Abstract The enthalpies of vaporization/sublimation 2-, 3- and 4-methyl-acetophenones 3-, 4-cyano-acetophenones were derived from the vapor pressure temperature dependence measured with help gas saturation method. Enthalpies fusion 4-methyl-acetophenone 4-cyano-acetophenone by using DSC. literature thermochemical data for methyl-, ethyl, cyano- acetoxy-substituted acetophenones new results eval...

a new carbazole- containing polymer has been synthesized for further photophysical studies. efficient synthesis of the substituted methyl methacrylate has been accomplished via microwave assisted synthesis of 1 - chloro - 4-carboxy -5,6, 7, 8- tetrahydrocarbazole followed by further steps, such as reduction of the 4-substituted methyl carboxylate, dechlorination of the ring and at last, the rea...

Abstract A detailed study of the ability pyridine-2,6-dicarboxylic acid (1) and its 4-mono- 3,4,5-tri-substituted analogues to sensitize emission from Pr3+, Nd3+, Gd3+, Dy3+ Er3+ is presented. Sensitization Ln3+ was demonstrated via ligands in all complexes, excluding with covering spectral range 500 nm 1850 nm obtained variation ion. From ligand-based photoluminescence Gd3+-complexes, relative...

Carbazole derivatives [1-6] have been reported to exhibit pharmacological properties like anti­ tumour, anticonvalsant, psychotropic, antiinflam­ matory, antihistamine and antibiotic properties. Oxazole derivatives [7-15] have been used as optical whitening agents, sensitizing dyes, photoreducing pigments, muscle relaxant and effective against wide range of enteric infections, appetite depressa...

An enantioselective chiral phosphoric acid catalyzed formal [4+2] cycloaddition between 2-benzothiazolimines and N-H-1,3-dienecarbamates is described. A divergence in reaction pathways was observed depending on the dienes employed. The performed with 4-substituted produced benzothiazolopyrimidines as major product yields ranging from 42 to 67%, single diastereoisomer enantioselectivity 93 99%. ...

The pyridazino[4,5-b]indole (3), which is conveniently available from 3-methylthioindole and the tetrazine (2), undergoes thermally induced inverseelectron-demand Diels-Alder reactions with enamines to afford the cycloalkeneannelated carbazoles (7,8) or the 2-substituted carbazole (9), respectively. We have previously shown that 1,2-diazines annelated to a second π-electron-deficient aromatic r...

Series of the 2-unsubstituted and 2-(4-chlorophenyl)-substituted 4-anilino-6-bromoquinazolines and their 6-(4-fluorophenyl)-substituted derivatives were evaluated for in vitro cytotoxicity against MCF-7 and HeLa cells. The 2-unsubstituted 4-anilino-6-bromoquinazolines lacked activity, whereas most of their 2-(4-chlorophenyl) substituted derivatives were found to exhibit significant cytotoxicity...

The title compound, C(21)H(13)NO(2), was prepared as an example of a new synthesis of carbazoles from a cyclic dibenzo-iodo-lium salt via a twofold Pd-catalysed aryl-ation of a primary amine. The two essentially planar π-subsystems [maximum deviations from the mean square plane of 0.038 (2) Å in the carbazole and 0.059 (2) Å in the coumarine unit] open a dihedral angle of 63.05 (4)°. Two mol-ec...

Detection of trace explosives is of great concern for homeland security, battlefield protection, and industrial and environmental safety control. Fluorescence quenching based sensing has proven to be one of the most promising approaches for trace explosives detection, for which various conjugated polymers, molecular imprinted polymers, dye doped silica and metal–organic frameworks have been fab...