A series of 3-deazapurine ribonucleosides 5a–5l bearing diverse C-substituents (alkyl, aryl and heteroaryl) in the position 6 were prepared by Pd-catalyzed cross-coupling reactions of either free 6-chloro-3-deazapurine ribonucleoside 4 or its acetyl protected congener 3 followed by deprotection. An improved synthesis of the starting 4-chloro-1-(2,3,5-tri-O-acetylβ-D-ribofuranosyl)-1H-imidazo[4,...

A new metal-free hydrohalogenation method for alkynes has been developed, which proceeds through a pseudo-intramolecular process. In this reaction, ethynylaniline serves as substrate to quantitatively form an anilinium salt upon treatment with hydrochloric acid. The spatial proximity facilitates the efficient electrophilic addition of HCl ethynyl group in syn-mode, affording corresponding chlor...

The title compound, C12H7Cl3O3S, was synthesized via a nucleophilic substitution reaction between phenol and 2,4,5-tri-chloro-benzene-sulfonyl chloride. The two aryl rings are oriented gauche to one another around the sulfonate S-O bond, with a C-S-O-C torsion angle of -70.68 (16)°, and the two rings are inclined to one another by 72.40 (7)°. In the crystal, mol-ecules are linked via various C-...

In this study, bimodal meso-porous silica (UVM-7) synthesized and fabricated amino silane modified supports were characterized by powder X-ray diffraction (XRD), N2 adsorption/desorption, transmission electron microscope (TEM), elemental analysis and titration. Capacity of CO2 capture on modified bimodal pore structure silica at 70°C was calculated using breakthrough curves; and it was found th...

Microwave assisted reactions have gained considerable attention, due to versatility and reduction ofsolvent and reaction time. The reaction of a nano-coconut shell and boron tri-fluoride in diethylether solvent resulted in preparation of nano-coconut shell-BF3 as a catalyst. The nano-coconutshell-BF3 catalyst has been characterized by fourier transform infrared spectroscopy (F...

This paper presents a new tri-dexel volumetric modeling method for representing complex geometric models in applications such as haptic virtual sculpting and product prototyping. A tri-dexel model consists of three overlapping dexel models in X, Y, and Z axis directions, respectively. Detailed algorithms of eliminating inconsistency in a tri-dexel model and reconstructing a water-tight polyhedr...

Electrochemical synthesis has been rapidly developing over the past few years. Here, we report a practical and eco-friendly electrocatalytic isomerization of allylic alcohols to their corresponding carbonyl compounds. This reaction can be carried out in undivided cells without addition external chemical oxidants metal catalysts. Moreover, this features broad substrate scope including challengin...

Zinc phthalocyanine (ZnPc) derivatives with asymmetric (Zn-tri-PcNc-2) or symmetric (Zn-tetrad-Nc) structure, which possess wide spectral response in the visible/near-IR light region, are synthesized and utilized as a sensitizer of graphitic carbon nitride (g-C3N4) with 0.5 wt% Pt-loading for photocatalytic H2 production. The experimental results indicate that Zn-tri-PcNc-2 exhibits much better...

A series of eight 3-oxapentane podand derivatives was successfully prepared based on the croton condensation reaction from 1,5-bis(aryl)-1,5-dithia-3-dioxadecane and 1,5-bis(aryl)-1,3,5-trioxadecane with bezaldehyde or acetophenone in acidic condition. These synthesized have structure acyclic crown rings inserted by polyether polythiaether chain vinyl ketone conjugated aryl group. Therefore, th...