Amino acid derivatives of IAA and IPA are prepared conveniently and efficiently by coupling of readily available 2a-b with diverse free amino acids 3a-g and (3c+3c') to give compounds 4a-j, (4c+4c') and (4h+4h') in 38-70% yields. Similarly, 2a-b afforded IAA and IPA peptide conjugates 6a-b in 32-40% yields. Complete retention of chirality was supported by NMR and HPLC analysis.
作者:Alan R. Katritzky、Levan Khelashvili、Munawar Ali Munawar
DOI:10.1021/jo8017796
日期:2008.11.21
Amino acid derivatives of IAA and IPA are prepared conveniently and efficiently by coupling of readily available 2a-b with diverse free amino acids 3a-g and (3c+3c') to give compounds 4a-j, (4c+4c') and (4h+4h') in 38-70% yields. Similarly, 2a-b afforded IAA and IPA peptide conjugates 6a-b in 32-40% yields. Complete retention of chirality was supported by NMR and HPLC analysis.
Dynamic Amino Acid Side‐Chains Grafting on Folded Peptide Backbone**
An efficient access to large libraries of conformationally defined peptides is reported, using dynamic combinatorial chemistry as a tool to graft amino acid's side-chains in defined arrangement on a well-ordered 3D peptide scaffold. We report here the design of a chemical system that ensures the scrambling of side-chains on a pre-organized scaffold leading to an isoenergetic library useful for ligand
据报道,使用动态组合化学作为工具,在有序的 3D 肽支架上以定义的排列方式移植氨基酸的侧链,从而有效地访问大型构象定义的肽库。我们在此报告了一种化学系统的设计,该系统可确保在预先组织的支架上对侧链进行加扰,从而产生可用于配体筛选的等能文库。