Lewis acid catalyzed stereoselective ene addition of formaldehyde to 1,3-diarylcyclopentenes - synthesis of trans-2,5-diaryl-2-cyclopentene-1-methanols
UV-laser photochemistry of azoalkanes: surprising effects of phenyl substitution on the lifetimes of 1,3-cyclopentanediyl and 1,4-cyclohexanediyl triplet diradicals
A Ni0-catalyzed rearrangement of 1,2-disubstituted 1-vinylcyclopropanes was studied. Either of the two product isomers, 1,4- or 1,5-disubstituted cyclopentenes, was selectively obtained depending on the choice of ligands. Experimental and computational investigations of the reaction revealed a clear insight into the origin of such high product selectivity.