Azobenzene cleavable linker. Treatment with sodium dithionite (sodium hydrosulfite) reduces azo functionality, cleaving the N-N bond to yield two primary amines. Has been used in proteomic and affinity chromatography applications. Boc group on the primary amine can be removed under acidic conditions (MeOH, CH3COCl, 0 degrees C to RT, Et2O, 1 h). The azide can be reacted with a terminal alkyne or cyclooctyne derivative via the 1,3 dipolar cycloaddition click chemistry reaction.
A new chemically-cleavable linker has been synthesised for the affinity-independent elution of biomolecules by classical affinity chromatography. This azo-based linker is shown to couple efficiently with "click" derivatised ligands such as biotin propargyl amide through a copper(I)-catalysed Huisgen 1,3-dipolar cycloaddition
A mild chemically cleavable linker system for functional proteomic applications.
Steven H L Verhelst et al.
Angewandte Chemie (International ed. in English), 46(8), 1284-1286 (2007-01-06)
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