Myrcene, an important intermediate for the production of fine chemicals and pharmaceuticals, is mainly produced by the pyrolysis of β-pinene in the industry. The study of the direct pyrolysis of β-pinene was carried out without a catalyst and carrier gas at 573–873 K and under low pressure. I...
Biobased elastomer materials from renewable resources aimed at substitution of petroleum-based derivates for engineering application have recently become a growing research focus. Herein, we brought out the strategy to fabricate elastomer from biobased chemicals—myrcene, itaconic acid, ethanol ...
Ammonia toxicity is common and risk factor in aquaculture, deteriorating fish health. Phytochemicals might attenuate adverse effects of ammonia toxicity in fish. The present study aimed to investigate the effects of dietary myrcene and menthol administration on common carp (Cyprinus carpio) heal...
β-Myrcene is a flavoring substance that occurs naturally in a large variety of foods. At the request of the European Food Safety Authority (EFSA) for additional toxicological data on β-myrcene, groups of Sprague Dawley rats (10/sex/group) were administered diets containing 0, 700, 2100, or 420...
Echinococcus granulosus causes hydatidosis or cystic echinococcosis in humans and livestock. In humans, this disease can be managed with surgery, percutaneous treatment, chemotherapy and/or observation. The chemotherapeutic agents used and approved for treatment of hydatidosis are benzimidazoles...
With pressing environmental concerns and incessant depletion of fossil reserves, producing sustainable polymeric materials to become a research target. In this work, we prepare a bio-based polymer from a naturally occurring monoterpene (β-myrcene) and sulfur dioxide which can be captured from i...
In this paper water-swellable polyurethane urea gels composed of allyloxy containing blocks are described. They were synthesized by chain extension with ethylenediamine of a mixture of two isocyanate terminated prepolymers. The latter were made by reaction of 4,4′-diphenylmethane diisocyanate w...
Hydrosilylation has been carried out between Si–H terminated polydimethylsiloxanes with narrow molecular weight distribution and protected 3-allyloxy-1,2-propanediol, and after subsequently alcoholyzed, α-{3-[(2,3-dihydroxy)propoxy]propyl}-ω-butyl-polydimethylsiloxanes with varying number of ...
The chemisorption and electrocatalytic reactivity of 3,6-dihydroxypyridazine (DHPz) has been compared at smooth polycrystalline platinum and gold electrodes in aqueous acid and neutral solutions. Analytical measurements of packing densities and electrochemical reactivities were based upon thin-l...
One electron oxidation of the plant growth substance 3,6-dihydroxypyridazine (maleic hydrazide) gives a cyclic α-carbonylhydrazyl, the e.s.r. parameters of which are assigned by comparison with five related radicals.
The synthesis of pyrazines by the baker’s yeast-mediated reaction of β-keto-α-oximino esters and amides is described. Baker’s yeast reduced oximes selectively over ketones of β-keto-α-oximino esters to give the corresponding β-keto-α-amino ester intermediates, which underwent spontaneous...
Based on the electronic and Gibb’s free energy changes, the possibility of the formation of 2,5-dimethyl pyrazine (25Pz) as one of the probable final products in dihydroxyacetone (DHA) and glycine Maillard reaction under different pH conditions is described. Mechanisms for the reaction have bee...
2,5-Dimethyl-4-hydroxy-3(2H)-furanone (DMHF) is an aroma compound found in various foods, and used widely in the flavor and perfume industry. Dilute DMHF solutions exhibit a strawberry-like flavor while DMHF concentrates have a caramel-like aroma. DMHF is an important flavor compound contributin...
The reaction of multidentate pyrazine based ligands was explored towards Cp*rhodium and Cp*iridium precursors. Mononuclear and dinuclear complexes formed by the ratio-based reaction between ligand and metal precursor. The representative complexes have been determined by single crystal X-ray diff...
An expedient approach for the intermolecular C-H functionalization of pyrazines and other heteroarenes by the radical chemistry of xanthates is reported. Incorporation of a multitude of functional alkyl groups onto these heteroarenes proceeds in good yield and good to excellent regioselectivity,...
Pyrazines are key flavors in the development of roasted products such as coffee, cocoa, nuts or meat products. Their formation is closely related to the so-called Maillard reactions which involve the reaction between an α-dicarbonyl and an aminoacid group to yield an aminoketone which suffers f...
The generation of pyrazines in model systems containing enzymatically hydrolyzed whey protein under dry heating conditions was studied. Pyrazines are important Maillard flavor compounds. Hydrolysates, obtained with different peptidases (pepsine, chymosine, thermolysin and a non-specific peptidas...
A series of pyrazine-based linear and angular shaped push-pull chromophores were synthesized by Sonogashira reaction and were further investigated by X-ray analysis. The photophysical properties were comprehensively studied both experimentally and through quantum chemical methods. The drastic in...
Four pyrazines were synthesized as sex specific volatiles of female Korean apricot wasp, Eurytoma maslovskii. They are 2,5-dimethyl-3-vinylpyrazine (1), 2,5-dimethyl-3-(2-methylpropyl)pyrazine (2), 2,5-dimethyl-3-(2-methylbutyl)pyrazine (3), and 2,5-dimethyl-3-(3-methylbutylpyrazine (4). They we...
Poly (Evans blue) modified carbon paste electrode was prepared by electropolymerization method. The electrochemical determination of two major phenolic moieties namely catechol (CC) and hydroquinone (HQ) was performed at poly (Evans blue) modified carbon paste electrode (Evans blue/MCPE) by cycl...
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