Optimized 5-membered heterocycle-linked pterins for the inhibition of Ricin Toxin A.
Pruet, J.M., Saito, R., Manzano, L.A., Jasheway, K.R., Wiget, P.A., Kamat, I., Anslyn, E.V., Robertus, J.D.(2012) ACS Med Chem Lett 3: 588-591
- PubMed: 23050058 
- DOI: https://doi.org/10.1021/ml300099t
- Primary Citation of Related Structures:  
4ESI - PubMed Abstract: 
The optimization of a series of pterin amides for use as Ricin Toxin A (RTA) inhibitors is reported. Based upon crystallographic data of a previous furan-linked pterin, various expanded furans were synthesized, linked to the pterin and tested for inhibition. Concurrently, hetero-analogs of furan were explored, leading to the discovery of more potent triazol-linked pterins. Additionally, we discuss a dramatic improvement in the synthesis of these pterin amides via a dual role by diazabicycloundecene (DBU). This synthetic enhancement facilitates rapid diversification of the previously challenging pterin heterocycle, potentially aiding future medicinal research involving this structure.
Organizational Affiliation: 
Department of Chemistry and Biochemistry, University of Texas at Austin, 1 University Station A1590, Austin, TX 78712, USA.