Synthesis of novel benzofurocoumarin analogues and their anti-proliferative effect on human cancer cell lines

The synthesis of five new tetracyclic benzofurocoumarin (benzopsoralen) analogues is described. Their inhibitory effects on the growth of three human tumor cell lines (MDA MB 231 (breast adenocarcinoma), HeLa (cervix adenocarcinoma) and TCC-SUP (bladder transitional cell carcinoma) were evaluated, and discussed in terms of structure-activity relationship.

3-[1-(4-Methylphenylsulfonyl)-1,4-dihydropyridin-4-yl]-1H-indole

In the title compound, C₂₀H₁₈N₂O₂S, the indole mean plane and benzene ring form a dihedral angle of 65.0 (1)°. In the crystal structure, weak inter­molecular N—H⋯π and C—H⋯O inter­actions link the mol­ecules into ribbons propagated along [100].

NMR analysis of a series of substituted pyrazolo[3,4-d] pyrimidines-4-amines

A series of 21 substituted pyrazolo[3,4-d]pyrimidines-4-amines were studied by (1)H and (13)C NMR. The application of two-dimensional techniques, HMQC and HMBC, allowed the complete assignment of the spectra for all the compounds.

Synthesis of N-aryl-5-amino-4-cyanopyrazole derivatives as potent xanthine oxidase inhibitors

Some pyrazolo[3,4-d]pyrimidines, structurally related with allopurinol, a well known xanthine oxidase inhibitor, clinically used in the therapy of gout, have also been reported as potent inhibitors of xanthine oxidase and the growth of several human tumour cell lines. Considering the potential interest of this family of compounds, the aim of the present study was to synthesise and provide a full chemical characterization of new N-aryl-5-amino-4-cyanopyrazole derivatives and their corresponding pyrazolo[3,4-d]pyrimidines. Their biological activity pertaining to the xanthine oxidase inhibition and effect on the growth of three tumour cell lines (MCF-7, NCI-H460, and SF-268) are also provided. With only one exception, the synthesised compounds showed no effect on the growth of the three tumour cell lines. However, a strong xanthine oxidase inhibitory activity was observed for almost all pyrazolo[3,4-d]pyrimidines tested, revealing some of them IC(50) values below 1 microM. The results of the molecular docking studies of these compounds, against xanthine oxidoreductase are also described, providing an atomistic explanation of the differences in the inhibitory efficiency. MEP calculations were used to explain different inhibitory efficiency of similar inhibitors.

Synthesis and Antitumor Evaluation of Benzopsoralen Analogues

The synthesis of five new tetracyclic benzopsoralen analogues, compounds 2-6, with 9H-xanthen-9-one or 9H-carbazole frameworks, is described. Their inhibitory effects on the growth of three human tumor cell lines (MCF-7, SF-268, and NCI-460) were evaluated, and discussed in terms of structure-activity relationship, taking into account both geometric and electronic features. Generally, the angular compounds showed significant biological activities, but the arrangement of functional groups also contributed to the overall activity.

Psoralen analogues: synthesis, inhibitory activity of growth of human tumor cell lines and computational studies

Eight psoralens have been evaluated for their ability to inhibit the in vitro growth of three human tumor cell lines representing different tumor types, MCF-7 (breast cancer), NCI-H460 (non-small cell lung cancer) and SF-268 (CNS cancer). The synthesis of four new psoralens (benzofurocoumarins) is presented as well as the results of the ab initio calculations to find the parameters that relate the structure with the antitumor activity. This work provides supplementary information that could allow the development of new psoralen analogues with this type of biological activity.

Studies on 5-Bromo-4,7-dimethylindene, an Intermediate in the Synthesis of 6-Bromo-5,8-dimethylisoquinoline

We report the complete characterisation of all the precursors of 6-bromo-5,8-dimethylisoquinoline via the synthesis of Miller and Moock, and the synthesis of 6-bromo-4,7-dimethyl-2-(5′-Bromo-4’,7′-dimethyl)-2’,3′-dihydro-1' H-inden-1′-yl)-1 H-indene.