Non-stoichiometric manganese dioxide prepared electrochemically at room temperature and suspended in dilute sulphuric acid is used to oxidise isosafrole to piperonal in 54% isolated yield. The manganese dioxide-manganese(II) sulphate system can be recycled electrochemically at high current densi...

In this work, isomers of 2,4-dimethyl-3,5-bis(3,4-methylenedioxyphenyl)tetrahydrofuran (11) are presented as chemical markers formed during the peracid oxidation of isosafrole. The stereochemical configurations of the major and next most abundant diastereoisomer are presented. Also described is ...

A series of enantiopure aziridine carbinols were synthesized from commercially available starting materials (l-serine and piperonylaldehyde), and characterized by 1H NMR, 13C NMR, HRMS, and IR. Their enantioselective induction behaviors were evaluated as chiral ligands in the asymmetric addition...

Selective and efficient catalysts have been developed for the oxidation benzylic alcohols into the respective commercial aldehydes with air. Catalytically active metals (Pt and Pd) retained their activity when immobilized on the modified carbon carrier. To the best of our knowledge, this is the ...

Polymeric carbon nitride (C3N4) is a semiconductor material which is a very promising green photocatalyst with good physico-chemical properties and stability. It is a metal-free carbon based non-toxic material which can be easily obtained from earth-abundant components. The robustness and versat...

3,4-Methylenedioxybenzaldehyde [1-3-benzodioxole-5-carboxaldehyde or heliotropine (HEL)] is widely used in fragrance and pharmaceutical preparations. The synthesis of HEL by Oppenauer's oxidation of the corresponding 3,4-methylenedioxybenzyl alcohol [piperonyl alcohol (PA)] has been investi...

Zinc oxide (ZnO) prepared by chemical vapor deposition was combined with different amounts of carbon nanofibers (CNF) to obtain hybrid materials, which were thoroughly characterized using several techniques. The photocatalytic performance was evaluated towards the photocatalytic synthesis of van...

Pd/H-Beta catalysts with different silica-to-alumina ratio prepared by an impregnation method have been studied by XANES/EXAFS, IR, XRD and TEM. It was shown that palladium in calcined Pd/H-Beta samples exists as palladium oxide that can be easily reduced to Pd metal. The catalysts were tested i...

Inhibition of S. aureus diapophytoene desaturase (CrtN) could serve as an alternative approach for addressing the tricky antibiotic resistance by blocking the biosynthesis of carotenoid pigment which shields the bacterium from host oxidant killing. In this study, we designed and synthesized 44 d...

In this work, an eco-friendly process for piperonal synthesis from piperonyl alcohol oxidation was developed. Piperonal was obtained with 100% selectivity under solvent free conditions, using air as oxidant at atmospheric pressure. The preparation of high surface area CeO2 using a surfactant-tem...

The photocatalytic conversion of alcohols into the corresponding aldehydes constitutes an important reaction in organic synthesis. Optical semiconductors based on carbon nitride were prepared by thermal condensation of dicyandiamide followed by a thermal post-treatment (gCN-T) and further sonica...

A series of 4-aminoquinoline-piperonyl-pyrimidine hybrids were synthesized with the aim of identifying compounds with enhanced antimalarial activity. All the synthesized molecules were evaluated in vitro against cultured Plasmodium falciparum W2 and D6 strains and exhibited potent antiplasmodial...

The effect of para-toluene sulphonic acid (PTSA) on the corrosion of steels and nickel-based alloys in diethylene glycol dibenzoate (DEGDB) was investigated. Chromium is the major alloying element that reduces the corrosion rate. With increasing Ni content in metals, the rate increases. Mo alloy...

Today a variety of endocrine disrupting chemicals (EDCs) are recognized in the group of metabolic disruptors, a wide range of environmental contaminants that alter energy balance regulation by affecting the peroxisome proliferator-activated receptor (PPAR)/retinoid X receptor (RXR) pathway. Here...

A new Ca-complex (Ca (H2 O)4 (C12 H8 N2)2)(C7 H4 N S2)2 has been synthesized by the reaction of calcium chloride, sodium 2-mercaptobenzothiazole and 1,10-phenanthroline. The complex was characterized by using X-ray crystallography and FT-IR spectroscopy. The complex was tested against different ...

Hypertension is a lifestyle-related disease which often leads to serious conditions such as heart disease and cerebral hemorrhage. Angiotensin II (Ang II) plays an important role in regulating cardiovascular homeostasis. Consequently, antagonists that block the interaction of Ang II with its rec...

We report herein an original photoinduced electron transfer reaction between an aromatic aldehyde and TDAE in the presence of chloromethyl-dimethoxybenzenes. Thus, the reaction of 1-chloromethyl-2,5-dimethoxy-3,4,6-trimethylbenzene (1), dichlorides 4 and 5 with a series of aromatic aldehydes, in...

In our research, 14 benzyl benzoates with hydroxyl(s) (3–16) were synthesized and their inhibitory activity on mushroom tyrosinase was tested. Results indicated that among these compounds, 4-hydroxybenzyl 3,5-dihydroxybenzoate (3), 4-hydroxybenzyl 2,4-dihydroxybenzoate (5), 4-hydroxybenzyl 2,4,...

A sulfonated silica gel of small surface area with large pore diameters was prepared from the sodium silicate obtained from the reaction of construction sand and sodium carbonate, and sulfated with concentrated sulfuric acid. At 7%-w/w it promotes in 5 min the Fischer–Speier esterification of b...

Benzyl benzoate is used as an insecticide to kill scabies mites, dust mites, and ticks. It is also used as a plasticizer, a fixative in fragrances, a food additive, and a solvent. Dermatitis is the primary adverse reaction to its use as a topical solution. At high concentrations, it has been fou...