Building units for N-backbone cyclic peptides. 1. Synthesis of protected N-(.omega.-aminoalkylene)amino acids and their incorporation into dipeptide units
摘要:
A variety of new amino acids which contain an omega-aminoalkylene group on the N(alpha)-amino nitrogen were synthesized by alkylation of alkylenediamines with alpha-halogeno acids. The reaction proceeds with inversion of configuration; thus, optically pure products were obtained when optically active a-halogeno acids were used. The N-(omega-aminoalkylene)amino acids were protected by orthogonal protecting groups to allow their incorporation into dipeptides by the "solution" techniques and into peptides by the solid-phase peptide synthesis (SPPS) methodology. A series of dipeptide analogs of Phe-Gly, Leu-Gly, Trp-Gly, Phe-Leu, and Phe-Ala in which the nitrogen of the peptide bond is alkylated by omega-aminoalkylene chains with various lengths were prepared. These new protected N-(omega-aminoalkylene)amino acids and their derived dipeptide units may be used as building blocks for conformationally constrained N-backbone cyclic peptides.
Modification of the binding affinity of peptide nucleic acids (PNA). PNA with extended backbones consisting of 2-aminoethyl-β-alanine or 3-aminopropylglycine units
作者:Birgitte Hyrup、Michael Egholm、Marc Rolland、Peter E. Nielsen、Rolf H. Berg、Ole Buchardt
DOI:10.1039/c39930000518
日期:——
The binding affinity between peptidenucleicacids (PNA) and DNA is reduced by incorporation of PNA units with extended backbones.
[EN] SYNTHESIS OF CYCLOCREATINE AND ANALOGS THEREOF<br/>[FR] SYNTHÈSE DE CYCLOCRÉATINE ET DE SES ANALOGUES
申请人:LUMOS PHARMA INC
公开号:WO2016145286A1
公开(公告)日:2016-09-15
Provided herein is a process and intermediates for the preparation of a compound of formula (I): or a pharmaceutically acceptable salt thereof, using cyanamide in the reaction.
Specificity of creatine kinase. New glycocyamines and glycocyamine analogs related to creatine
作者:Gerald L. Rowley、Arno L. Greenleaf、George L. Kenyon
DOI:10.1021/ja00750a038
日期:1971.10
Using a Build-and-Click Approach for Producing Structural and Functional Diversity in DNA-Targeted Hybrid Anticancer Agents
作者:Song Ding、Xin Qiao、Gregory L. Kucera、Ulrich Bierbach
DOI:10.1021/jm301278c
日期:2012.11.26
An efficient screening method was developed for functionalized DNA targeted platinum-containing hybrid anticancer agents based on metal mediated amine-to-nitrile addition, a form of "click" chemistry. The goal of the study was in generate platinum-acridine agents for their use as cytotoxic "warheads" in targeted and multifunctional therapies. This was achieved by introducing hydroxl, carboxylic acid, and azide functionalities in the acridine linker moiety and by varying the nonleaving groups attached to platinum. The assay, which was based on microscale reactions between 6 platinum-nitrile complexes and 10 acridine derivatives, yielded a small library of 60 platinum-acridines. Reactions were monitored, and product mixtures were quantitatively analyzed by automated in-line high-performance liquid chromatography-electrospray mass spectrometry (LC-ESMS) analysis and subjected to cell viability screening using a nonradioactive cell proliferation assay. The new prescreening methodology proves to be a powerful tool for establishing structure-activity relationships and for identifying target compounds.