Fully orthogonally protected 2-deoxystreptamine from kanamycin

Area of Science:

• Organic Chemistry
• Biocatalysis
• Synthetic Methodology

Background:

• 2-deoxystreptamine derivatives are crucial building blocks for aminoglycoside antibiotics.
• Efficient synthesis of enantiopure derivatives is essential for drug development.
• Existing synthetic routes can be lengthy and lack stereochemical control.

Purpose of the Study:

• To develop a straightforward and efficient synthesis of a fully orthogonally protected and enantiopure 2-deoxystreptamine derivative.
• To utilize biocatalysis for stereoselective resolution of a key intermediate.
• To establish a robust chemoselective protocol for subsequent functionalization.

Main Methods:

• Enzymatic resolution of a sterically hindered diacetate using a Verenium esterase.
• Chemoselective Staudinger reduction followed by acylation.
• Starting material: commercially available kanamycin.

Main Results:

• Successful preparation of a fully orthogonally protected and enantiopure 2-deoxystreptamine derivative.
• High stereoselectivity achieved through enzymatic resolution.
• Efficient and selective Staudinger reduction-acylation protocol demonstrated.

Conclusions:

• The developed synthetic strategy provides a facile route to valuable 2-deoxystreptamine building blocks.
• Enzymatic resolution offers a green and effective method for obtaining enantiopure intermediates.
• This methodology facilitates access to complex aminoglycoside analogs for further research.