Abstract
Diene condensation of cyclopentadiene with 2-substituted allylacetylenes occurs nonselectively at a double and triple bonds; therewith the dienophile activity grows in parallel with the electron-withdrawing properties of the substituent. Depending on electronic character of functional groups the reaction proceeds as “neutral” diene synthesis. The relative activity of cyclopentadiene and 1,3-cyclohexadiene in reactions with allylacetylenes is essentially governed by the different distance between the 1,4-reactive sites in these systems.
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Veliev, M.G., Chalabieva, A.Z., Shatirova, M.I. et al. Diene Condensation of Cyclopentadiene with Dienophiles of Allylacetylene Series. Russian Journal of Organic Chemistry 39, 825–830 (2003). https://doi.org/10.1023/B:RUJO.0000003159.15212.50
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DOI: https://doi.org/10.1023/B:RUJO.0000003159.15212.50