PHOTOCYCLOADDITIONS TO A PYRONE ANALOG
UNSPECIFIED. (1991) PHOTOCYCLOADDITIONS TO A PYRONE ANALOG. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 58 (3). pp. 307-314. ISSN 1010-6030Full text not available from this repository.
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|
|Date:||10 June 1991|
|Number of Pages:||8|
|Page Range:||pp. 307-314|
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