Nickel-catalyzed reductive cross-coupling of allylic difluorides with aryl iodides was achieved via allylic C−F bond activation. Based on this protocol, a series of γ-arylated monofluoroalkenes were synthesized in moderate to high yields. Mechanistic studies suggest that the C−I bonds of the aryl iodides and the C−F bonds of the allylic difluorides were cleaved via oxidative addition and β-fluorine
Described herein is a Rh-catalyzed tunable defluorinative borylation of allylic gem-difluorides to provide allylborylated and homoallylborylated monofluoroalkenes.
Herein, a palladium-catalyzed regioselective alkynylation, esterification, and amination of allylic gem-difluorides via C–F bond activation/transmetallation/β-C elimination or nucleophilic attack has been achieved. This innovative protocol showcases an extensive substrate range and operates efficiently under mild reaction conditions, resulting in high product yields and Z-selectivity. Particularly
A first example of Pd-catalyzed gem-difluoroallylation of organoborons using 3-bromo-3,3-difluoropropene (BDFP) in high efficiency with high alpha/gamma-substitution regioselectivity has been developed. The reaction can also be extended to substituted BDFPs and has advantages of low catalyst loading (0.8 to 0.01 mol %), broad substrate scope, and excellent functional group compatibility, thus providing a facile route for practical application in drug discovery and development.
Palladium-Catalyzed <i>gem</i>-Difluoroallylation Reaction between Aryltributyltin and Bromodifluoromethylated Alkenes