Aqueous in situ one-pot N-Boc-deprotection-cyclization of N alpha-Boc-dipeptidyl-tert-butyl and methyl esters under microwave irradiation afforded 2,5-diketopiperazines (DKPs) in excellent yields. This protocol is rapid, safe, environmentally friendly, and highly efficient, and showed that the tert-butoxy moiety is also an excellent leaving group for these cyclizations.
Linear and cyclic dipeptides with antimalarial activity
作者:Lemuel Pérez-Picaso、Horacio F. Olivo、Rocío Argotte-Ramos、María Rodríguez-Gutiérrez、María Yolanda Rios
DOI:10.1016/j.bmcl.2012.09.094
日期:2012.12
among them linear di-, tri-, tetra- and pentapeptides and their cyclic analogs. In an attempt to find dipeptides with antimalarial activities we show that linear and cyclicdipeptides, the latter known as diketopiperazines, still retain the fundamental core to preserve antimalarial activity. Thirteen lineardipeptides and ten diketopiperazines were investigated. Eight lineardipeptides showed IC50