Results 1 to 10 of about 197,331 (314)

Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents, Part I: Pyridine mono-carboxylic acids [PDF]

Journal of the Serbian Chemical Society, 2005
Rate constants for the reaction of diazodiphenylmethane with isomeric pyridine carboxylic acids were determined in chosen protic and aprotic solvents at 30 °C, using the well known UV spectrophotometric method.
Marinković Aleksandar D., Drmanić Saša Ž., Jovanović Bratislav Ž., Mišić-Vuković Milica M.   +3 more
doaj   +4 more sources

Investigations of the reactivity of pyridine carboxylic acids with diazodiphenylmethane in protic and aprotic solvents. Part II. Pyridine mono-carboxylic acid N-oxides [PDF]

Journal of the Serbian Chemical Society, 2006
The rate constants for the reaction of three isomeric pyridine mono-carbocylic acid N-oxides with diazodiphenylmethane were determined at 30 ºC in thirty two protic and aprotic solvents by the well known UV spectrophotometric method.
MILICA MISIC-VUKOVIC, ALEKSANDAR D. MARINKOVIC, BRATISLAV Z. JOVANOVIC, SASA Z. DRMANIC   +3 more
doaj   +5 more sources

The effects of solvents and structure on the electronic absorption spectra of the isomeric pyridine carboxylic acid N-oxides [PDF]

Chemical Industry and Chemical Engineering Quarterly, 2013
The ultraviolet absorption spectra of the carboxyl group of three isomeric pyridine carboxylic acids N-oxides (picolinic acid N-oxide, nicotinic acid N-oxide and isonicotinic acid N-oxide) were determined in fourteen solvents in the wavelength range ...
Drmanić Saša Ž., Nikolić Jasmina B., Marinković Aleksandar D., Šekularac Gavrilo M., Jovanović Bratislav Ž.   +4 more
doaj   +4 more sources

Influence of pyridyl nitrogen’s position and hydrogen bonding interactions on antibacterial activities investigated by in vitro and in silico [PDF]

Scientific Reports
Pyridine derivatives are multifunctional materials with various biological activities viz., antibacterial, antiviral, anticancer, antihistamine, etc. and are also the building blocks in supramolecular chemistry.
Suma Ramachandra Gopady, Thripthi Nagesh Shenoy, Abdul Ajees Abdul Salam, Srikrishna Herga Damodar Kedlaya, Shashanka Puranika Kota, Anusha Prabhu, Yegneswaran Prakash Peralam, Srinivasulu Maddasani   +7 more
doaj   +2 more sources

On-tissue derivatization for mass spectrometry imaging reveals the distribution of short chain fatty acids in murine digestive tract [PDF]

Frontiers in Cellular and Infection Microbiology
Short-chain fatty acids (SCFAs), which are produced by microorganisms in the digestive tract of animals, play an important role in maintaining homeostasis in the host, including immune function.
Kaoru Nakagawa, Mami Okamoto, Masako Nishida, Kenta Terashima, Manami Kobayashi, Kanae Teramoto, Akiko Kubo   +6 more
doaj   +2 more sources

2-(Phenylsulfanyl)pyridine-3-carboxylic acid [PDF]

Acta Crystallographica Section E Structure Reports Online, 2009
The title compound, C(12)H(9)NO(2)S, belongs to the nitro-gen-containing group of heterocyclic organic compounds and crystallized with two mol-ecules per asymmetric unit. In the crystal, both molecules form investment dimers linked by pairs of O-H-O hydrogen bonds. Weak symmetry-related C-H-O inter-actions link the carboxyl dimers along b axis.
Muhammad Naeem Khan, Misbahul Ain Khan, Muhammad Nadeem Arshad, Islam Ullah Khan, Salma Rehman   +4 more
openaire   +3 more sources

2-(Carboxymethylsulfanyl)pyridine-3-carboxylic acid monohydrate [PDF]

Acta Crystallographica Section E Structure Reports Online, 2010
The title compound, C(8)H(7)NO(4)S·H(2)O, was obtained by reaction of 2-mercaptopyridine-3-carboxylic acid with chloro-acetic acid. In the mol-ecular structure, the dihedral angle between the two least-squares planes defined by the pyridine ring and the carb-oxy group is 8.32 (9)°.
Xiao-Juan Wang, Yun-Long Feng
openaire   +3 more sources

2-Bromopyridine-3-carboxylic acid [PDF]

Acta Crystallographica Section E Structure Reports Online, 2010
Le résidu d'acide carboxylique dans le composé du titre, C(6)H(4) BrNO (2), est tordu hors du plan des autres atomes, comme indiqué par l'angle de torsion (Br) C-C-C-O (carbonyl) de -20,1 (9)°. Dans le cristal, des chaînes supra-moléculaires médiées par des liaisons hydrogène O-H ?N sont formées avec le vecteur de base [201] et les interactions C-H ?O ...
R.A. Howie, Rinaldo Gonçalves, M.V.N. De Souza, Edward R. T. Tiekink, J.L. Wardell   +4 more
openaire   +3 more sources

Convenient approaches to the synthesis of 6-amino- and 6-oxoimidazo[4,5-b]pyrazolo[3,4-e]pyridines

Журнал органічної та фармацевтичної хімії, 2021
Aim. To develop convenient approaches to the synthesis of 6-amino- and 6-oxoimidazo[4,5-b]pyrazolo[3,4-e]pyridines as promising biologically active scaffolds. Results and discussion.
Georgiy G. Yakovenko, Mikhailo V. Vovk
doaj   +1 more source

N-Methylimidazole Promotes The Reaction Of Homophthalic Anhydride With Imines [PDF]

, 2014
The addition of N-methylimidazole (NMI) to the reaction of homophthalic anhydride with imines such as pyridine-3-carboxaldehyde-N-trifluoroethylimine (9) reduces the amount of elimination byproduct and improves the yield of the formal cycloadduct ...
Aaron Levin, Bally T., Bogdanov M. G., David M. Floyd, Deng W., Flannery E. L., González-López M., Guibe-Jampel E., Guiguemde W. A., Haimova M. A., Höfle G., Jain R., Jian Liu, Kandinska M. I., Lenarcik B., Lindner C., Lutnæs O. B., Pattawong O., Paul R. Rablen, Scriven E. F. V., Spencer Knapp, Taydakov I. V., Thomas J. Emge, Vara Y., Yu N., Zheng Wang   +25 more
core   +6 more sources