Results 81 to 90 of about 18,349 (284)

Supramolecular synthon hierarchy in sulfonamide cocrystals with syn-amides and N-oxides

open access: yesIUCrJ, 2019
Sulfonamide drugs are well known antibacterial and antimicrobial molecules for pharmaceutical development. Building a library of suitable supramolecular synthons for the sulfonamide functional group and understanding their crystal structures with partner
Geetha Bolla, Ashwini Nangia
doaj   +1 more source

Symmetry of Pyridine Derivatives Controlled Two-Dimensional Nanostructural Diversity by Co-Assembly with Aromatic Carboxylic Acids [PDF]

open access: yes
The self-assembly behaviors of aromatic carboxylic acids are commonly investigated at the liquid/solid interfaces because of their rigid skeletons and both hydrogen-bond donors and receptors. However, self-assemblies of aromatic carboxylic acids with low
Yutuo Zheng (18141843)   +4 more
core   +1 more source

Hydrogenations without Hydrogen: Titania Photocatalyzed Reductions of Maleimides and Aldehydes [PDF]

open access: yes, 2014
A mild procedure for the reduction of electron-deficient alkenes and carbonyl compounds is described. UVA irradiations of substituted maleimides with dispersions of titania (Aeroxide P25) in methanol/acetonitrile (1:9) solvent under dry anoxic conditions
John C. Walton   +9 more
core   +1 more source

Doebner-type pyrazolopyridine carboxylic acids in an Ugi four-component reaction

open access: yesBeilstein Journal of Organic Chemistry, 2019
Substituted 1H-pyrazolo[3,4-b]pyridine-4- and 1H-pyrazolo[3,4-b]pyridine-6-carboxamides have been synthetized through a Doebner–Ugi multicomponent reaction sequence in a convergent and versatile manner using diversity generation strategies: combination ...
Maryna V. Murlykina   +11 more
doaj   +1 more source

Synthesis of amides from carboxylic acids and urea in the presence of pyridine under microwave irradiation [PDF]

open access: yes, 2005
A very simple and efficient procedure for the synthesis of primary amides from carboxylic acids and urea in presence of pyridine under microwave irradiation is described.
Pasha, M.A., Jayashankara, V.P.
core  

Silver-Catalyzed Decarboxylative Radical Azidation of Aliphatic Carboxylic Acids in Aqueous Solution [PDF]

open access: yes, 2015
We report herein an efficient and general method for the decarboxylative azidation of aliphatic carboxylic acids. Thus, with AgNO3 as the catalyst and K2S2O8 as the oxidant, the reactions of various aliphatic carboxylic acids with tosyl azide or pyridine-
Chao Liu (1234536)   +4 more
core   +1 more source

Salts and Co-Crystalline Assemblies of Tetra(4-Pyridyl)Ethylene with Di-Carboxylic Acids

open access: yesCrystals, 2018
Tetraarylethylene derivatives are emerging as an increasingly important family of supramolecular building blocks in both solution phase and the solid state. The utility of tetraarylethylenes stems from appealing structural features (rigidity and symmetry)
Moustafa T. Gabr, F. Christopher Pigge
doaj   +1 more source

Complicated Composting: Persistent Pyridine Carboxylic Acid Herbicides [PDF]

open access: yes, 2013
This paper reviews pyridine carboxylic acid herbicide impacts on compost. Pyridine carboxylic acid herbicides are not completely broken down during grass growth, harvest and drying of hay, in the digestive tract of livestock, or during composting.
Reimer, Julie
core  

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

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

open access: yesScientific 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   +7 more
doaj   +1 more source

Home - About - Disclaimer - Privacy