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PHOTOCYCLOADDITIONS TO A PYRONE ANALOG
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UNSPECIFIED (1991) PHOTOCYCLOADDITIONS TO A PYRONE ANALOG. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 58 (3). pp. 307-314. ISSN 1010-6030.
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Abstract
Irradiation of the dicyanomethylenepyran 1 in methanol gave two dimers, 5 and 6. In the presence of ethyl vinyl ether and acrylonitrile, the major photoproducts were 9 and 12 respectively. All these results are explained by initial [2 + 2] cycloaddition to the exocyclic double bond of 1 to give cyclobutane intermediates, which undergo ring opening to highly stabilized zwitterions, followed by further reactions.
| Item Type: | Journal Article | ||||
|---|---|---|---|---|---|
| Subjects: | Q Science > QD Chemistry | ||||
| Journal or Publication Title: | JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | ||||
| Publisher: | ELSEVIER SCIENCE SA LAUSANNE | ||||
| ISSN: | 1010-6030 | ||||
| Official Date: | 10 June 1991 | ||||
| Dates: |
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| Volume: | 58 | ||||
| Number: | 3 | ||||
| Number of Pages: | 8 | ||||
| Page Range: | pp. 307-314 | ||||
| Publication Status: | Published |
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