Nitrogen-bridgehead compounds: overview, synthesis, and outlook on applications.

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Synthetic Chemistry

Background:

• Nitrogen-bridgehead structures are prevalent in biologically active natural products, including anticancer and antibacterial agents.
• Natural products with these motifs often present challenges in isolation, purification, and derivatization.
• Synthetic approaches offer a viable alternative to overcome limitations associated with natural product sourcing.

Purpose of the Study:

• To provide a comprehensive overview of synthetic methodologies for constructing nitrogen-bridgehead scaffolds.
• To cover synthetic strategies developed between 2000 and 2023.
• To highlight the under-explored bioactivity of synthetically derived nitrogen-bridgehead compounds.

Main Methods:

• Systematic literature review of synthetic procedures for nitrogen-bridgehead compounds.
• Inclusion of relevant reviews covering specific aspects of the topic.
• Focus on methods published from 2000 to 2023.

Main Results:

• A significant number of synthetic methods for creating nitrogen-bridgehead scaffolds have been reported.
• A surprisingly small fraction of these synthetic compounds has been evaluated for biological activity.
• The review consolidates diverse synthetic approaches, offering a valuable resource for chemists.

Conclusions:

• Synthetic chemistry provides efficient access to nitrogen-bridgehead compounds, bypassing natural product limitations.
• There is a substantial opportunity to explore the bioactivity of synthesized nitrogen-bridgehead derivatives.
• This review serves as a guide to existing synthetic strategies and identifies future research directions in medicinal chemistry.