Publisher SummaryThe dihydroxyalkanecarboxylic acids have the general formula, CnH2nO4, where the first member of the series is HOCH2.CH(OH).CO2H, known as glyceric acid, α,β-dihydroxypropionic acid, or 2,3-dihydroxypropanoic acid. Methods similar to those used for the preparation of monohydro...

A series of Cs salt of phosphotungstic acid (Cs-PTA) supported on MCM-41 (Cs-PTA/MCM-41) was synthesized by a wet impregnation method and thoroughly characterized by using various analytical techniques, viz. X-ray diffraction, UV–Vis diffused reflectance spectroscopy (UV–Vis DRS), nitrogen ads...

The present work describes a detailed investigation of the catalytic activity of Cesium salt of di-copper substituted phosphotungstate for the oxidation of styrene using tert-butyl hydroperoxide as the oxidant. Various parameters like time, catalyst amount, mole ratio of substrate to TBHP and te...

Hydroxybenzophenones are important precursors used in fine chemical and pharmaceutical industries. The esterification reaction of phenol with benzoic acid, followed by the Fries rearrangement towards hydroxybenzophenones in a one-pot liquid phase operation was examined with several catalysts und...

A series of insoluble cesium partly substituted Wells–Dawson type heteropolyacids, CsxH6−xP2W18O62 (x = 1.5–6.0), were synthesized and characterized using the techniques including UV–vis/DRS, FT-IR, XRD, XPS, and N2 porosimetry. As the unique and reusable solid acid catalysts, CsxH6−xP2W18O62...

Friedel–Crafts alkylation and acylation reactions are ubiquitous in several industries and use highly polluting liquid acids as catalysts. Production of ketones and subsequently secondary alcohols is achieved by Friedel Crafts acylation using various acylating agents. Benzophenone and its famil...

A highly efficient protocol for the palladium-catalyzed ortho-arylation of benzoic acid derivatives by aryl iodides is described with an aminoacetic acid based N,O bidentate directing group. This protocol can be applied to various benzoyl aminoacetic acids and aryl iodides with both electron-don...

SummarySoil salinity is destroying arable land and is considered to be one of the major threats to global food security in the 21st century. Therefore, the ability of naturally salt-tolerant halophyte plants to sequester large quantities of salt in external structures, such as epidermal bladder ...

Immoderate intake of nitrite (NO2−) is deleterious human health and may result in causing dangerous diseases. In this study, nitrite detection system was successfully fabricated based on a unique diazo-coupling reaction of p‑Aminobenzoic acid (PABA) and phloroglucinol (1, 3, 5‑trihydroxybenzene)...

The vibration (FT-IR, FT-Raman), electronic (UV–Vis) and NMR (1H and 13C) spectra for 3-aminobenzoic acid and its alkali metal salts were recorded. The influence of lithium, sodium, potassium, rubidium and cesium on the electronic system of the 3-aminobenzoic acid was studied. The assignment of...

Protonation constants of 2-aminobenzoic acid, (anthranilic acid, vitamin L1) (1), 4-aminobenzoic acid (PABA) (2), and 2-aminoterephthalic acid (3) have been obtained from potentiometric measurements at 25 °C (298.15 K) and ionic strengths between 0 and 5 mol ⋅ dm− 3 NaCl and between 0 and 3 mol...

For the first time, adhesive and nanostructure monolayer and bilayer coatings of poly(3-aminobenzoic acid) (PABA) and polyaniline (PANI) have been electrodeposited on 430 stainless steel (430SS) from oxalic acid 0.3 M solution by cyclic voltammetry in order to protect 430SS against corrosion. Th...

The ability to recognize weakly coordinating thiocyanate anion was studied using 3-aminobenzoic acid based ion pair receptor (1) consisting of thiourea and crown ether binding domains. UV–Vis and 1H NMR spectroscopic measurements carried out in acetonitrile showed that receptor 1, unlike its ur...

We have studied the effect of the substituent position in the ring, and lithium, sodium and potassium ions on the electronic structure of o-, m- and p-methoxybenzoic acids (anisic acids) by the use of FT-IR, FT-Raman, Ar matrix FT-IR and 1H NMR methods, and ab initio calculations at the B3LYP/6-...

The aluminum triiodide mediated chemoselective ester/ether C–O cleavage of methyl anisates was investigated. o-Anisate undergoes ether cleavage at low temperatures in carbon disulfide, cyclohexane and acetonitrile. Further cleavage of the ester group occurs at elevated temperatures to afford sa...

In this work we investigated relationship between molecular structure of alkali metal o-, m-, p-anisate molecules and their antimicrobial activity. For this purpose FT-IR spectra for lithium, sodium, potassium, rubidium and caesium anisates in solid state and solution were recorded, assigned and...

A strain of Pseudomonas fluorescens, designed CP30, was capable of co-metabolizing 3-chlorobenzoic acid via chlorocatechols, thus producing a polychlorocatechol black pigment. The pigment production was found to be enzyme-mediated in P. fluorescens cultures; however, the results of the autoxidat...

In this study, multistage contact oxidation reactor (MCOR) with a novel carrier was used for treatment of high-strength sodium saccharin wastewater (SSW) under stepwise increasing salinities from 1.0% to 8.0%. The results revealed that MCOR could effectively remove the organic pollutants from SS...

An anaerobic continuous-flow fixed-bed column reactor capable of degrading 3-chlorobenzoate (3-CBA) under denitrifying conditions was established, and its rate reached 2.26 mM d−1. The denitrifying population completely degraded 3-CBA when supplied at 0.1–0.54 mM, but its activity was partly su...

A mixed microbial culture degraded a mixture of benzoate (863 mg/L), 3-chlorobenzoate (3-CB) (69.7 mg/L), and pyruvate (244 mg/L) under denitrifying conditions in a chemostat. Biodegradation under denitrifying conditions was stable, complete (effluent concentrations below detection limits), and ...