1607844-49-4Relevant academic research and scientific papers
Privileged structures as peptide backbone constraints: Polymer-supported stereoselective synthesis of benzimidazolinopiperazinone peptides
Ventosa-Andres, Pilar,Hradilova, Ludmila,Krchnak, Viktor
, p. 359 - 366 (2014)
A molecular scaffold comprising a privileged structure was designed and synthesized to serve as a peptide backbone conformational constraint. The synthesis of highly functionalized 2,3,10,10a-tetrahydrobenzo[4,5]imidazo[1,2-a] pyrazin-4(1H)-ones on a solid-phase support was performed via a tandem N-acyl-N-aryliminium ion cyclization-nucleophilic addition reaction. The synthesis proceeded with full stereocontrol of the newly formed stereogenic center. Conventional and microwave-assisted syntheses were compared with respect to efficiency and the optical integrity of the target compounds. Significant epimerization was observed during acylation with (S)- and (R)-2-bromopropionic acids under microwave conditions.
