A new Co(2)(CO8-mediated tandem [5 + 1]/[2 + 2 + 1]-cycloaddition reaction: a one-pot synthesis of tricyclic delta-lactones from cis-epoxy ene-ynes |
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| Authors: | Odedra Arjan Wu Chang-Jung Madhushaw Reniguntala J Wang Su-Lein Liu Rai-Shung |
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| Institution: | Department of Chemistry, National Tsing-Hua University, Hsinchu, Taiwan, ROC. |
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| Abstract: | In the presence of Co2(CO)8 and CO, cis-epoxyalkynes bearing a tether olefin undergo a tandem 5 + 1]/2 + 2 + 1]-cycloaddition to give tricyclic delta-lactones efficiently in a one-pot operation. The reaction mechanism is proposed to involve a cobalt-coordinated cyclic allene species. |
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