A [2 + 2 + 2]-cycloaddition approach toward 6-oxa-allocolchicinoids with apoptosis-inducing activity

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Chemical Synthesis

Background:

• Colchicinoids are a class of natural products with potent biological activities.
• Developing efficient synthetic routes to novel colchicinoid analogs is crucial for drug discovery.
• The A --> ABC strategy offers a framework for complex molecule synthesis.

Purpose of the Study:

• To develop a novel and efficient synthetic strategy for 6-oxa-allocolchicinoids.
• To explore the synthesis of diverse novel compounds using this strategy.
• To evaluate the potential of these novel compounds as anti-cancer agents.

Main Methods:

• Utilizing a microwave-promoted Co- or Rh-catalyzed intramolecular [2 + 2 + 2]-cycloaddition (alkyne cyclotrimerization) as the key synthetic step.
• Implementing an A --> ABC synthetic approach for streamlined access to target molecules.
• Synthesizing a variety of novel 6-oxa-allocolchicinoid derivatives.

Main Results:

• A short and efficient synthetic route to 6-oxa-allocolchicinoids was established.
• A library of novel compounds was successfully synthesized.
• Several synthesized compounds demonstrated significant and selective apoptosis-inducing activity against BJAB tumor cells.

Conclusions:

• The developed synthetic strategy provides rapid access to novel 6-oxa-allocolchicinoids.
• The identified compounds hold promise as potential anti-cancer therapeutics.
• This approach facilitates further exploration of structure-activity relationships in colchicinoid analogs.