On the mechanism of the photoisomerization reaction of aryl substituted indenes
β Scribed by Albert Padwa; Steven Goldstein; Roman Loza; Mitchell Pulwer
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- French
- Weight
- 198 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0040-4039
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β¦ Synopsis
The mechanism of the phototransposition reaction of a number of arylalkyl substituted indenes has been found to be markedly dependent on the nature and location of the substituent groups. Considerable interest has been focused in recent years on phototransposition reactions which have the net effect of interchanging atoms within a five-membered ring'. Examples have been reported for variously substituted heterocycles2 and cyclopentadiene derivatives3. Bicyclo[2.l.O]pent-2-enes and 3-vinylcyclopropene analogs are the most commonly invoked intermediates responsible for these rearrangements; in some instances, such molecules have been detected and characterized.' Recently, we described the photochemical rearrangement of indenes
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Further work needs to be done in order to establish this ooint.
π SIMILAR VOLUMES
During the course of our studies dealing with the photochemical transformations of small ring compounds, we uncovered an unusual substituent effect on the mode of ring opening of an unsymmetrically substituted cyclopropene. 192 Thus, the major product obtained from the irradiation of 1 was derived f
Photoisomerization of the title compound proceeds via formation of a ketene and rotation about a single bond followed by intramolecular cyclization.
Gencralizcd Hartrce-Fock (CHF) calculations Indicate that the aromatic substitutiou reaction kr the ground state CXI bc classified into three types: (A) nonradical ionic (S N2, SE2) reaction, where the closed-shell character is always retained; (B) electron-transfer type I (ET I) reaction, where the