Results 91 to 100 of about 18,349 (284)

Oxidation of 3- and 4-Methylpyridines on Vanadium-Anatase and Vanadium-Rutile Catalysts

Eurasian Chemico-Technological Journal, 2012
Heterogeneous catalytic vapor-phase oxidation of methylpyridines is "green", the most simple and perspective method for obtaining pyridinecarboxylic acids.
O. K. Yugay, T. P. Mikhailovskaya, D. Kh. Sembaev, P. B. Vorobyev   +3 more
doaj   +1 more source

An Efficient Green Approach for the Synthesis of Fluoroquinolones Using Nano Zirconia Sulfuric Acid as Highly Efficient Recyclable Catalyst in two Forms of Water [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2018
Various antibacterial fluoroquinolone compounds were prepared by the direct amination of 7-halo-6- fluoroquinolone-3-carboxylic acids with a variety of piperazine derivatives and (4aR,7aR)-octahydro-1H-pyrrolo[3,4-b] pyridine using Zirconia Sulfuric Acid
Ahmad Nakhaei, Abolghasem Davoodnia, Sepideh Yadegarian   +2 more
doaj  

Synthesis of Fullerene-Fused Lactones and Fullerenyl Esters: Radical Reaction of [60]Fullerene with Carboxylic Acids Promoted by Manganese(III) Acetate and Lead(IV) Acetate [PDF]

, 2016
The manganese(III) acetate-mediated radical reaction of [60]fullerene with carboxylic acids in the presence of 4-(dimethylamino)pyridine exclusively afforded the [60]fullerene-fused lactones.
Yong-Shun Huang (2343814), Guan-Wu Wang (1456660), Tong-Xin Liu (1456666), Fa-Bao Li (1456663)   +3 more
core   +1 more source

Synthesis of Functionalized Azobiphenyl‐ and Azoterphenyl‐ Ditopic Linkers: Modular Building Blocks for Photoresponsive Smart Materials

ChemistryOpen, 2019
Modular synthesis of structurally diverse functionalized azobiphenyls and azoterphenyls for the realization of optically switchable materials has been described.
Dr. Sylvain Grosjean, Patrick Hodapp, Dr. Zahid Hassan, Prof. Dr. Christof Wöll, Dr. Martin Nieger, Prof. Dr. Stefan Bräse   +5 more
doaj   +1 more source

PERFIL VOLÁTIL DO Coffea arabica E Coffea canephora var. conilon POR SHS-GC-MS E QUIMIOMETRIA [PDF]

Química Nova
The volatile composition of coffee exerts a substantial influence on its quality, as it defines the characteristics of the beverage. However, these compounds are influenced by factors within the coffee production chain, such as botanical origin ...
Marcos Valério Vieira Lyrio, Pedro Henrique Pereira da Cunha, Danieli Grancieri Debona, Bárbara Zani Agnoletti, Roberta Quintino Frinhani, Emanuele Catarina da Silva Oliveira, Paulo Roberto Filgueiras, Lucas Louzada Pereira, Eustáquio Vinicius Ribeiro de Castro   +8 more
doaj   +1 more source

Cobalt(II) Coordination Polymers Assembled from Unexplored Pyridine-Carboxylic Acids: Structural Diversity and Catalytic Oxidation of Alcohols [PDF]

, 2019
New coordination polymers of cobalt­(II), namely, [Co­(μ4-cpna)­(H2O)2]n (1), [Co­(μ3-cpna)­(phen)­(H2O)]n·nH2O (2), [Co3­(μ4-dppa)2­(H2O)6]n·2nH2O (3), and [Co3­(μ5-dppa)2­(μ-4,4′-bipy)­(H2O)2]n·4nH2O (4), have been generated under hydrothermal ...
Jinzhong Gu, Jinzhong Gu (2076685), Dmytro S. Nesterov (2076637), Alexander M. Kirillov (1405552), Dmytro S. Nesterov, Zifa Shi, Min Wen, Alexander M. Kirillov, Min Wen (3549752), Marina V. Kirillova, Yan Cai (298695), Marina V. Kirillova (1446604), Zifa Shi (6282092), Yan Cai   +13 more
core   +1 more source

Research on heterocyclic compounds, Part 40. 2-Phenylimidazo[1,2-a]pyridine-3-carboxylic acid derivatives: synthesis and antiinflammatory activity. [PDF]

, 1998
A series of 2-phenylimidazo[1,2-a]pyridine-3-carboxylic esters, acids, and amides were synthesized and pharmacologically tested in order to evaluate their antiinflammatory and analgesic activity and their ulcerogenic action on the gastro-intestinal tract.
RIMOLI, MARIA GRAZIA, G. Falcone, FILIPPELLI, Amelia, L. Avallone, M. G. Rimoli, ABIGNENTE DI FRASSELLO, ENRICO, E. Abignente, W. Filippelli, F. Arena, F. ARENARE, A. Di Chiacchio, A. FILIPPELLI   +11 more
core  

COMPLEX COMPOUNDS OF BIPOSITIVE SILVER WITH PYRIDINE CARBOXYLIC ACIDS. PART III. ARGENTIC COMPOUNDS OF PYRIDINE TRICARBOXYLIC ACIDS

, 1957
In continuation of the previous work on silver(II) complexes of pyridine mono- and dicarboxylic acids it has now been possible to prepare the argentic complexes of some of the pyridine tricarboxylic acids, namely pyridine-2 :3:6-, -2:4:5, and -2 :4 :6-carboxylic acids. Argentic complexes of all the three acids were obtained by the persulphate oxidation
BIRESWAR BANERJEE, PRIYADARANJAN RAY
openaire   +2 more sources

Different outcomes in the reactions of WCl6 with carboxylic acids [PDF]

, 2015
The reactions of WCl6 with a selection of carboxylic acids were investigated by using dichloromethane as reaction medium. The addition of pyridine-3-carboxylic acid (niacin) to WCl6 gave [C5H4NHC(O)Cl][WOCl5], 1, in 75% yield via selective Cl/O ...
Bortoluzzi, Marco, Zacchini, S., Pampaloni, G., Guarra, Federica, Marchetti, F., Guarra, F., MARCHETTI, FABIO, PAMPALONI, GUIDO, Zacchini, Stefano   +8 more
core   +1 more source

Infrared Spectra of Pyrazine-and Pyridine-carboxylic Acid and Their Derivatives.

Chemical and Pharmaceutical Bulletin, 1959
Infrared absorption spectra of pyridine- and pyrazine-carboxylic acids have following characteristic absorptions. 1) There are broad absorption bands with peaks at 2450 and 1900 cm-1. The former shifts to around 1900 cm-1 by deuteration but the latter does not. 2) Absorptions for O-H in-plane deformation and C-O stretching vibration are present at 1340∼
Yoshida, Shigeru, Asai, Motoji
openaire   +2 more sources