作者:Darryl D. DesMarteau、Changqing Lu
DOI:10.1016/j.tetlet.2005.11.038
日期:2006.1
Trifluoroethylated N-termini in linear dipeptideS L-TyrXOR [X = Gly, D-Ala, L-Leu, L-Phe, and L-Glu; R = H, Me, Et] exhibit sufficient nucleophilicity to give piperazine-2,5-dione ring formation through intramolecular cyclization reaction in acidic aqueous solutions. The reactions occur in high yield and with absolute configuration retention. (c) 2005 Elsevier Ltd. All rights reserved.