Results 11 to 20 of about 197,331 (314)

Multifunctional Aromatic Carboxylic Acids as Versatile Building Blocks for Hydrothermal Design of Coordination Polymers

open access: yesCrystals, 2018
Selected recent examples of coordination polymers (CPs) or metal-organic frameworks (MOFs) constructed from different multifunctional carboxylic acids with phenyl-pyridine or biphenyl cores have been discussed.
Jinzhong Gu   +5 more
doaj   +2 more sources

5-Chloroisoxazoles: A Versatile Starting Material for the Preparation of Amides, Anhydrides, Esters, and Thioesters of 2H-Azirine-2-carboxylic Acids

open access: yesMolecules, 2022
Amides, anhydrides, esters, and thioesters of 2H-azirine-2-carboxylic acids were prepared by a rapid procedure at room temperature involving FeCl2-catalyzed isomerization of 5-chloroisoxazoles to 2H-azirine-2-carbonyl chlorides, followed by reaction with
Anastasiya V. Agafonova   +2 more
doaj   +1 more source

3-tert-butoxycarbonylamino-pyridine-2-carboxylic Acid [PDF]

open access: yesMolbank, 2007
To the carbamic acid tert-butylester 1 (1.03 g, 4.08 mmol) in methanol (15 ml) was added 1.4 equivalents of NaOH (2N).[...]
Rachid Mamouni   +2 more
openaire   +1 more source

Effects of solvent and structure on the reactivity of 6-substituted nicotinic acids with diazodiphenylmethane in aprotic solvents [PDF]

open access: yesJournal of the Serbian Chemical Society, 2009
The rate constants for the reactions of diazodiphenylmethane (DDM) with 6-substituted nicotinic acids in aprotic solvents at 30°C were determined. The obtained second order rate constants in aprotic solvents, together with literature data for benzoic and
Drmanić Saša Ž.   +2 more
doaj   +3 more sources

Facile Synthesis of Some Novel Pyrido[3', 2': 4, 5]thieno[2,3-b][1,4]thiazine-8-carboxylic Acids

open access: yesMolecules, 2007
Model tetrahydropyrido[3',2':4,5]thieno[2,3-b][1,4]thiazines 9a-c were synthesized via reductive lactamization, using sodium dithionite, of the respective 2-[(carboxyalkyl)thio]-3-nitro-4,7-dihydrothieno[2,3-b]pyridine-5-carboxylic acids 7a-c. The latter
Salim S Sabri   +4 more
doaj   +1 more source

Rapid and Simultaneous Determination of Free Aromatic Carboxylic Acids and Phenols in Commercial Juices by GC-MS after Ethyl Chloroformate Derivatization

open access: yesSeparations, 2021
Natural phenol and phenolic acids are widely distributed in the plant kingdom and the major dietary sources include fruits and beverages derived therefrom.
Alessio Incocciati   +4 more
doaj   +1 more source

Iron-Catalyzed, Highly Regioselective Synthesis of alpha-Aryl Carboxylic Acids from Styrene Derivatives and CO2 [PDF]

open access: yes, 2012
The iron-catalyzed hydrocarboxylation of aryl alkenes has been developed using a highly active bench-stable iron(II) precatalyst to give alpha-aryl carboxylic acids in excellent yields and with near-perfect regioselectivity. Using just 1 mol % FeCl2, bis(
Greenhalgh, Mark D., Thomas, Stephen P.
core   +1 more source

A Simple Method for Synthesis of Active Esters of Isonicotinic and Picolinic Acids

open access: yesMolecules, 2001
A method for preparation of the p-nitrophenyl-, N-hydroxysuccinimidyl- and pentafluorophenyl esters of isonicotinic and picolinic acids from the corresponding acids is reported.
Jørn B. Christensen
doaj   +1 more source

Bis(pyridine-3-carboxylic acid-κN)silver(I) perchlorate [PDF]

open access: yesActa Crystallographica Section E Structure Reports Online, 2009
In the title compound, [Ag(C(6)H(5)NO(2))(2)]ClO(4), the Ag(I) atom shows an almost linear coordination geometry, defined by two N atoms from two pyridine-3-carboxylic acid ligands. The complex cations are linked by hydrogen bonds between the carboxyl groups into a chain.
Nie, Xiao-Yan, Li, Qian-Zhu
openaire   +2 more sources

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

open access: yesInorganic Chemistry, 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·2 nH2O (3), and [Co3(μ5-dppa)2(μ-4,4'-bipy)(H2O)2] n·4 nH2O (4), have been generated under hydrothermal conditions ...
Jinzhong Gu   +6 more
semanticscholar   +1 more source

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