Substituted pyrroles via olefin cross-metathesis

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Medicinal Chemistry

Background:

• Pyrroles are important heterocyclic compounds found in numerous pharmaceuticals.
• Efficient synthetic routes to substituted pyrroles are crucial for drug discovery.
• Trans-γ-aminoenones are versatile intermediates in organic synthesis.

Purpose of the Study:

• To develop a novel and efficient method for synthesizing substituted pyrroles.
• To utilize olefin cross-metathesis for the preparation of key intermediates.
• To demonstrate the application of this methodology in the synthesis of a pharmaceutically relevant compound.

Main Methods:

• Employing olefin cross-metathesis (CM) to generate trans-γ-aminoenones.
• Subjecting the aminoenone intermediates to acid-catalyzed or Heck arylation conditions.
• Utilizing the developed method for the synthesis of the pyrrole subunit of Atorvastatin.

Main Results:

• Successfully synthesized diverse trans-γ-aminoenones via CM.
• Converted these intermediates into mono-, di-, and trisubstituted pyrroles.
• Demonstrated the practical utility by synthesizing the tetrasubstituted pyrrole core of Atorvastatin.

Conclusions:

• Olefin cross-metathesis provides an efficient entry to trans-γ-aminoenones.
• These intermediates are readily converted to various substituted pyrroles.
• This methodology offers a valuable approach for constructing complex pyrrole-containing molecules, including pharmaceuticals.