## Abstract In Order to decrease the ground state reactivity and increase their potential for [3+2] cycloadditions, cyanoβ and methoxyβcarbonylβsubstituted nitrones 1a and 1b, respectively, were prepared and irradiated in the presence of electronβrich alkenes such as 2 to afford the corresponding o
Photocycloaddition of 2-acetylnaphthalene to methyl cinnamate. A 2 + 4 electron photocycloaddition
β Scribed by Arnold, D. R.; Gillis, L. B.; Whipple, E. B.
- Book ID
- 121758025
- Publisher
- Royal Society of Chemistry
- Year
- 1969
- Weight
- 268 KB
- Volume
- 16
- Category
- Article
- ISSN
- 0577-6171
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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
4.n]Metacyclophanes 6 (n = 2 -6), [4.n]paracyclophanes 7 (n = 3 -6), [4~1](4,4')biphenylophanes 8 (n = 3, 4), and C2.3.2.41paracyclophane 9 were obtained from appropriate 1,2-ethano-[2.n]cyclophanes 1 -5 by Birch reduction. Some strained cyclophanes, like la, lb, and 2a, gave linear open-chain compo
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