Isolation and crystal structure of lawinal

Area of Science:

• Natural Product Chemistry
• Crystallography
• Organic Chemistry

Background:

• Lawinal is a natural product with a complex chromane structure.
• Understanding the solid-state structure of natural products is crucial for their synthesis and application.

Purpose of the Study:

• To determine the crystal structure of lawinal at low temperature (150 K).
• To confirm the absolute configuration of lawinal.
• To investigate intermolecular interactions in the crystal lattice.

Main Methods:

• Single-crystal X-ray diffraction at 150 K.
• Analysis of crystallographic data to determine molecular geometry and symmetry.
• Comparison with previous stereochemical assignments.

Main Results:

• Lawinal crystallizes in the monoclinic system (I2) with Z'=2.
• The S-configuration at the C-2 position was confirmed.
• Alternating hydrogen-bonded chains and pi-pi interactions between phenyl substituents were observed.

Conclusions:

• The crystal structure of lawinal provides detailed insights into its solid-state organization.
• The findings support previous stereochemical assignments and highlight the role of non-covalent interactions in stabilizing the crystal structure.