As a metal-free reagent, tert-butylnitrite (TBN) initiated aerobic sp3 C–H bond oxidation of glycine esters was achieved, providing a series of quinoline-2-carboxylates in good yields. The mechanistic investigation revealed that in the presence of molecular oxygen, TBN derived radicals were inv...
The free-radical addition of 2,3,4,6-tetra-O-acetyl-β-d-galactopyranosyl-(1→4)-2,3,6-tri-O-acetyl-1-thio-β-d-glucopyranose to the allyl ether functions of p-methoxyphenyl per-O-allyl-d-galactopyranoside, d-glucopyranoside, and lactoside provides a concise and effective route for synthesis of ...
Regioselectivity of acylation of 6-O-protected octyl β-d-glucopyranosides was investigated. Treatment of octyl 6-O-methyl-β-d-glucopyranoside with isobutyric anhydride in the presence of DMAP in toluene at −40 °C gave 3-O-isobutyryl derivative in >99% regioselectivity. Similar treatment of oc...
For the purpose of synthesis of naturally occurring β-d-glucopyranoside, direct β-glucosidation for the many kinds of functionalized primary alcohol in the presence of d-glucose using native or immobilized β-glucosidase (EC 3.2.1.21) from almonds under kinetically or equilibrium-controlled co...
Isofraxetin-6-O-β-d-glucopyranoside, identified from traditional medicinal herbal Xanthoceras sorbifolia Bunge, has been demonstrated to be a natural neuroinflammatory inhibitor. In order to obtain more derivatives with potential anti-neuroinflammatory effects, biotransformation was carried out...
A series of (2-(1-methyl-2,4-dioxo-1,2-dihydroquinazolin-3(4H)-yl) acetamido) acids) (6 a-m), (7) has been designed to inhibit the action of fungus chitin synthase enzyme (CHS). The synthesis of the designed compounds was carried out in four steps starting from the reaction between 1-methylquina...
Head roll tilt, postural imbalance and spontaneous nystagmus are the main static vestibular deficits observed after an acute unilateral vestibular loss (UVL). In the UVL cat model, these deficits are fully compensated over 6 weeks as the result of central vestibular compensation. N-Acetyl-dl-leu...
A novel 1,6-hexanediol diacrylate cross-linked resin was prepared that was subsequently functionalized by using chloromethyl methyl ether to afford a high-capacity resin. The resin exhibited good swelling and its application in the successful synthesis of a 13-residue peptide corresponding to th...
In this study, crosslinked sulfonated poly(ether ether ketone) (SPEEK) membranes were prepared using an EB-irradiation crosslinking method with various contents of a crosslinker mixture (1,4-butanediol divinyl ether (BDVE)/triallyl isocyanurate (TAIC), 9/1 wt. ratio) and applied as a proton exch...
A new Schiff base metal complex bis[(p-bromophenyl-salicylaldiminato)chloro]iron(III) [Cl(C13H9NOBr)2Fe] and its ligand (N-(4-bromo)-salicylaldimine) have been synthesized. The title complex and its ligand have been characterized by elemental analysis, IR technique, and UV–Vis spectroscopy. It ...
Titanium tetrachloride mediated dialkylation of methyl 4-p-bromophenyl-4-oxobutanoate ethylene ketals 2 by 1,8-bis(trimethylsilyl)-2,6-octadiene 1 (BISTRO) led to a mixture of methyl dl and meso-3-(1-p-bromophenyl-2,5-divinylcyclopentan-1-yl)-propanoates 3. Iodolactonisation, reduction with Bu3S...
The equilibrium solubility data of CO2 were measured in the various aqueous solutions of TIPA, TIPA+MEA and TIPA+Pz in various concentrations and temperatures ranging from 30 to 70 °C, and CO2 partial pressures below atmospheric pressure. They show that increasing the MEA/TIPA ratio and the add...
We cloned the Rhodococcus opacus (strain DSM 44193) tipA gene, which encodes two translation products, TipAL and TipAS. The gene products are homologous to the Streptomyces spp. TipAL and TipAS proteins, respectively. The tipA promoter is highly active and TipAS protein is predominantly accumula...
One of the hurdles in the discovery of antibiotics is the difficulty of linking antibacterial compounds to their cellular targets. Our laboratory has employed a genome-wide approach of over-expressing essential genes in order to identify cellular targets of antibacterial inhibitors. Our objectiv...
Managing processes remain a key challenge for most organizations which need to preserve competitiveness. Process assessment frameworks can help by providing instruments guiding process improvement and regulation alignment. Several process assessment frameworks such as TIPA® are based on the ISO ...
The study proposes a typology of the main pragmati≿ functions of the new Russian quotative marker tipa in discourse of young speakers. Based on the analysis of material from an Internet student forum, I present the communicative situations tipa is involved in as an algorithm which can unfold in ...
The oxidation of toluene (1), ethylbenzene (2) and cumene (3) with hydrogen peroxide, in the presence of several manganese(III) porphyrins with electron-withdrawing substituents, was studied using ammonium acetate as a co-catalyst. All products were characterised and their formation was justifie...
A toxicologic and dermatologic review of 1,1-dimethyl-2-phenylethyl acetate when used as a fragrance ingredient is presented. 1,1-Dimethyl-2-phenylethyl acetate is a member of the fragrance structural group Aryl Alkyl Alcohol Simple Acid Esters (AAASAE). The AAASAE fragrance ingredients are prep...
Methods for preparation of H-phosphonic acid and its diesters are described. The following reactions of H-phosphonic acid and its diesters are included in this chapter: Oxidation, reduction, addition to carbon–carbon multiple bonds and Schiff bases, Abramov reaction, Atherton–Todd reaction, Ka...
The pyrolysis of poly-(methyl methacrylate) (PMMA) has been studied in a pyrolysis plant provided with a conical spouted bed reactor. This reactor is an interesting technology for the pyrolysis of waste plastics due to its excellent hydrodynamic behaviour and its high heat transfer and versatili...
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