This invention relates to methods for preparing cyclic peptides and peptidomimetic compounds in solution and bound to solid supports, and to cyclic peptide or peptidomimetic libraries for use in drug screening programmes. In particular, the invention relates to a generic strategy for synthesis of cyclic peptides or peptidomimetics that enables the efficient synthesis under mild conditions of a wide variety of desired compounds. Two approaches were evaluated for their improvements in solution and solid phase synthesis of small cyclic peptides: positioning reversible N-amide substituents in the sequence; and applying native ligation chemistry in an intramolecular sense. Systematic investigation of the effects of preorganizing peptides prior to cyclisation by using peptide cyclisation auxiliaries, and developing new linkers and peptide cyclisation auxiliaries to aid cyclic peptide synthesis gives surprising improvements in both yields and purity of products compared to the prior art methods. The combination of these technologies provides a powerful generic approach for the solution and solid phase synthesis of small cyclic peptides. The ring contraction and N-amide substitution technology of the invention provide improved methods for the synthesis of cyclic peptides and peptidomimetics. When used in conjunction with linker strategies, this combination provides solid-phase avenues to cyclic peptides and peptidomimetics.
本发明涉及制备溶液中和固定于固体支持物中的环肽和肽类似化合物的方法,以及用于药物筛选计划的环肽或肽类似物库。特别是,本发明涉及一种通用的合成环肽或肽类似物的策略,使得在温和条件下高效合成各种所需化合物成为可能。针对小环肽的溶液和固相合成,评估了两种方法的改进:在序列中定位可逆的N-酰胺取代基;并在分子内应用天然连接
化学。通过使用肽环化辅助剂预先组织肽链进行环化,并开发新的连接剂和肽环化辅助剂以帮助合成环肽,系统地研究了这些辅助剂对环化前的肽的影响,相比现有技术方法,这些技术的组合提供了一种强大的通用方法,用于小环肽的溶液和固相合成。本发明的环收缩和N-酰胺取代技术提供了改进的环肽和肽类似物的合成方法。当与连接剂策略一起使用时,这种组合提供了固相途径到环肽和肽类似物。