Synthesis of small and medium sized 2,2-disubstituted lactams via the “intramolecular” three component Ugi reaction
摘要:
A series of small and medium sized lactams were synthesized through the use of tethered keto-acids in an ''intramolecular'' multicomponent Ugi type reaction. This chemistry afforded five-, six-, seven- and eight-membered lactams in good yields. (C) 1997 Elsevier Science Ltd.
Five- and six-memberedlactams were synthesized via a 4-center 3-component Ugi reaction by combining amines, isocyanides, and ketoacids under solvent-free microwave conditions. The reaction was carried out in much shorter times and the yields were improved in comparison to classical conditions.