Oligometallic template strategy for ring-closing olefin metathesis: highly cis- and trans-selective synthesis of a 32-membered macrocyclic tetraoxime |
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| Authors: | Akine Shigehisa Kagiyama Satoko Nabeshima Tatsuya |
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| Institution: | Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan. |
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| Abstract: | 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. |
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