An Enzyme-Labile Linker Group for Organic Syntheses on Solid Supports

Area of Science:

• Organic Chemistry
• Biocatalysis
• Combinatorial Chemistry

Background:

• Solid-phase organic synthesis relies on robust linkers for compound construction.
• Enzyme-labile linkers offer mild cleavage conditions, preserving sensitive functional groups.

Purpose of the Study:

• To investigate the use of lipases and esterases for cleaving 4-acetyloxybenzyloxy linkers.
• To demonstrate selective release of diverse compounds synthesized via combinatorial chemistry.

Main Methods:

• Utilized lipases and esterases for fragmentation of a support-bound 4-acetyloxybenzyloxy linker.
• Performed cleavage reactions under mild conditions (pH 6-7, room temperature).
• Characterized released compounds including amines, alcohols, and carboxylic acids.

Main Results:

• Enzyme-initiated fragmentation of the linker was successful.
• Cleavage occurred under very mild, room temperature conditions.
• Complete selectivity was achieved in releasing various compound classes (X=NH, O, CR2).

Conclusions:

• Lipases and esterases are effective biocatalysts for cleaving 4-acetyloxybenzyloxy linkers in solid-phase synthesis.
• This enzymatic approach enables mild and highly selective release of diverse molecules for combinatorial chemistry.
• The method offers a valuable alternative to traditional chemical cleavage techniques.