Results 81 to 90 of about 3,529 (194)

100 years of chemistry at Rhodes University [PDF]

open access: yes, 2004
The history of Grahamstown is well documented and two books deal with the history of Rhodes University.1,2 Although the Chemistry Department was one of the founding departments, coverage in the official histories is minimal and sometimes inaccurate or ...
Brown, M E   +4 more
core   +1 more source

Photoinduced Synthesis of New Diisochromenochromen-4-ones and Their Antimicrobial Activities [PDF]

open access: yes, 2012
The diisochromenochromen-4-one 3a-3b, 4a-4c, 5a-6a  & 7 have been prepared from the photocyclization reaction of bischromen-4-one 2a-2e. The later compounds are obtained from the O-alkylation of the suitable 3-hydroxy-2-aryl-4H-chromen-4-one 1a-1e with 4,
Jain, Payal   +2 more
core   +3 more sources

Photolytic release of bioactive carboxylic acids from fused pyran conjugates [PDF]

open access: yes, 2018
New ester cages bearing the coumarin (2H-benzopyran-2-one) skeleton with extended π-systems as phototriggers, for glycine and β-alanine, as models of carboxylic acid bifunctional molecules with biological relevance, were evaluated under photolysis ...
Conceição, Rafaela   +3 more
core   +1 more source

Derivados de cromano y sus usos como inhibidores de la actividad de las proteínas desacoplantes [PDF]

open access: yes, 2011
Derivados de cromano y sus usos como inhibidores de la actividad de las proteínas desacoplantes. Compuestos derivados del cromano, que presentan la fórmula general (I), donde R1 y R2, son iguales o diferentes entre sí, y están representados por un ...
Castellanos Santamaría, Esther   +3 more
core  

Annulation of phenols with methylbutenol over MOFs: The role of catalyst structure and acid strength in producing 2,2-dimethylbenzopyran derivatives [PDF]

open access: yes, 2015
The catalytic behavior of metal-organic frameworks of different structures (Fe(BTC), MIL-100(Fe), MIL-100(Cr) and Cu-3(BTC)(2)) was investigated in annulation reaction between 2-methyl-3-buten-2-ol and phenols differing in size (phenol, 2-naphthol).
Adrio   +65 more
core   +1 more source

Oxobenzo[f]benzopyrans as new fluorescent photolabile protecting groups for the carboxylic function [PDF]

open access: yes
The properties of three oxobenzo[f]benzopyrans as new fluorogenic photolabile protecting groups for the carboxylic function of amino acids were studied. Fluorescent amino acid conjugates were efficiently prepared and characterised.
Costa, Susana P. G.   +3 more
core   +1 more source

Synthesis of Pyranobenzopyrans [PDF]

open access: yes, 2017
Carbohydrates and their derivatives are involved in a wide array of biological processes and are crucial for the survival of living entities. As a result, sugar-based compounds have become attractive scaffolds for drug design.
Eltayeb, Sumiea B.
core   +1 more source

Studying of Pechmann Condensation Products of Ethyl Acetoacetate with 2,7-Dihydroxynaphthalene [PDF]

open access: yes, 2016
Two benzocoumarins and a benzochromone were synthesized starting from 2,7-dihydroxynaphthalene and ethyl acetoacetate in the presence of Amberlyst-15  as condensing agent.
AL-haj hussien, Fadia
core   +1 more source

Synthesis of 2-Prenylated Alkoxylated Benzopyrans by Horner-Wadsworth-Emmons Olefination with PPARα/γ Agonist Activity. [PDF]

open access: yesACS Med Chem Lett, 2021
García A   +10 more
europepmc   +1 more source

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