ChemInform Abstract The title compounds are prepared from the corresponding chlorides or BBr3 and CF3SO3H, isolated in pure form and fully characterized (elemental analysis, mol. wt., NMR and IR spectroscopy) (no yields given). B triflate is a monomeric, relatively volatile compound, whereas Al and Ga triflate are associated, high-melting solids. All three triflates are efficient new Friedel-Crafts catalysts as shown in alkylation, isomerization, and acylation reactions. Alkylation of benzene and toluene with alkyl halides (alkyl: Me, Et, iPr, tBu; halide: F, Br, Cl) are carried out with the triflates as catalyst in CH2Cl2 and MeNO2 at room temperature. Substrate and positional selectivity (isomer distribution) are determined by GLC. B triflate shows the highest catalytic activity followed by Ga and Al triflate as reflected by overall yields in the alkylation reactions and tendency of accompanying isomerization, causing substantially increased meta substitution and disproportionation.

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An efficient natural-based catalyst constructed of volcanic pumice, cellulose polymeric chains, and palladium nanoparticles is presented for Suzuki–Miyaura coupling reaction.

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A new metal–organic framework with a three-dimensional (3D) nanoporous structure was formed from the self-assembly of 2,5-thiophenedicarboxylic acid (H2TDC) with Mn­(NO3)2·4H2O in dimethylacetamide (DMA). It crysallizes in the monoclinic crystal system with the space group C2/c and 1D channels in the b axis direction with the chemical formula of [Mn4(TDC)4(DMA)3(H2O)2] n (MUT-5). The synthesis of MUT-5 by three methods was performed by optimizing reaction conditions such as the reaction time and temperature, and their effects on the morphology and yield of the products were investigated. The physicochemical properties and crystalline structure were characterized by single-crystal X-ray crystallography, powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA), field emission scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FT-IR), and N2 adsorption/desorption. The results revealed that the utilization of sonochemical method gives sufficient yield with enhanced properties such as uniform particles of less than 100 nm, a higher surface area, and better capacity in nitrogen capture (82.6 cm3 g–1 at 77 K and 1 bar) relative to the other two methods. Moreover, due to the presence of electroactive sulfur heteroatoms and open metal coordination sites in the channels of MUT-5, it provides strong binding sites for CO2 adsorption of 1.14 mmol g–1 at 298 K and 1 bar, which is higher than the adsorption capacities of other famous MOFs. Thereby it is a promising match for carbon dioxide storage and capture.

Oxime ethers have attracted much attention due to their potential biological activities and wide variety of synthetic applications.