Thiophene Compounds of Biological Interest

3-Thienyl/benzothienylchromones. Synthesis and properties

This mini-review for the first time summarizes and systematizes all the data available in the literature on the synthesis and properties of 3-thienyl/benzothienylchromones, starting from 1960. Two main approaches to the formation of target structures are presented. The conditions of cyclization reactions, oxidative rearrangement, transition metals catalyzed CH activation and annulation reactions, etc. are discussed. Testing data for some types of biological activity of a number of the 3-thienyl/benzothienylchromones and the products of their transformation into the pyrazole cycle are given.

Novel Furan Coupled Quinoline Diamide Hybrid Scaffolds as Potent Antitubercular Agents: Design, Synthesis and Molecular Modelling

BACKGROUND

A novel series of 2-[(2-{[2-(furan-2-yl) quinolin-4-yl] carbonyl} hydrazinyl) carbonyl] benzoic acid, -4-oxobut-2-enoic acid and -4-oxobutanoic acids were synthesized and screened for in vitro antitubercular activity.

OBJECTIVES

In the present investigation, we describe the synthesis and biological screening of furan C-2 quinoline coupled diamides for antitubercular activity.

METHODS

The mycobacterium tuberculai testing was carried out by MABA method and molecular docking studies were done by open-source molecular docking program, Autovina, using Pyrx 0.8 interface.

RESULTS

The results revealed that the compounds inhibited the growth of H37Rv strain at concentrations as low as 1.6 to 12 µg/ml. Molecular binding of furan, quinoline and diamide (FQD) derivatives on five targets was good and these compounds fit very well within the binding domain of the target protein.

CONCLUSION

The synthesized FQD derivatives exhibited moderate to good inhibition activity especially compounds 5f, 5b and 8a exhibited very good inhibition activity due to the presence of three different scaffolds, such as INH, phenyl ketobutyric acid and fluoroquinolines. Hybridized molecules might have multiple modes of action / inhibit more than one tubercular target and could pave way for novel drug discovery in the field of tuberculosis.

Thiophenes and furans derivatives: a new class of potential pharmacological agents

A new class of potential pharmacological thiophenes and furans compounds has been prepared. The obtained thiophenes and furans derivatives were screened for anti-inflammatory, antinociceptive and antioxidant activity in rats. In vitro hepatic ALA-D activity was also evaluated. Thiophene 2 exhibited higher anti-inflammatory effect than thiophenes 1 and 3. However, compound 1 demonstrated lower IC(50) for lipid peroxidation than 2 and 3 in liver and brain. Furan compounds 4-6 presented similar anti-inflammatory activity. The acetylenic furans 4 and 5 inhibited scarcely lipid peroxidation at low concentration as 10 μM. Conversely, furan compound 6 was the most effective against lipid peroxidation in liver. Furans 4 and 5 inhibited lipid peroxidation, in brain, only in high concentrations. In contrast, furan 6 protected (90%) against lipid peroxidation at 10 μM. Thiophene 1 was devoid of anti-inflammatory activity but was efficient in reducing acetic acid-induced constriction. Conversely, it analogue furan 4 presented anti-inflammatory and antinociceptive activity. Thiophene and furan inhibited hepatic ALA-D only at high concentrations. All compounds displayed antioxidant activity however the anti-inflammatory activity is not related to antioxidant potential.