Glycosyl (iso) thioureas being an important intermediate in the synthesis of thioureido carbohydrates herein we reported the synthesis of per–O–acetyl lactosyl aryl isodithiobiuret derivatives. These compounds were synthesized by nucleophilic addition of per-O-acetyl lactosyl aryl isothiourea to tolyl isothiocyanate. Structures of these compounds were confirmed on the basis of IR, HNMR, Mass spectra and elemental analysis. These compounds were also screened for their in vitro antimicrobial activities against bacteria S. aureus, E. coli, P. vulgaris, P. aeruginosa and fungi A. niger, Penicillium.

The synthesis of two new symmetrical disazo direct dyes containing 4,4'-diaminostilbene-2,2'disulphonic acid as middle component and 3-chlorosalicylanilide and 4-chlorosalicylanilide as coupling components are presented. The synthesized dyes were analyzed by thin layer chromatography (TLC), electronic spectra (VIS) and HPLC technique. Their structures were elucidated by FT/IR and ¹³C-NMR spectroscopy. The CIELAB (1976) colour space was used in all the colour measurements for the two disazo stilbene dyes under the CIE recommended illuminants: D65 (natural day light), A (tungsten light), F2 (fluorescent light) and the standard 10° observer respectively. The colour difference (ΔEab*) was calculated against one standard

Condensation of pentaethylenehexamine and 3-bromo-5-chlorosalicylaldehyde yielded the bisimidazolidine Schiff base ligand 5,6\'-(1E,1\'E)-(2,2\'-(3,3\'-(ethane-1,2- diyl)bis(2-(3-bromo-5-chloro-2-hydroxyphenyl)imidazolidine-3,1-diyl))bis(ethane- 2,1-diyl))bis(azan-1-yl-1-ylidene)bis(methan-1-yl-1-ylidene)bis(2-bromo-4- chlorophenol), H₄L. This diimine could be suitably characterised both in the solid state and in solution.

Condensation of the selectively tosilated N-(2-aminobenzyl)-4-methylbenzenesulfonamide with 2-hydroxybenzaldehyde gives rise to (E)-N-(2-(2- hydroxybenzylideneamino)benzyl)-4-methylbenzenesulfonamide in the solid state, as the crystal structure determined shows, and which in solution shows equilibrium between the acyclic imine and 2-(3-tosyl-1,2,3,4-tetrahydroquinazolin-2-yl)phenol

Synthesis and characterization of new amphiphilic azobenzenes with non ionic character is presented. The synthetic methodology is simple and versatile which allows the generation of molecular diversity from the same precursors in an easy way.

0-N-Methylpurpuramine E has been successfully synthesized in 2 steps in good yield from readily available starting materials. Structural elucidation has been confirmed through direct comparison with spectroscopic data of isolated natural product.20-N-Methylpurpuramine E has been shown to have MIC = 5 μg mL^-1 against Mycobacterium bovis.

A novel rapid one-pot four-component reaction between resorcinol, aromatic aldehydes, malononitrile and ammonium acetate in aqueous media was performed under microwave irradiation for the synthesis of 1,4-dihydroquinoline derivatives. The main advantages of this method are the short reaction time, high yields, despite absence of any catalyst, and simple work-up.

Three new asymmetric Schiff base compounds, (E)-methyl 2-(2-(2-hydroxy-3-methoxybenzylideneamino)ethylamino)cyclopent-1-enecarbodithioate[H 2 cd3-OMesalen](1), (E)-methyl 2-(2-(3,5-di-tert-butyl-2-hydroxybenzylideneamino)ethylamino)cyclopent-1-enecarbodithioate[H 2 cd di tertbutsalen] (2) and (E)-methyl2-(2-(3-hydroxy-4-methoxybenzylideneamino)ethylamino)cyclopent-1-enecarbodithioate[H 2 cd4-OMesalen] (3) have been prepared. The compounds have been studied with IR, 1 H NMR, 13 C NMR and microanalysis. The crystal structure of (1) has been also determined.

The formation of complexes between alkaline cations and molecular bowls (MBs), curved conjugated systems related with fullerene (C 60 ), is studied using DFT calculations. The series of MBs is constructed starting with benzene and additional hexagonal or pentagonal rings are added symmetrically to complete the C 60 structure. All the MBs studied form stable cation–π complexes by both of its sides: concave and convex. In all cases complexes with the cation in the convex side are more stable than their corresponding partner inside the bowl. The stability of the complexes is determined by the polarizing power of the cation and by the molecular electrostatic potential and the polarizability of the bowl. Additionally, size effects are observed when bulky cations are placed in the concave side of the largest bowls.

A facile, one pot three-component procedure for the efficient synthesis of novel 2'-aminobenzimidazolomethylnaphtols derivatives was developed by the reaction of 2-aminobenzimidazole, 2- naphtol and aromatic aldehydes in the presence of L-proline under grinding and solvent free condition at room temperature.