%0 Journal Article %@ 0040-4020 %A Wang, X %A Nelson, SG %A Curran, DP %D 2007 %F pittir:18566 %J Tetrahedron %N 27 %P 6141 - 6145 %T The azido acid approach to β-peptides: parallel synthesis of a tri-β-peptide library by fluorous tagging %U http://d-scholarship-dev.library.pitt.edu/18566/ %V 63 %X A small tri-β-peptide library was prepared starting from three enantio- and diastereopure azido acids. Fluorous tagging followed by two cycles of azide reduction, fluorous solid phase extraction (f-SPE), peptide coupling with the original azido acids, and f-SPE provided 27 protected azido peptides. Reduction and HPLC purification provided 25 of the 27 targeted tri-β-peptides in acceptable yields and excellent purities. © 2007 Elsevier Ltd. All rights reserved.