The O-phthalimidomethyl trichloroacetimidate (1), as a latent aminomethylating agent, exhibits high electrophilicity towards a variety of C-nucleophiles in the presence of catalytic amounts of TMSOTf and mild reaction conditions. The nucleophiles include aromatics, alkenes and active methylene c...

A series of co-crystals containing substituted 2-aminopyrimidines (2AP) with different dicarboxylic acids have been synthesized and their interactive modes have been characterized by single crystal X-ray studies. For this purpose three complexes containing 2-amino-4,6-dimethylpyrimidine and tere...

The carboxylic acid-functionalized cadmium sulfide/graphitic carbon nitride (CdS-TGA/g-C3N4) isotype heterojunction was prepared by thermal copolymerization of CdS-TGA/urea, which was formed via the interaction between COO− groups on CdS-TGA NPs and -NH2/-NH groups on urea. It was proposed that ...

Reaction of the title azomethinimine (1) with nitrogen dioxide gives nitric oxide, hexafluoroacetone and 3,3-dimethyl-5,5-bis(trifluoromethyl)-1-pyrazoline (2) in high yield, while with the perfluoronitrosoalkanes RFNO (RF  CF3 and CF2CF2CF3) the products are hexafluoroacetone and the azimines...

The goal of this article is to introduce the 6As model of social content management. The paper argues that in order for business managers to deal with social media resources effectively, they need an active and comprehensive approach using a guiding framework. This manuscript summarizes such a f...

The substrate specificities of alcohol dehydrogenases (ADH) are of continuing interest for understanding the physiological functions of these enzymes. Ser-48 and Phe-93 have been identified as important residues in the substrate binding sites of ADHs, but more comprehensive structural and kineti...

We computed the optimized structure of sequential 18-mer copolypeptide H-(Ala-Gly)9-OH (C45H74N18O19) adopting an right-handed α-helix (αR-helix) conformation with the basis set of DFT/6-31G(d), and then calculated the nuclear shieldings of the optimized structure with the basis set of DFT/6-3...

The dipeptide alanylphenylalanine (H-Ala-Phe-OH), its hydrochloride (HCl × H-Ala-Phe-OH) and Au(III)-complex have been characterized structurally. Quantum chemical DFT and ab initio calculations, solid-state linear-dichroic infrared (IR-LD) spectroscopy and 1H and 13C NMR data were employed. Th...

Self-assembled peptide nanotubes (PNT) are unique nanoscale objects having a great potential for a multitude of applications. We report the congeneric studies on local piezoelectric properties of H-β-(2-Pyridyl)-Ala-OH. It crystallizes in needle shaped microcrystals of the size from the fractio...

Five new caffeoyl cyclobutantetraol esters (1–5) and one hydroxycinnamoyl cyclobutantetraol ester (6), were isolated from Scindapsus officinalis (Roxb.) Schott, which were the first reported phenolic metabolites incorporating a cyclobutantetraol in nature. Structures of the isolated compounds, ...

A one-pot preparation of t-butyl esters and ethers is described that proceeds from the carboxylic acid or alcohol and t-butanol using only anhydrous magnesium sulfate and catalytic sulfuric acid as additional reagents. The method affords t-butyl esters and ethers in good yields and is applicable...

In this work, we present several new poly(ester imide)s (PEsIs) with low coefficients of thermal expansion (CTE), excellent optical transparency, very high heat resistance (Tg), film ductility, and solution-processability. Symmetric and asymmetric spiro-type tetracarboxylic dianhydrides containi...

The conversion of β-amido esters to β-enamino esters is an indispensable step for some synthetic approaches to alkaloids and related medicines. Known methods for such transformation are not only stepwise, but also proceed with low atom-efficiency. Herein, we report a direct and versatile appro...

A mild and efficient copper-mediated trifluoromethylthiolation of acid chlorides using (bpy)CuSCF3 has been developed. A wide range of S-trifluoromethyl esters were synthesized in good to excellent yields and various functional groups, including cyano, ether, ester, halide, nitro, et al. were we...

As a promising absorbent, ionic liquid (IL) was first used for capturing the volatile ester compounds from gas mixture. Considering the solubility of ester in IL and the selectivity of ester to feeding gas, the hydrophobic IL [BMIM][Tf2N] was selected. In combination with the quantum chemistry c...

Direct pyrolysis mass spectrometry findings revealed that thermal decompositions of poly(n-butyl methacrylate), PnBMA, poly(n-butyl acrylate), PnBA, and poly(t-butyl acrylate), PtBA, follow different decomposition pathways. Among these polymers thermal degradation via depolymerization is only ma...

Esters constitute an important class of aroma compounds and contribute significantly to the aroma of yeast-fermented beverages. Ester formation is well studied in Saccharomyces cerevisiae, while production of aroma compounds by non-conventional yeasts has received little attention. The selection...

Treatment of various N-methyl-N-(2-bromoaryl)arenesulfonamides (1a–g, 1i, and 1m) with 1,1,2,2-tetraphenyldisilane and AIBN under heating conditions gave the corresponding biaryl products (2a–g, 2i, and 2m) in moderate yields through the intramolecular radical ipso-substitution. However, N–H ...

Procedures are given for the preparation of (1-14C),(5,8-3H)tetralin,(2-14C),(5,8-3H)tetralin, (1-14C),(7-3H)decalin and (2-14C),(7-3H)decalin. Tetralin labeled with 14C in the aromatic ring was prepared from tetralol labeled with 14C in the aliphatic ring by conversion to naphthol and selective...

A spectroscopic investigation into the reaction of sodium tetrathionate with cysteine at pH 5 both at the boil and at room temperature has been carried out. The Raman and infrared spectra of the model compounds cysteine, cysteine-S-sulfonate, cysteine-S-thiosulfonate, sodium thiosulfate and sodi...