Twisting the ethano-Tröger's base: the bisamide.

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Stereochemistry

Background:

• Amide groups are typically planar, influencing molecular properties and reactivity.
• Incorporating amides into bicyclic systems can induce significant distortions from planarity.
• These distortions lead to unique physical and chemical behaviors compared to classical amides.

Purpose of the Study:

• To develop a concise method for synthesizing non-planar bisamide compounds.
• To explore the synthesis of ethano-Tröger's base derivatives with ortho-nitrogen substituents.
• To investigate the impact of distorted amide geometry on molecular properties.

Main Methods:

• Utilized potassium permanganate for selective α-oxygenation.
• Targeted the benzylic position of ethano-Tröger's base derivatives.
• Developed a protocol for synthesizing substituted ethano-Tröger's base derivatives.

Main Results:

• Successfully synthesized a new class of twisted bisamides.
• Achieved selective α-oxygenation at the benzylic position.
• Reported the first synthesis of ethano-Tröger's base derivatives with ortho-nitrogen substituents.

Conclusions:

• The developed protocol provides access to novel twisted bisamide structures.
• Distorted amide geometries in bicyclic systems offer unique chemical reactivity.
• This work expands the synthetic accessibility of complex nitrogen-containing heterocycles.