2-Ethenyl-1H-imidazoles 6 were readily prepared by treating 2-(1-hydroxyalkyl)-1H-imidazoles 5 with hot acetic anhydride. Several convenient procedures to precursors of 6 are described.
A radical-based asymmetric olefin difunctionalization strategy for rapidly forging all-carbon quaternarystereocenters α to diverse azaarenes is reported. Under cooperative photoredox and chiral Brønsted acid catalysis, cyclopropylamines with α-branched 2-vinylazaarenes can undergo a sequential two-step radical process, furnishing various valuable chiral azaarene-substituted cyclopentanes. The use