Synfacts, Table of Contents Synfacts 2025; 21(12): 1248DOI: 10.1055/a-2720-6809 Organo- and Biocatalysis N-Heterocyclic Carbene Enabled Umpolung Strategy for Constructing Rigid Bicyclic Scaffolds Authors Contributor(s): Benjamin List Peng-Cheng Yu Recommend Article Abstract Buy Article(opens in new window)Keywords Keywordsbicyclo[1.1.0]butanes - umpolung activation - N-heterocyclic carbenes - Breslow intermediate Full Text