title: Synthesis of naturally occurring uridine-alpha-amino acid derivatives by the application of Ugi reaction.
abstract: A simultaneous condensation (Ugi reaction) of four components (aldehyde, amine, isocyanide, and carboxylic acid) may be a useful reaction for the construction of N,N'-disubstituted alpha-aminocarboxamide structure. We have found that the reaction involving (2-picolyl 1-oxide) amine (op-amine) gave rise to a product, one of whose nitrogen-substituent could be easily removed to give mono-substituted derivative. Thus, the polyoxin skeleton as well as 3-(3-amino-3-carboxypropyl) uridine (a modified nucleoside in certain t-RNAs) were synthesized by the Ugi reaction by the use of the "op"-amine and appropriate aldehyde derived from uridine. Attempted synthesis of these nucleoside derivatives by the condensation involving (2-picolyl 1-oxide) isocyanide as well as the "op"-amine will be also touched on briefly.
mesh_terms: D007202:Indicators and Reagents; D008722:Methods; D010455:Peptides / Q000138:chemical synthesis; D011741:Pyrimidine Nucleosides / Q000138:chemical synthesis; D014529:Uridine / Q000031:analogs & derivatives* / Q000138:chemical synthesis
chemical_list: D007202:Indicators and Reagents; D010455:Peptides; D011741:Pyrimidine Nucleosides; C002457:polyoxin; C006514:3-(3-amino-3-carboxypropyl)uridine; D014529:Uridine