The antibacterial properties of sulfur containing flavonoids
摘要:
Some dithiocarbamic esters bearing a flavanone backbone, as well as their corresponding 1,3-dithiolium salts were tested against Staphylococcus aureus and Escherichia coli. The 1,3-dithiolium tricyclic flavonoids display good inhibitory properties against both Gram-positive and Gram-negative pathogens. (C) 2014 Elsevier Ltd. All rights reserved.
α-Acetylstyrylphosphonates were conveniently synthesized from 2-oxopropylphosphonates and substituted (dimorpholinomethyl)-benzenes (aminals). 4-Benzylidenemorpholinium carboxylates, generated from aminals by the action of α-halo acids, reacted with the phosphonates to give the products by elimination of the amine. The yields were influenced by the nature of substituents and their position in the phenyl ring and could be improved by adjustment of the acidities of the reacted acids. α-Acetylstyrylphosphonates containing various substituents on every position (at the 2-, 3-, or 4-position) in the phenyl ring were obtained generally in excellent yields using monochloroacetic acid.
A NEW PROTOCOL FOR THE PREPARATION OF AMINALS FROM AROMATIC ALDEHYDES AND THEIR FACILE CONVERSION TO PHOSPHONATES
作者:Mohammad Karimi Dezfuli、Mohammad Reza Saidi
DOI:10.1080/10426500490257078
日期:2004.1
A new and fast method for the preparation of aminals is reported from the reaction of aromaticaldehydes and secondary amines in the presence of potassium carbonate in high yields. The aminal can be converted to the corresponding iminum salt in reaction with acetyl chloride very easily and in very short time with high yield. Addition of trialkylphosphite, as one possible nucleophile, to the prepared
The Cytotoxic Properties of Some Tricyclic 1,3-Dithiolium Flavonoids
作者:Laura G. Sarbu、Sergiu Shova、Dragos Peptanariu、Isabela A. Sandu、Lucian M. Birsa、Lucian G. Bahrin
DOI:10.3390/molecules24132459
日期:——
needed. In this paper, we present the cytotoxic effects of five tricyclic flavonoids, one of which was previously identified as a potent antimicrobial agent. Methods: All five derivatives were tested against human HOS and MCF7 cancer cell lines using a wound scratch assay. The cytotoxic properties of previously reported flavonoid 4a were also evaluated using the standard MTS (3-(4,5-dimethylthiazol-2
The influence of halogen substituents on the biological properties of sulfur-containing flavonoids
作者:Lucian Gabriel Bahrin、Laura Gabriela Sarbu、Henning Hopf、Peter G. Jones、Cornelia Babii、Marius Stefan、Mihail Lucian Birsa
DOI:10.1016/j.bmc.2016.05.044
日期:2016.7
synthesized from the corresponding 3-dithiocarbamic flavanones. The influence of halogensubstituents on the antibacterial properties of the tricyclic flavonoids has been investigated against Staphylococcus aureus and Escherichia coli. On going from fluorine to iodine, these compounds exhibit good to excellent inhibitory properties against both Gram-positive and Gram-negative pathogens. These results suggest
Synthesis of 3-(aminomethyl)pyridine by traceless C3-selective umpolung of 1-amidopyridin-1-ium salts
作者:Pingsheng Tang、Dehai Xiao、Bo Wang
DOI:10.1039/c6cc09582h
日期:——
A natural product inspired rapid access of 3-(aminomethyl)pyridine by one-pot reaction of 1-amidopyridin-1-ium salt with aminal followed by reductive cleavage of the N-N bond is developed. This C3-selective formal C-H...