Chelate-Size Effects on the Structures, Chemical Behavior, Properties, and Catalytic Activity of the New Palladium(II)−Allyl Complexes [Pd(η3-1-R1-C3H4){FcCH═N-CH2-(CH2)n-NMe2}][PF6] {Fc = (η5-C5H5)Fe(η5-C5H4), n = 2 or 1, and R1 = H or Ph}

Palladium-Catalyzed 1,3-Difunctionalization Using Terminal Alkenes with Alkenyl Nonaflates and Aryl Boronic Acids

A Pd-catalyzed 1,3-difunctionalization of terminal alkenes using 1,1-disubstituted alkenyl nonaflates and arylboronic acid coupling partners is reported. This transformation affords allylic arene products that are difficult to selectively access using traditional Heck cross-coupling methodologies. The evaluation of seldom employed 1,1-disubstituted alkenyl nonaflate coupling partners led to the elucidation of subtle mechanistic features of π-allyl stabilized Pd-intermediates. Good stereo- and regioselectivity for the formation of 1,3-addition products can be accessed through a minimization of steric interactions that emanate from alkenyl nonaflate substitution.