Domino Process Achieves Site-Selective Peptide Modification with High Optical Purity. Applications to Chain Diversification and Peptide Ligation
摘要:
The development of peptide libraries by site-selective modification of a few parent peptides would save valuable time and materials in discovery processes but still is a difficult synthetic challenge. Herein, we introduce natural hydroxyproline as a convertible unit for the production of a variety of optically pure amino acids, including expensive N-alkyl amino acids, homoserine lactones, and Agl lactams, and to achieve the mild, efficient, and site-selective modification of peptides. A domino process is used to cleave the customizable Hyp unit under mild, metal-free conditions. Both terminal and internal positions can be modified, and similar customizable units can be differentiated. The resulting products possess two reactive chains which can be manipulated independently. The versatility and scope of this process is highlighted by its application to the ligation of two peptide chains, and the generation of peptides with several chains and peptides with conformational restrictions.
METHOD FOR MODIFYING DERIVATIVES OF AMINO ACIDS AND PEPTIDES, COMPOUNDS PRODUCED, AND USE
申请人:Consejo Superior De Investigaciones Científicas
(CSIC)
公开号:EP2957555A1
公开(公告)日:2015-12-23
The invention relates to a novel method for modifying hydroxylated cyclic amino acids, especially 4-hydroxyproline, which is a commercial, relatively cheap, natural amino acid, in order to provide other amino acids of high optical purity. The initial step of the process is a free-radical excision, and the excision product converts itself into non-proteinogenic amino acids by means of reactions such as reduction, reductive amination, and Horner-Wadsworth-Emmons reactions. The method is characterised in that it is applicable to the selective modification of peptides. The invention also relates to the products of said method, such as amino acids that are N-alkylated and/or have side chains with groups of amino, hydroxyl, alkenyl etc., and to the peptidic derivatives thereof of interest as pharmaceuticals, catalysts, molecular imaging probes etc.
[EN] METHOD FOR MODIFYING DERIVATIVES OF AMINO ACIDS AND PEPTIDES, COMPOUNDS PRODUCED, AND USE<br/>[ES] PROCEDIMIENTO DE MODIFICACIÓN DE DERIVADOS DE AMINOÁCIDOS Y PÉPTIDOS, COMPUESTOS OBTENIDOS Y UTILIZACIÓN<br/>[FR] PROCÉDÉ DE MODIFICATION DE DÉRIVÉS D'ACIDES AMINÉS ET DE PEPTIDES, COMPOSÉS OBTENUS ET UTILISATION CORRESPONDANTE
申请人:CONSEJO SUPERIOR INVESTIGACION
公开号:WO2014125145A1
公开(公告)日:2014-08-21
La presente invención describe un nuevo procedimiento para la modificación de amino ácidos cíclicos hidroxilados, particularmente la 4-hidroxiprolina, que es un amino ácido natural, comercial y relativamente barato, para dar otros amino ácidos de alta pureza óptica. El paso inicial del proceso es una escisión radicalaria, y el producto de escisión se convierte en amino ácidos no proteinogénicos usando reacciones como por ejemplo la reducción, la aminación reductiva, y la Horner-Wadsworth-Emmons. Es de destacar la aplicación del procedimiento a la modificación selectiva de péptidos. También se describen los productos de dicho procedimiento, como amino ácidos N-alquilados y/o con cadenas laterales con grupos amino, hidroxilo, alquenilo, etc. y sus derivados peptídicos, de interés como fármacos, catalizadores, sondas para imagen molecular, etc.