Abstract
Abstract The photosensitization by either [ReBr(bpy)(CO)3] or [Ru(bpy)3]2+ (bpy=2,2′-bipyridine) resulted in the isomerization of 1,1′dibenzyl-1,1′,4,4′-tetrahydro-4,4′-binicotinamide (1) and 1,1′-dibenzyl-1,1′-tetrahydro-4,6′-binicotinamide (2) to give a common mixture of 1, 2, and the diastereoisomer of 2 (3) in a 2:2:1 ratio at a photostationary state, while either direct photoexcitation or thermal activation effected only the isomerization of 2 to 1 but not at all the retro isomerization.
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