A Second-Generation Approach Toward the Total Synthesis of Dodecahedrane Using a Photochemical Stereoisomerization

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Molecular Engineering

Background:

• Dodecahedrane is a highly symmetric, strain-free molecule with potential applications in materials science and nanotechnology.
• Previous synthetic routes to dodecahedrane have been lengthy and low-yielding, necessitating novel approaches.

Purpose of the Study:

• To develop a second-generation synthetic strategy for dodecahedrane.
• To leverage dodecahedrane's unique symmetry in retrosynthetic analysis.
• To explore photochemical and dimerization methods for constructing dodecahedrane precursors.

Main Methods:

• Symmetry-guided retrosynthetic analysis of dodecahedrane.
• Photochemical bis-epimerization for monomer fragment synthesis.
• Dimerization studies of key intermediates.
• Exploration of olefin metathesis for carbon-carbon bond formation.

Main Results:

• Successful synthesis of several intermediates containing 18 out of 20 carbons of dodecahedrane.
• Demonstration of a photochemical bis-epimerization reaction for fragment synthesis.
• Initial challenges encountered with olefin metathesis for key bond formation.

Conclusions:

• Symmetry-based disconnections are a powerful strategy for complex molecule synthesis.
• The developed approach provides a viable pathway towards dodecahedrane.
• Further optimization of carbon-carbon bond-forming reactions is required.