Simple, versatile and highly diastereoselective synthesis of 1,3,4-trisubstituted-2-oxopiperazine-containing peptidomimetic precursors.
Fiche publication
Date publication
mars 2005
Auteurs
Membres identifiés du Cancéropôle Est :
Pr GUILLAUME Dominique
Tous les auteurs :
Franceschini N, Sonnet P, Guillaume D
Lien Pubmed
Résumé
The selective O-deprotection of (1'S)-4-(tert-butoxycarbonyl)-1-[1'-phenylmethyloxymethyl-2'-[(tert-butyld imethylsilyl)oxy]ethyl]-2-oxopiperazine furnished an enantiomerically pure alcohol whose regio- and diastereoselective C3-alkylation yielded either (3R)- or (3S)-1,3,4-trisubstituted-2-oxopiperazines in high diastereomeric purity. These derivatives were efficiently transformed into (1'R)- or (1'S)-peptide templates utilizable to prepare peptidomimetics. This method provides easy access to each 1,3,4-trisubstituted-2-oxopiperazine diastereomer and facilitates, through the large choice of substituents at the 3-position together with the chemistry that can be performed on the N1 substituent, the preparation of a large number of diastereomerically pure constrained peptidomimetics from a single precursor.
Référence
Org Biomol Chem. 2005 Mar 7;3(5):787-93