Abstract
4,4-Dich1oro-2-cyclobutenones 1, available by cycloaddition of acetylenes to dichloroketene, can be photolyzed in the presence of olefins or dienes to produce regiospecifically 2-vinylcyclobutanones 3-11. The photochemical reaction succeeds even in some cases where thermolysis fails and was shown to proceed by electrocyclic ring opening to a vinylketene. Stereochemically the results of photolysis of 1 differ from thermolysis with identical olefinic substrates.
Original language | English |
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Pages (from-to) | 6389-6392 |
Number of pages | 4 |
Journal | Tetrahedron Letters |
Volume | 27 |
Issue number | 52 |
DOIs | |
State | Published - 1986 |
Bibliographical note
Funding Information:Support of this research by a grant from the Israel Academy of Sciences