Here we prepared and evaluated two libraries of mono-N-methylated and di-N-methylated diketopiperazines (DKPs) by parallel artificial membrane permeability assay and immobilized artificial membrane chromatography in order to obtain information on the features that govern the passage of peptidic molecules across the blood-brain barrier (BBB) by passive diffusion. On the basis of the results from these two libraries, we prepared and evaluated several DKP-baicalin and DKP-dopamine constructs. The DKPs or cyclic dipeptide scaffolds can be considered a novel family of brain delivery systems (BBB-shuttles) to transport to the brain drugs and other cargos that cannot cross the BBB unaided.
Switchable Synthesis of 7‐ and 14‐Membered Cyclic Peptides Containing <i>N</i>‐Methyl‐ and β‐Amino Acids Utilizing Microflow Technology
作者:Shinichiro Fuse、Ren Okabe
DOI:10.1002/ejoc.202300700
日期:2023.9.14
Switchable synthesis of 7- and 14-membered cyclicpeptides containing non-proteinogenic amino acids was achieved. This is the first report that describes the synthesis of smaller cyclic N-methylated peptides via dimerization-cyclization strategy.