Iridium(III) Catalyzed <i>Z</i>‑Selective Allylic Arylation of α‑Fluoro But-1-enoic Acid Amides via β‑F-Elimination in Water

Allylic arylation of α-fluoro but-1-enoic acid amides with arylboronic acids was carried out in water by comparing the catalytic activity of iridium­(III) and rhodium­(III). Ir­(III) has shown a strong superiority over Rh­(III) to give allyl-aryl coupling products with excellent stereoselectivity in favor of the Z-isomer. The origin of high stereoselectivity is perhaps because of the a coordination of iridium Ir–N or Ir–O.