The Erosion−Corrosion Inhibition of AISI 431 Martensitic Stainless Steel in 2.0 M H2SO4Solution UsingN-Alkyl Quaternary Ammonium Salts as Inhibitors

An effective protocol for quaternization of simple 1-aminoalkylphosphonic acids under basic conditions and using Me2SO4 as convenient alkylating agent is reported. In the course of reaction phosphonic acid quaternary ammonium...

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ChemInform Abstract: Enantioselective Michael Reaction of Nitroalkanes and Chalcones by Phase-Transfer Catalysis Using Chiral Quaternary Ammonium Salts.

ChemInform ◽

10.1002/chin.200207036 ◽

2010 ◽

Vol 33 (7) ◽

pp. no-no

Author(s):

Dae Young Kim ◽

Sun Chul Huh

Keyword(s):

Quaternary Ammonium ◽

Phase Transfer Catalysis ◽

Michael Reaction ◽

Phase Transfer ◽

Quaternary Ammonium Salts ◽

Ammonium Salts

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Green Accelerated Synthesis, Antimicrobial Activity and Seed Germination Test of Quaternary Ammonium Salts of 1,2-bis(4-pyridyl)ethane

Molecules ◽

10.3390/molecules24132424 ◽

2019 ◽

Vol 24 (13) ◽

pp. 2424 ◽

Cited By ~ 3

Author(s):

Tăbăcaru ◽

Botezatu ◽

Horincar ◽

Furdui ◽

Dinică

Keyword(s):

Escherichia Coli ◽

Triticum Aestivum ◽

Seed Germination ◽

Quaternary Ammonium ◽

Pathogenic Bacteria ◽

Classical Method ◽

Triticum Aestivum L ◽

Quaternary Ammonium Salts ◽

Ammonium Salts ◽

Radicle Growth

A family of fifteen quaternary ammonium salts (QAs), bearing the 1,2-bis(4-pyridyl)ethane core, were obtained using for the first time two different green methods, such as microwave (MW) and ultrasounds (US) irradiation, with very good yields and in much shorter times compared to the classical method, and an assay on their antimicrobial action against Escherichia coli (E. coli) was carried out. While 12 to 24 hours were required for complete alkylation of 1,2-bis(4-pyridyl)ethane by reactive halogenated derivatives in anhydrous solvent under reflux conditions, MW and US irradiation reduced the reaction time and the desired products were achieved in a few min. One of the aims of this study was to evaluate the antibacterial potential of the synthesized QAs against pathogenic bacteria, along with their impact on germination activity of wheat seeds (Triticum aestivum L.). The antibacterial activity of the QAs against Escherichia coli was explored by determining the minimum inhibitory concentration (MIC). The MIC values varied from 0.312 to 2.5 mg/mL, highlighting the lowest values attained for the derivatives containing methoxy, chlorine and benzofurane functional groups. The viability of aerobic bacteria was determined with the Tetrazolium/Formazan Test, a method that was found to be the best alternative approach with respect to the difuzimetric method. Seeds of Triticum aestivum L. were used for the evaluation of the germination indicators, such as seed germination (SG), the relative seed germination (RSG), the relative radicle growth (RRG), and the seed germination index (GI). The toxicity studies of QAs 1, 4 and 7, at two different concentrations, showed no inhibitory effect on seed germination.

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