Parallel synthesis of a vitamin D(3) library in the solid-phase.

Area of Science:

• Organic Chemistry
• Medicinal Chemistry
• Synthetic Chemistry

Background:

• Vitamin D(3) and its analogues are crucial in various biological processes.
• Developing efficient synthetic routes for vitamin D(3) analogues is essential for research and therapeutic applications.

Purpose of the Study:

• To develop highly efficient solid-phase synthesis strategies for vitamin D(3) and its analogues.
• To enable parallel synthesis and diversification of vitamin D(3) analogues for broader applications.

Main Methods:

• Two distinct solid-phase synthesis strategies were developed for vitamin D(3) analogues.
• Immobilization of CD-ring precursors onto solid supports (PS-DES resin, chlorosulfonate resin).
• Utilized Horner-Wadsworth-Emmons reaction, Cu(I)-catalyzed Grignard reagent for simultaneous side chain introduction and cleavage, and combinatorial chemistry for parallel synthesis.

Main Results:

• Successfully synthesized the vitamin D(3) system on solid support with high efficiency.
• Developed specific strategies for 11-hydroxy analogues and other synthetic analogues.
• Demonstrated parallel synthesis of diverse vitamin D(3) analogues using split and pool methodology and radio frequency encoded combinatorial chemistry.
• Efficient preparation of various A-ring building blocks was also achieved.

Conclusions:

• The described solid-phase synthesis offers an efficient and versatile approach for generating vitamin D(3) analogues.
• The methodology facilitates parallel synthesis and diversification, accelerating the discovery of novel vitamin D(3) derivatives.
• This approach provides valuable building blocks for further research in vitamin D chemistry and pharmacology.