Antimitotic and vascular disrupting agents: 2-hydroxy-3,4,5-trimethoxybenzophenones

Area of Science:

• Medicinal Chemistry
• Organic Synthesis
• Cancer Biology

Background:

• Benzophenones with pseudo-ring formation, involving intramolecular hydrogen bonding, were synthesized.
• Previous research suggests potential biological activities of modified benzophenone structures.

Purpose of the Study:

• To synthesize and evaluate novel 2-hydroxy-3,4,5-trimethoxybenzophenone derivatives.
• To assess the antiproliferative, tubulin binding, and vascular-disrupting properties of these compounds.

Main Methods:

• Synthesis of benzophenone derivatives (8-16).
• Antiproliferative assays against KB cells.
• Tubulin affinity studies.
• In vitro assessment of vascular-disrupting properties using human umbilical vein endothelial cells.

Main Results:

• Compounds 14 and 16 demonstrated significant antiproliferative activity against KB cells (IC50 values of 11.1 and 11.3 nM).
• These compounds exhibited tubulin affinity comparable to combretastatin A-4.
• Compounds 14 and 16 displayed concentration-dependent vascular-disrupting properties in endothelial cells.

Conclusions:

• The pseudo-ring concept in these benzophenones is supported by the observed biological activities.
• Compounds 14 and 16 are promising candidates for further investigation as anticancer agents.
• Modification of the A-ring in these benzophenones warrants further exploration.