Cycloadditions of vinylketenes and ethoxyacetylene |
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| Authors: | James D. Wuest |
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| Affiliation: | Department of Chemistry, Harvard University, Cambridge, MA 02138, U.S.A. |
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| Abstract: | Two major adducts are formed when diarylketenes react with ethoxyacetylene: cyclobutenones, produced by 2+2 cycloadditions characteristic of all ketenes, and norcaradienes, the unexpected products of 2+2+2 cycloadditions. Simpler vinylketenes in which the vinyl group is not incorporated in an aromatic ring yield only products derived from 2+2 cycloadditions. |
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