Inorganic Chemistry, Vol.46, No.23, 9525-9527, 2007
Oligometallic template strategy for ring-closing olefin metathesis: highly cis- and trans-selective synthesis of a 32-membered macrocyclic tetraoxime
An oligometallic template effect was observed on the cis/trans selectivity of a 32-membered macrocyclic tetraoxime in ring-closing olefin metathesis of an acyclic diallyl derivative H4L; the metathesis of heterotrinuclear complex LZn2M (M = Ca2+, La3+) afforded the cis isomer, whereas uncomplexed H4L gave the trans isomer.