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.
在无环
二烯丙基衍
生物H4L的闭环烯烃复分解中,观察到寡
金属模板作用对32元大环四
肟的顺/反选择性的影响。异三核配合物LZn2M(M = Ca2 +,La3 +)的易位提供了顺式异构体,而未配合的H4L提供了反式异构体。