The improved synthesis of metal (copper, nickel, zinc) 5,9,14,18,23,27,32,36- octabutoxynaphthalocyanines using modified microwave oven described. The comparison with conventional synthesis was made.

A fluorescent pyrenylmethyl moiety was coupled to the N-terminus of a series of catecholamines. The behaviour of the corresponding fluorescent conjugates towards photocleavage was evaluated by irradiation in MeOH/HEPES buffer (80:20) solution, in a photochemical reactor at different wavelengths (254, 300, 350 and 419 nm), followed by HPLC/UV monitoring.

We wish to report synthesis carbamates using Preyssler heteropolyacid, in absence of solvent and at room temperature, in green conditions.This synthesis was in mild conditions, ecofrienly and environmentally friendly, clean and with a easy work-up.

2-nitrobenzofuran is studied in Diels-Alder reactions under thermal conditions. A concise synthesis of dibenzofurans has been developed via cycloaddition reactions.

Flexible routes for the stereoselective synthesis of a variety of structurally diverse 1-, 3- or 4-alkyl and aryl-tetrahydrobenzo[c]azepines have been developed. The key steps are the highly diastereoselective 1,2-addition process or metallation/alkylation sequence applied to stereopure hydrazones. Subsequent cyclomethylenation or ringclosing metathesis reaction to secure the formation of the seven-membered azaheterocycle ring system complete the assembly of the targeted titled compounds.

The development of an unprecedented methodology based upon direct photolysis of N,N-disubstituted hydrazides to secure N-N bond cleavage and to trigger off the formation of NH free lactams has been disclosed.

A new homologous series of mesogen, 6-ethoxy-2-(4- alkanoyloxybenzylideneamino)benzothiazoles with even number of carbons (n = 6, 8, 10, 12, 14, 16, 18) at terminal ester chain have been successfully synthesized and isolated. The structure of the title compound was confirmed using elemental analysis and various spectroscopic techniques including FT-IR, 1H NMR and 13C NMR and EI-MS. Phase transition temperatures and thermal data were determined using differential scanning calorimetry. The textures of mesophases were observed under optical polarizing microscope attached with a Linkam hotstage. All the compounds are enantiotropic liquid crystals. While n-hexanoyloxy and n-octanoyloxy derivatives exhibited nematic, ndecanoyloxy to n-octadecanoyloxy derivatives showed smectic C and nematic phases.

With of reaction of 5-amino-pyrazole-4-carbonitrile derivative and using from supported Preyssler heteropolyacid catalyst in a series from reactions prepared a several new pyrazolo[3,4-d]pyrimidine, pyrazolo[3,4-e][1,4]diazepine, pyrazolo[3,4- d][1,2,3]triazine and pyrolo[4,3-e][1,2,4]triazolo[1,5-c]pyrimidine derivatives.

We wish to report reaction of various carbamates and oxazolidinones with carboxylic acid anhydrides in the presence of Wells-Dawson heteropolyacid catalysis. The N-acylation was carried out in presence heteropolyacid catalyst and gave the corresponding N-acyl products in good yields under solvent-free, green conditions. In this acylation used of Carboxylic acids and anhydride as acylating agents.

Cyano functionalized 6-methoxyquinolin-2-ones were synthesized from malonic acid derivatives and p-anisidines in multistep reactions via 4-chloro-6-methoxyquinolin-2-ones. Introduction of cyano substituents resulted in 3,4-dicyano-6-methoxyquinolin-2-ones or 4- cyano-6-methoxyquinolin-2-ones, depending on the substituents in position 3 and 1. The study of the fluorescence properties of 3,4-dicyano-6-methoxyquinolone showed emission values up to 550 nm (black curve) combined with large Stoke\'s shifts , whereas 4-cyano-6- methoxyquinolones gave lower values (e.g. blue curve) comparable to earlier findings.