Solid-Phase Synthesis of “Mixed” Peptidomimetics Using Fmoc-Protected Aza-β3-amino Acids and α-Amino Acids
摘要:
A solid-phase fluorenylmethyloxycarbonyl (Fmoc)-based synthesis strategy is described for "mixed" aza-beta(3)-peptides as well as a convenient general approach for their required building blocks, the aza-beta(3)-amino acid residues (aza-beta(3)-aa). These monomers allow the synthesis of relatively large quantities of pure mixed aza-beta(3)-peptides. The required Fmoc-substituted aza-beta(3)-amino acids are accessible by convenient synthesis, and a number of monomers including those containing side chains with functional groups have been synthesized. The method was applied toward the solid-phase synthesis of aza-beta(3)-peptide mimetics of a biologically active histone H4 sequence.
A solid-phase fluorenylmethyloxycarbonyl (Fmoc)-based synthesis strategy is described for "mixed" aza-beta(3)-peptides as well as a convenient general approach for their required building blocks, the aza-beta(3)-amino acid residues (aza-beta(3)-aa). These monomers allow the synthesis of relatively large quantities of pure mixed aza-beta(3)-peptides. The required Fmoc-substituted aza-beta(3)-amino acids are accessible by convenient synthesis, and a number of monomers including those containing side chains with functional groups have been synthesized. The method was applied toward the solid-phase synthesis of aza-beta(3)-peptide mimetics of a biologically active histone H4 sequence.
Design, synthesis and cardioprotective effect of a new class of dual-acting agents: Phenolic tetrahydro-β-carboline RGD peptidomimetic conjugates
作者:Wei Bi、Jianhui Cai、Sanguang Liu、Michèle Baudy-Floc’h、Lanrong Bi
DOI:10.1016/j.bmc.2007.08.022
日期:2007.11
In this study, a new class of phenolic tetrahydro-beta-carboline RGD peptidomimetic conjugates was designed and synthesized. The radical scavenging activities of these newly synthesized compounds 12a-c were evaluated in PC 12 cell survival assays. The NO scavenging activities of these compounds were confirmed in the acetylcholine-induced vasorelaxation assay. Compounds 12a-c were efficacious in a rat arterial thrombosis model, and were active in ADP- or PAF-induced in vitro platelet aggregation assays, which Suggests these compounds also possess anti-thrombotic activity. The beneficial effects of dual-acting agent 12c were demonstrated on the ischemia-reperfusion induced cardiac infarct size and oxidative change in an in vivo rat model. (C) 2007 Elsevier Ltd. All rights reserved.
A New Synthetic Route to Protected α-Hydrazinoesters in High Optical Purity Using the Mitsunobu Protocol