The ability of site I of human serum albumin (HSA) to bind medium sized molecules is important for the distribution, metabolism, and efficacy of many drugs. Herein, we show that this binding site has the ionization ability that may alter the drug structure during the process of its delivery. We reveal this ability by employing 2-(2'-hydroxyphenyl)benzoxazole (HBO) as a pH sensitive probe. Bindi...

CdO nanoparticles efficiently catalyzes the condensation of aromatic aldehydes with 2-aminophenol at room temperature to afford 2-aryl benzoxazole derivatives by grinding method. The reactions proceed under heterogeneous and mild conditions to provide 2-aryl benzoxazoles in excellent yields (87-97 %) with high purity under solvent free condition. The reaction requires short time (5-23 minutes) ...

Ten semi-synthetic analogs of A23187 (calcimycin), with only the benzoxazole ring substituents modified together with the ionophore X14885A were studied with regard to their calcium and magnesium carrier properties through an organic phase (toluene - butanol, 70:30). The results indicate that the carboxylic group and the oxazolic nitrogen, maintained in the ortho position are essential for the ...

A triptycene-based bis(benzoxazole) diacid ligand H(2)L2(Ph4) bearing sterically encumbering groups was synthesized. Treatment of H(2)L2(Ph4) with Fe(OTf)(3) afforded a C(2)-symmetric trinuclear iron(III) complex, [NaFe(3)(L2(Ph4))(2)(μ(3)-O)(μ-O(2)CCPh(3))(2)(H(2)O)(3)](OTf)(2) (8). The triiron core of this complex adopts the well known "basic iron acetate" structure where the heteroleptic car...

A general synthetic approach to two new series of methylenebisphosphonates: arylamino-2-ethane-1,1-diyl- and benzoxazole-2-methylenebisphosphonates is presented. Acid hydrolysis of selected BPs was undertaken to give the corresponding bisphosphonic acid (BP-acid). Next, the prediction of the permeability (hydrophobicity) of the target compounds was measured, by a combination of RP-HPLC and comp...

The design and research of luminescent volatile organic compound (VOC) fluorescent sensing materials are great significance challenge. We report herein the ligand substitution reaction VOC new heteroleptic [Cu(P ˄ P)N 2 ] + type copper(I) complexes. Firstly, three complexes 1 – 3 were designed by utilizing a chelate diphosphine 4,5‐bis(diphenylphosphino)‐9,9‐dimethylxanthene (Xantphos) synthesi...

Condensation of 1-(9-alkyl-9H-carbazol-3-yl)-4-carboxy-2-pyrrolidinones with 2,3-diaminonaphthalene or o-aminophenol was carried out by melting a reaction mixture at 170–230 °C and provided new 2-substituted naphtho[2,3-d]imidazole and benzoxazole derivatives. Derivatives of 2-substituted naphtho[2,3d]imidazole were alkylated with an excess of ethyl iodide in the presence of potassium hydroxide...

Near-infrared (NIR) emission can offer distinct advantages for biological applications. A fluorescent sensor, Zinhbo-1, based on bis(benzoxazole) ligand with 2,2'-dipicolylamine (DPA) as receptor, was synthesized. In aqueous solution, Zinhbo-1 demonstrates high sensitivity and selectivity for sensing Zn(2+) with about 10-fold enhancement and nanomolar sensitivity (K(d) = 0.29 nM). Moreover, sen...