title: Rapid generation of macrocycles with natural-product-like side chains by multiple multicomponent macrocyclizations (MiBs).
abstract: A small parallel library of peptoid macrocycles with natural-product-derived side chains of biological importance was produced by Ugi-type multiple multicomponent macrocyclizations including bifunctional building blocks (Ugi-MiBs). Diverse exocyclic elements of high relevance in natural recognition processes, i.e., all functional amino acid residues (e.g., Cys, Arg, His, Trp) and even sugar moieties, can be introduced in a one-pot process into different types of peptoid-containing macrocyclic skeletons. This is exemplified by the use of a diamine/diisocyanide combination of Ugi-MiBs and N-protected alpha-amino acids or carboxy-functionalized carbohydrates as source for the natural-product-like exocyclic elements. Employed as the acid components of the multiple Ugi reactions, they appear as N-amide substituents on the macrocyclic cores. The use of different diamines and diisocyanides allows an easy variation of the N- to C-directionality and therefore of the position of the exocyclic elements.
authors.affiliation: Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle/Saale, Germany.
authors.forename: Daniel G
authors.initials: DG
authors.lastname: Rivera
authors.forename: Otilie E
authors.initials: OE
authors.lastname: Vercillo
authors.forename: Ludger A
authors.initials: LA
authors.lastname: Wessjohann
mesh_terms: D001688:Biological Products / Q000138:chemical synthesis* / Q000737:chemistry; D003500:Cyclization; D047028:Macrocyclic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D013997:Time Factors
chemical_list: D001688:Biological Products; D047028:Macrocyclic Compounds