An Iterative Phosphate Tether Mediated Approach for the Synthesis of Complex Polyol Subunits.

Area of Science:

• Organic Chemistry
• Synthetic Chemistry
• Asymmetric Synthesis

Background:

• Polyol subunits are crucial building blocks in various complex molecules.
• Efficient and economical synthetic routes are needed for advanced polyol structures.

Purpose of the Study:

• To develop a pot-economical strategy for the asymmetric synthesis of complex polyol subunits.
• To streamline the synthesis through sequential, one-pot operations.

Main Methods:

• Iterative use of a phosphate tether for one-pot sequential reactions: Ring-Closing Metathesis (RCM), Cross Metathesis (CM), and hydrogenation (H2).
• Subsequent regio-/diastereoselective cuprate addition or Palladium-catalyzed reductive allylic transposition.
• Minimization of workup and purification steps.

Main Results:

• Successful asymmetric synthesis of 12 complex polyol subunits.
• Achieved in 4-6 one-pot sequential operations, involving 12-14 total reactions.
• 4-5 catalytic reactions were employed, highlighting efficiency.

Conclusions:

• The reported method provides a highly efficient and economical approach to advanced polyol subunits.
• The strategy significantly reduces synthetic steps and purification efforts.
• This methodology is valuable for accessing complex polyol structures in organic synthesis.