Liquid-Phase Combinatorial Synthesis of Alicyclicβ-Lactams via Ugi Four-Component Reaction

Abstract
Alicyclic β-lactams were successfully synthesized via a parallel liquid-phase Ugi four-center three-component reaction (U-4C-3CR), starting from alicyclic β-amino acids such as cis-2-aminocyclohexanecarboxylic acid, cis-2-aminocyclopentanecarboxylic acid, 2,3-diexo-3-aminobicyclo[2.2.1]heptane-2-carboxylic acid and some of their partially unsaturated analogues. A six-membered mixture-based combinatorial library of β-lactams was also generated.