The thiol groups of the vesicular protein of bovine adrenal medulla were allowed to react with the bifunctional thiol reagent bis-(N-maleimidomethyl) ether and with the monofunctional thiol reagent N-ethylmaleimide, and the ATP-dependent and -independent catecholamine fluxes of the modified preparations were studied. 1. During the initial phase of the reaction bis-(N-maleimidomethyl) ether bloc...

New S-substituted 4-alkyl-5-((3-(pyridin-4-yl)-1H-1,2,4-triazole-5-yl)thio)methyl)-4H-1,2,4-triazole-3-thiol derivatives have been designed, synthesized and studied their antimicrobial activity on 11 standard Gram-positive Gram-negative microorganism strains. Their spectral physicochemical parameters were established using modern comprehensive methods of analysis, including 1 H NMR spectroscopy...

A series of per-O-benzoylated 5-beta-D-glucopyranosyl-2-substituted-1,3,4-oxadiazoles was prepared by acylation of the corresponding 5-(beta-D-glucopyranosyl)tetrazole. As an alternative, oxidation of 2,6-anhydro-aldose benzoylhydrazones by iodobenzene I,I-diacetate afforded the same oxadiazoles. 1,3-Dipolar cycloaddition of nitrile oxides to per-O-benzoylated beta-D-glucopyranosyl cyanide gave...

Two classes of addition/cycloaddition cascade reactions of hydrazinecarbodithioate (1) have been developed under mild reaction conditions. Reaction of hydrazinecarbodithioate (1) with formaldehyde solution (2) and propiolic acid (3) gives 3-propargyl-5-thiol-2,3-dihydro-1,3,4-thiadiazoles (5) via a decarboxylative coupling/cycloaddition domino sequence. When propiolic acid (3) is switched to ph...

An easy and efficient method to obtain Schiff bases of [2-(2-substituted-phenyl)-3-(4-{1-[2-(1Htetrazol-5-yl)-biphenyl-4-ylmethyl])-1H benzoimidazol-2-yl}-phenyl)thiazolidin-4-one] using different aromatic aldehydes. Reaction mixture of Schiff base (0.01 mol) and mercaptoacetic acid (0.05 mol) dissolved in dioxane (50 ml), anhydrous zinc chloride (0.008 mol) was added and refluxed for 12 hrs. T...

Mukesh C. Sharma Dept. of Pharmaceutical Sciences, Dr.Hari Singh Gour University Sagar (M.P) 470003 India Department of Chemistry Yadhunath Mahavidyalya Bhind (M.P) 477001 India Email: [email protected] Abstract In this study we have synthesized some Benzimidazole derivatives (2-{6Chloro-5-nitro-1-[2-(1H-tetrazol-5-yl) biphenyl-4-ylmethyl] 1Hbenzoimidazol-2-yl}-phenyl)-(Substituted-benzyl...

A 405 nm light-activatable terthiophene-based tetrazole was designed that reacts with a fumarate dipolarophile with the second-order rate constant k2 exceeding 10(3) M(-1) s(-1). The utility of this laser-activatable tetrazole in imaging microtubules in a spatiotemporally controlled manner in live cells was demonstrated.

Several novel methods for reliably carrying out the oligonucleotide synthesis via the phosphoramidite strategy have been developed. The first is the method using allyloxycarbonyl and allyl groups for the protection of nucleoside bases and internucleotide linkages, respectively. These protectors can be cleanly removed under almost neutral conditions with a mixture of an organic Pd(0) complex suc...