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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:
DateEvent
10 June 1991UNSPECIFIED
Volume: 58
Number: 3
Number of Pages: 8
Page Range: pp. 307-314
Publication Status: Published

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