Results 171 to 180 of about 4,994,766 (232)

Picolinic acid as a matrix for laser mass spectrometry of nucleic acids and proteins.

Rapid Communications in Mass Spectrometry, 1994
We found that picolinic acid is a very good matrix for matrix-assisted laser desorption/ionization (MALDI) time-of-flight mass spectrometry of oligonucleotides, proteins and tRNA.
K. Tang, N. Taranenko, S. Allman, C. H. Chen, L. Y. Chág, K. Jacobson   +5 more
semanticscholar   +4 more sources

The Preparation of Isonicotinic and Picolinic Acids

Journal of the American Chemical Society, 1952
D. J. Cook, R. S. Yunghans
semanticscholar   +3 more sources

Effect of Methyl Substitution on the Decarboxylation of Picolinic Acids [PDF]

Journal of the American Chemical Society, 1952
Nelson H. Cantwell, E. Brown
semanticscholar   +2 more sources

Speciation studies of binary and ternary complexes formed with oxidovanadium(IV) ion picolinic acid and some amino acids

Physics and chemistry of liquids (Print), 2020
In the present work the chemical speciation of ternary complexes systems formed by VO2+ ion with picolinic acid and the amino acids = α-alanine (HαAla), glycine (HGly), serine (HSer), threonine (HThr), aspartic acid (H2Asp), glutamic acid (H2Glu ...
Joel De Abreu, Edgar del Carpio, Waleska Madden, G. Lubes, M. L. Araujo, V. Lubes, Lino Hernández   +6 more
semanticscholar   +1 more source

THE CRYSTAL STRUCTURE OF PICOLINIC ACID

Chemistry Letters, 1973
Abstract The crystal structure of picolinic acid was determined by a three-dimensional X-ray analysis. The molecules are linked by two symmetric double minimum hydrogen bonds with a small potential barrier, N–H–N and O–H–O,and form a zig-zag chain.
ShimadaAkira, TakusagawaFusao
openaire   +2 more sources

Transition-metal-free decarboxylative halogenation of 2-picolinic acids with dihalomethane under oxygen conditions

Green Chemistry, 2019
The reaction of 2-picolinic acids with dihalomethane proceeded smoothly via N-chlorocarbene intermediates to afford 2-halogen-substituted pyridines in satisfactory to excellent yields under oxygen conditions.
Xitao Zhang, Xiujuan Feng, Haixia Zhang, Yoshinori Yamamoto, M. Bao   +4 more
semanticscholar   +1 more source

Transition-Metal-Free Decarboxylative Arylation of 2-Picolinic Acids with Arenes under Air Conditions.

Organic Letters, 2018
A facile, transition-metal-free, and direct decarboxylative arylation of 2-picolinic acids with simple arenes is described. The oxidative decarboxylative arylation of 2-picolinic acids with arenes proceeds readily via N-chloro carbene intermediates to ...
Xitao Zhang, Xiujuan Feng, Chuancheng Zhou, Xiaoqiang Yu, Yoshinori Yamamoto, M. Bao   +5 more
semanticscholar   +1 more source

Investigation of Picolinic Acid Extraction by Trioctylamine

International Journal of Chemical Reactor Engineering, 2011
Picolinic acid is a pyridine compound with a carboxyl side chain at the 2-position. It is an isomer of nicotinic acid, which has the carboxyl side chain at the 3-position. Picolinic acid acts as a chelating agent of elements such as chromium, zinc, manganese, copper, iron, and molybdenum in the human body.
Amaç Fatih Tuyun, Hasan Uslu
openaire   +2 more sources

Synthesis of 3-Substituted 2-Arylpyridines via Cu/Pd-Catalyzed Decarboxylative Cross-Coupling of Picolinic Acids with (Hetero)Aryl Halides.

Journal of Organic Chemistry, 2017
A decarboxylative cross-coupling of 3-substituted picolinic acids with (hetero)aryl halides is presented. In the presence of catalytic Cu2O and Pd(1,5-cyclooctadiene)Cl2 with 2-dicyclohexylphosphino-2'-(N,N-dimethylamino)biphenyl as the ligand, both ...
D. Hackenberger, P. Weber, D. Blakemore, L. Goossen   +3 more
semanticscholar   +1 more source

Binary and ternary nickel (II) complexes with picolinic acid and several amino acids

, 2020
In this work, we present the results from a chemical speciation study of binary and ternary complexes formed by Ni(II) ion with picolinic acid and the amino acids = Arginine (HArg), Tryptophan (HTrp), Asparagine (HAsn), Glutamine (HGln), Lysine (HLys ...
A. Paz, I. Caceres, Y. Fakhri, Y. Henríquez, M. L. Araujo, V. Lubes, Lino Hernández   +6 more
semanticscholar   +1 more source