[EN] SYNTHESIS OF BIS-PEPTIDES OLIGOMERS COMPRISING AT LEAST ONE N-SUBSTITUTED DIKETOPIPERAZINE AS STRUCTURAL MOIETY [FR] SYNTHÈSE D'OLIGOMÈRES DE BIS-PEPTIDES COMPORTANT AU MOINS UNE DICÉTOPIPÉRAZINE N-SUBSTITUÉE EN TANT QUE GROUPE FONCTIONNEL STRUCTUREL
[EN] SYNTHESIS OF BIS-PEPTIDES OLIGOMERS COMPRISING AT LEAST ONE N-SUBSTITUTED DIKETOPIPERAZINE AS STRUCTURAL MOIETY [FR] SYNTHÈSE D'OLIGOMÈRES DE BIS-PEPTIDES COMPORTANT AU MOINS UNE DICÉTOPIPÉRAZINE N-SUBSTITUÉE EN TANT QUE GROUPE FONCTIONNEL STRUCTUREL
Synthesis of Hexa- and Pentasubstituted Diketopiperazines from Sterically Hindered Amino Acids
作者:Zachary Z. Brown、Christian E. Schafmeister
DOI:10.1021/ol100048g
日期:2010.4.2
Steric hindrance assists in the formation of hindered diketopiperazines using acyl-transfer coupling. In acyl-transfer coupling, the carboxylate of an unprotected N-alkylamino acid attacks an active ester to form a transient anhydride that undergoes an O,N acyl transfer to form a tertiary amide. If the active ester is part of an N-alkylamino acid it will form a diketopiperazine. It is demonstrated here that acyl-transfer coupling can assemble highly functionalized bis-peptides bearing a functional group on every monomer.