“…8,9 In contrast with the diene RCM, it is achieved from readily available ene-arylketones, or more recently using aliphatic ketones, 10 using simple Lewis acids. Iron(III) complexes have been especially utilized for that purpose, mostly by Schindler et al 9,10 Due to our interest in the development of galliumcatalyzed transformations, 11 and our recent work on the gallium-catalyzed transfer hydrogenation of alkenes using 1,4-cyclohexadiene as hydrogen donor, 12,13 we decided to investigate a tandem process combining a carbonyl-olefin metathesis and a transfer hydrogenation to form cycloalkanes (Scheme 1B). We kept in mind that the judicious installation of substituents (R 1 and R 2 ) could allow the formation of two contiguous stereocenters and possibly address the issue of the formation of 1,2-cis-disubtituted cyclopentanes.…”