One-Pot Synthesis of Fluorovinyl Acetates and β,β -Difluoro Carboxylates from a Hypervalent Iodine and Hydrogen Fluoride-Based Fluorination Reagent

Hypervalent iodine(iii)-mediated ring-expansive difluorination of alkynylcyclopropanes en route to the synthesis of difluorinated alkylidenecyclobutanes

Reported herein is a hypervalent iodine(iii)-mediated ring-expansive difluorination of alkynylcyclopropanes featuring a Wagner–Meerwein-type rearrangement to access a variety of difluorinated alkylidenecyclobutanes.

Cu-catalyzed C(sp2)-N-bond coupling of boronic acids and cyclic imides

A general Cu-catalyzed strategy for coupling cyclic imides and alkenylboronic acids by forming C(sp²)-N-bonds is reported. The method enables the practical and mild preparation of (E)-enimides. A large range of cyclic imides are allowed, and di- and tri-substituted alkenylboronic acids can be used. Full retention was observed in the configuration of the alkene double bond in the coupled products. The method is also applicable for preparing N-arylimides, using arylboronic acids as coupling partners. The usefulness of this strategy is exemplified by the convenient derivatization of the chemotherapy medication 5-flurouracil, the nucleoside uridine and the anti-epileptic drug phenytoin.

Oxidative trifluoromethylation and fluoroolefination of unactivated olefins

Fluorine-containing organic compounds are gaining increasing importance in medicinal chemistry.