Cholinesterase Inhibitory Activities of Selected Halogenated Thiophene Chalcones

BACKGROUND

Dual-acting human monoamine oxidase B (hMAO-B) and cholinesterase (ChE) inhibitors are more effective than the classic one-drug one-target therapy for Alzheimer's disease (AD).

METHODS

The ChE inhibitory ability of some halogenated thiophene chalcone-based molecules known to be selective hMAO-B inhibitors was evaluated.

RESULTS

Based on the IC50 values, the selected compounds were found to moderately inhibit ChE, with IC50 values in the range of 14-70 µM. Among the synthesised molecules, T8 and T6 showed the most potent inhibitory activity against AChE and BChE, respectively.

CONCLUSION

Taken together, the data revealed that T8 could be further optimized to enhance its AChE inhibitory activity.

New Approaches for the Uses of Cyclohexan-1,4-dione for the Synthesis of 5,6,7,8-tetrahydrobenzo[4,5]thieno[2,3-b]pyridine Derivatives used as Potential Anti-prostate Cancer Agents and Pim-1 Kinase Inhibitors

BACKGROUND

Among the wide range of heterocycles, tetrahydrobenzothienopyridine derivatives acquired a special attention due to their wide range of pharmacological activities especially the therapeutic activities. Many pharmacological drugs containing the thiophene nucleus were known in the market.

METHOD

A series of tetrahydrobenzothienopyridine derivatives were synthesized from the reaction of 2-amino- 3-benzoyl-4,5-dihydrobenzo[b]thiophen-6(7H)-one, synthesized and used for further heterocyclization reactions through reaction with different reagents.

RESULTS

Antiproliferative evaluations and c-Met kinase, Pim-1 kinase inhibitions were performed where some compounds revealed high activities.

CONCLUSION

The inhibition of the newly synthesized compounds towards c-Met kinase, the five c-Metdependent cancer cell lines (A549, HT-29, MKN-45, U87MG, and SMMC-7721) and one c-Met-independent cancer cell line (H460) were investigated using foretinib as a standard drug. The results showed that compounds 6b, 7e, 9b, 9e, 16c and 20d were more active than foretinib. Furthermore, compounds 6b, 13b, 16b and 16c were selected to examine their Pim-1 kinase inhibition activity, where compounds 16b and 16c were of high potencies with IC50 values of 0.28 and 0.32 µM, while compounds 6b and 13b were less effective (IC50 > 10 µM).

Heterocyclization of Thiophenes Derived from Estrone Followed by Cytotoxic, HTRF Kinase and Pim-1 Kinase Evaluations

BACKGROUND

A wide range of heterocyclic steroidal derivatives gained a special attention due to their wide range of pharmacological activities especially the therapeutic activities. Many pharmacological drugs containing the steroid nucleus are known in the market.

OBJECTIVE

Our main aim of this work was to synthesise a series of heterocyclic compounds especially thiophene and thienopyridine derivatives containing the estrone nucleus. The synthesized compounds posses antitumor and kinases inhibitions.

METHOD

Thiophene derivatives of estrone were synthesized and used for further heterocyclization reactions through the reaction with the different reagent.

RESULTS

Antiproliferative evaluations and c-Met kinase, Pim-1 kinase inhibitions were performed where some compounds revealed high activities.

CONCLUSION

Compounds that showed high antiproliferative activity and c-Met- kinase inhibitions were tested for all compounds. The most promising compounds 3b, 5c, 6c, 8d, 8f, 13e, 13f, 18b and 20d were further investigated against tyrosine kinase (c-Kit, Flt-3, VEGFR-2, EGFR, and PDGFR). Compounds 6b, 13b, 16b and 16c were selected to examine their Pim-1 kinase inhibition activity where compounds 11c, 18b and 20f showed high activities. Structure-Activity Relationship (SAR) was rationalized by looking at the varying structural features of the molecules.