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The first intermolecular 2+2 photocycloadditions of 2,5-cyclohexadien-1-ones to alkenes
โ Scribed by Arthur G Schultz; Arthur G Taveras
- Publisher
- Elsevier Science
- Year
- 1988
- Tongue
- French
- Weight
- 197 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
The type A photorearrangement of 2,5-cyclohexadien-l-ones to bicycloC3.l.Olhex-3-en-2-ones normally occurs with high quantum efficiency. However, we have recently reported1 the first examples of the intramolecular 2+2 photocycloaddition of 4-(3'-alkenyl)-and 4-(3'-pentynyl)-
๐ SIMILAR VOLUMES
A synthetically useful C-C bond formation involving the photochemical addition of quinoxaline-2( 1 H )thiones to alkenes is described. Irradiation of the quinoxaline-2(1H)-thiones 1 4 in the presence of the alkenes 7 gave the 2-(2'-mercaptoalkyl)quinoxalines 8 1 1 in moderate-to-good yields via ring
## Abstract On irradiation (350โ nm) in the presence of 2,3โdimethylbutaโ1,3โdiene, benzoxepinone **2** and dioxepinone **3** were converted regioโ and diastereoselectively to __trans__โfused oxabicyclo[5.2.0]nonanones **5** and **9**, respectively.