A toxicologic and dermatologic review of cyclopentanone when used as a fragrance ingredient is presented. Cyclopentanone is a member of the fragrance structural group ketones cyclopentanones and cyclopentanones. The common characteristic structural element of the group members is a cyclopentanon...

Racemic α-monosubstituted cyclopentanones were converted to optically active forms by a thermodynamically controlled deracemization using TADDOL-type host molecule 1 in alkaline aqueous MeOH. The efficiency of this conversion was strongly influenced by the ratio of the solvent components (H2O/M...

Cyclopentanone, a product of biomass pyrolysis of agricultural waste, has certain advantages as a biofuel candidate but so far little is known about its combustion characteristics. In this paper, the laminar flame characteristics of cyclopentanone, including stretched flame propagation speed, un...

A new route was developed for the synthesis of renewable decalin with cyclopentanone which can be derived from lignocellulose. It was found that 1,2,3,4,5,6,7,8-octahydronaphthalene could be selectively produced by the hydrogenation/dehydration/rearrangement of [1,1′-bi(cyclopentylidene)]-2-one...

Herein, a series of Pd nanoparticles supported on Cu-MOFs (Cu3(BTC)2, FeCu-DMC) with pure Lewis acidity are synthesized for hydrogenative ring-rearrangement reaction of furanic aldehydes (furfural, 5-hydroxymethyl furfural) to cyclopentanone compounds (cyclopentanone, 3-hydroxymethyl cyclopentan...

Water is ubiquitous in many catalytic reactions used in the upgrading of biomass. Therefore, quantifying and controlling the influence of water in activity, selectivity, and catalyst deactivation is essential for advancing this technology. Here, we report a kinetic study of the cyclopentanone se...

The ignition delay times of cyclopentanone in air were measured using a high pressure shock tube (HPST) and a rapid compression machine (RCM) over the temperature range of 794–1368 K at P = 15 and 30 bar and at equivalence ratios of 0.5, 1.0 and 2.0. To provide more insight into the oxidation o...

This work reports thermal decomposition of cyclopentanone behind reflected shock waves over 1150 – 1590 K and 750 – 1800 Torr. Carbon monoxide is one of the main reaction products and its formation was monitored using a quantum cascade laser operating near 4.56 µm. Our results show that cyclo...

Polymers with parabanic units in the macromolecular chain were prepared by intermolecular reaction between various polyureas and oxalyl chloride. The influence of polymer structure on the heterocyclization process and on the properties of the resulting polymers are discussed. All polymers were c...

Convolution potential sweep voltammetry has been applied to the electrochemical reduction of parabanic acid in the 10–100 V/s scan rate range. The overall reduction corresponds to a quasireversible two-electron, two-proton transfer to give an enediol intermediate compound. This compound undergo...

Some poly(parabanic acids) were synthesized by intermolecular reaction between the urea group from polyureas and oxalyl chloride in the presence of pyridine as catalyst. All the synthesized polyureas and poly(parabanic acids) were characterized by thermogravimetric, i.r. and elemental analysis.

Parabanic acid reduction has been studied in the − 1.4 ⩽ H0 ⩽ 0.9 acidity range by the ac impedance technique. Changes in the adsorption of reactant and products with solution acidity lead to protonation equilibrium constants that differ from their bulk values. The observed pKa shifts were consi...

Although the application of high pressure to organic compounds may favour thermodynamically the adoption of a new polymorphic form, for compounds with high melting points there is often a substantial kinetic barrier to be overcome before the molecules can rearrange. Hence pressure-induced phase ...

The adsorption properties of parabanic acid (PBA) on Pt(111) electrodes are described. The process takes place with charge transfer at potentials higher than 0.175 V. The PBA adlayer is particularly stable against oxidation or CO adsorption but is desorbed upon hydrogen adsorption. Comparison be...

[(η5-C5H5)Fe(CO)2](Fp)-complexes of the parabanic acid mono- and dianion have been synthesised in a photochemical reaction of FpI with parabanic acid and diisopropylamine in benzene. The former contains a reactive N(3)–H bond and can be readily thallated with TlOEt. Reaction of the thallated c...

Thermophysical and thermochemical studies have been carried out for crystalline parabanic acid. The thermophysical study was made by differential scanning calorimetry, DSC, over the temperature interval between T = (263 and 473) K. Two phase transitions were found: at T = (392.3 ± 1.6) K with t...

Photodissociation experiments have been performed for the parabanic acid (C3H2N2O3) molecule in vapor phase using time-of-flight mass spectrometry and synchrotron radiation in the VUV photon energy range. Electron ion coincidence (PEPICO) spectra and partial ion yields have been recorded as a fu...

A convenient procedure for the preparation of various substituted (thio)hydantoins is described. The method is based on Wittig and aza-Wittig reactions of parabanic acids with phosphonium ylides. The reactions occurred both regio- and stereo-selectively.

Oleic acid (cis-9,10-octadecenoic acid) is the most abundant monounsaturated fatty acid in human blood. Peroxynitrite (ONOO−) is a short-lived species formed from the reaction of nitric oxide (NO) and superoxide (O2−). Peroxynitrite is a potent oxidizing and moderate nitrating agent. We investig...

Hydrocarbons in a range of the renewable gasoline chain-length were produced by oxidative cleavage of unsaturated fatty acid, oleic acid, followed by decarboxylation. The effects of the emulsifier, concentration of oxidizing agent, reaction temperature, and atmospheric conditions were investigat...