Synthesis of rigid p-terphenyl-linked carbohydrate mimetics

Area of Science:

• Organic Chemistry
• Carbohydrate Chemistry
• Medicinal Chemistry

Background:

• Development of carbohydrate mimetics is crucial for drug discovery.
• Unnatural carbohydrate structures offer unique pharmacological properties.
• Rigid scaffolds can enhance binding affinity and selectivity.

Purpose of the Study:

• To synthesize novel β-D-2-aminotalose and β-D-2-aminoidose configured carbohydrate mimetics.
• To create rigid, p-terphenyl-linked C-aryl glycosides with precise dimensions.
• To explore new synthetic routes for unnatural aminosugar analogues.

Main Methods:

• Stereoselective [3 + 3]-cyclization for heterocycle formation.
• Lewis acid-induced rearrangement of oxazines.
• Suzuki cross-couplings for C-aryl glycoside synthesis.
• Hydrogenolysis and N-O bond cleavage for final product formation.

Main Results:

• Successful synthesis of a key p-bromophenyl-substituted 1,2-oxazine intermediate.
• Formation of rigid, p-terphenyl-linked C-aryl glycosides (2.0 nm dimension).
• Generation of unnatural aminosugar mimetics through reduction and hydrogenolysis.
• Investigation of different reagents for N-O bond cleavage.

Conclusions:

• The described approach provides access to novel, rigid carbohydrate mimetics.
• Suzuki cross-couplings are effective for constructing complex C-aryl glycosides.
• The synthesized compounds represent valuable building blocks for medicinal chemistry research.