Diversity-Oriented Method Development: Multifunctional Homoallylic Amines and Azabicyclooctanes Bearing a Bridgehead...

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Catalysis

Background:

• Diversity-oriented synthesis (DOS) is crucial for drug discovery.
• Efficient methods are needed to construct complex molecular scaffolds.
• Accessing stereochemically defined polycyclic structures remains a challenge.

Purpose of the Study:

• To introduce two new synthetic methodologies for constructing complex organic molecules.
• To enable the efficient and stereoselective synthesis of novel scaffolds.
• To facilitate the creation of natural product-like rigid bicyclic frameworks.

Main Methods:

• Copper-catalyzed multicomponent reaction of nitriles and allenyl boronates.
• Triflic anhydride-mediated conversion of unsaturated azapane-amides.
• Stereoselective functionalization of azabicyclooctanes (ABCOs).

Main Results:

• Homoallylic amines synthesized with >98% enantiospecificity and >98:2 dr.
• Formation of a single alkene isomer (>98% Z).
• Efficient diastereoselective synthesis of azabicyclooctanes (ABCOs) with bridged enamine and alkene moieties.

Conclusions:

• The developed methods provide access to complex, stereochemically defined molecular architectures.
• The resulting azabicyclooctanes offer platforms for further chemo- and stereoselective functionalization.
• These strategies are valuable for diversity-oriented synthesis and natural product-like framework construction.