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The intramolecular [4+2]π cycloadditions of (3-alkenyl)cyclopentadienes

✍ Scribed by Roger L. Snowden


Publisher
Elsevier Science
Year
1981
Tongue
French
Weight
392 KB
Volume
22
Category
Article
ISSN
0040-4039

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Intramolecular [3+2]-photocycloadditions
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Intramolecular [3+2] -photocyctoadditions of alkenyl methyl 1,4-naphthalenedicarboxylates, which contain rather remote alkene moieties corresponding to isobutene or a-methylstyrene, proceeded largely depending on the chain lengths to give [3+2]-adducts having nine-to eleven-membered ring systems as

Solvent Effects in [4+2] Cycloadditions
✍ Sauer, Jürgen ;Schuhbauer, Hans Markus 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 497 KB

## Abstract Relative rates of [4 + 2] cycloadditions of cyclopentadienes 1a–1e with 4‐phenyl‐1,2,4‐triazoline‐3,5‐dione (2) in 12 different solvents vary by factors of up to 19000, but the reactions show similar solvent effects. Rate constants __k__~2~ correlate well with solvent parameters __AN__