silico Future Perspective of Novel CBr₃-Functionalyzed Nitro-2-Isoxazolines Obtained via (3 + 2) Cycloaddition of (E)-3,3,3-Tribromo-1-Nitroprop-1-ene

Molecules
The search for new heterocyclic compounds with biological potential is one of the current challenges in modern chemistry. Therefore, the comprehensive study of (3 + 2) cycloaddition (32CA) reactions between a series of aryl-substituted nitrile N-oxides ...
Karolina Zawadzińska-Wrochniak, Karolina Kula, Mar Ríos-Gutiérrez, Bartłomiej Gostyński, Tomasz Krawczyk, Radomir Jasiński   +5 more
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Cycloaddition of Nitrile Oxides to Substituted Vinylphosphonates.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Yong Ye, Guo‐Yan Xu, Yu Zheng, Lun‐Zu Liu   +3 more
openaire   +1 more source

Functionalisation of Artemisinin and Its Ring-contracted Derivatives

Molecules, 2007
Isoxazoline analogues of artemisinin were obtained in low yield and low diastereoselectivity from the 1,3-dipolar cycloaddition of nitrile oxides. Alternatively, starting from the aldehyde 7, a number of transformations - Wittig reaction and reduction ...
Wim Dehaen, Sarah Van Mierloo, Tine Van Neck   +2 more
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Study on Nitrile Oxide for Low-Temperature Curing of Liquid Polybutadiene. [PDF]

Materials (Basel), 2022
Li P, Wang X.
europepmc   +1 more source

Ion–molecule reactions between ionized nitrile oxides and neutral nitrile

International Journal of Mass Spectrometry, 2002
Abstract The ion–molecule reactions of ionized nitrile oxide, RCN + O , with several neutral nitriles have been studied using both tandem mass spectrometric techniques and ab initio molecular orbital calculations. Ionized oxygen atom transfer as well as a formal substitution of nitric oxide by the neutral reagent in the radical cation were the ...
Gerbaux, Pascal, Barbieux-Flammang, Monique, Flammang, Robert, Bouchoux, Guy   +3 more
openaire   +2 more sources

Effect of Graphene Oxide on Anti-aging Property of Nitrile Butadiene Rubber

Cailiao gongcheng, 2017
The blends with higher damping performance was prepared based on nitrile butadiene rubber(NBR) with addition of graphene oxide(GO) and modified graphene oxide(MGO) prepared by improved Hammer method.
ZHANG Lin, CHEN Duo-li, ZHU Min-hao, CAI Zhen-bing, PENG Jin-fang   +4 more
doaj   +1 more source

Comparison of adsorption properties of zinc oxide and shungite related to their influence as an activator of sulfur vulcanization

Тонкие химические технологии, 2012
Determination of the adsorption characteristics of zinc oxide and shungite with respect to benzene vapor adsorption was carried out by the BET method. The specific surface area was calculated, the curves of pore volumes distribution according to their ...
E. A. Astakhova, Kim Bong Hoang, V. A. Shershnev, S. V. Reznichenko   +3 more
doaj  

Ionic elastomers based on carboxylated nitrile rubber (XNBR) and magnesium aluminum layered double hydroxide (hydrotalcite)

eXPRESS Polymer Letters, 2014
The presence of carboxyl groups in carboxylated nitrile butadiene rubber (XNBR) allows it to be cured with different agents. This study considers the effect of crosslinking of XNBR by magnesium aluminum layered double hydroxide (MgAl-LDH), known also as ...
A. Laskowska, M. Zaborski, G. Boiteux, O. Gain, W. Maniukiewicz, A. Marzec   +5 more
doaj   +1 more source