Marked small molecule libraries: A new approach to molecular probe design

ORGN 899

Alison N. Hulme, Alison.Hulme@ed.ac.uk1, Iain A. Inverarity, I.A.Inverarity@sms.ed.ac.uk1, and Philip Cohen, p.cohen@dundee.ac.uk2. (1) School of Chemistry, University of Edinburgh, Edinburgh, EH9 3JJ, United Kingdom, (2) School of Life Sciences, University of Dundee, Dundee, DD1 5EH, United Kingdom
A truncated approach to the design of molecular probes from small molecule libraries is outlined, based upon the incorporation of a bioorthogonal marker on the molecular scaffold. This has been demonstrated through the synthesis of a focused compound library centered upon the known stress activated protein kinase (SAPK) pathway activator, anisomycin. The active marked library members have been used to synthesize a series of molecular probes, using the copper(I)-catalysed Huisgen cycloaddition reaction. Using this strategy, library members and tags have been coupled in a rapid and atom economical fashion. A series of functionally active molecular probes have been synthesized, containing biotin and fluorophore tags, and these are currently being used to elucidate anisomycin's activation of the SAPK pathways.