Cumulenes, long regarded as exotic curiosities, reveal remarkable versatility as nucleophiles, electrophiles, and dienophiles, enabling diverse transformations and offering powerful tools for modern organic synthesis.
A systematic inverse design protocol uncovers fulvene derivatives as promising singlet fission chromophores, leveraging their aromatic chameleon behavior and key substitution patterns to optimize excited-state energies for SF-enhanced solar cells.
A transformation of spiro[4.4]nonatrienes to aryl-substituted, enantioenriched annulated fulvenes is reported. DFT calculations and empirical results support a novel mechanism of reaction involving a 1,5-vinyl shift from a vinyl–palladium species.
Sulfur-substituted fulvenes have been synthesized from 1,3-dien-5-ynes via a gold-catalyzed 5-exo-dig cyclization. Activation by the gold and Brønsted acid catalysts generates fulvenium ions, enabling one-pot reaction with indoles.
We report di- and trinuclear sandwich complexes of cross-π-conjugated fulvenes. The reversible extrusion of a Pd atom from inside to outside the sandwich framework occurs due to the cross-π-conjugation of fulvene.