Journal of Photosciences
Photochemistry of ¥á, ¥á-Dihalovalerophenones
Volume 11(2004), 75-76 page
ÀúÀÚ: Sungsu Cho and Bong Ser Park
11-2-75.pdf (36.8K)
Keywords:
Yang photocyclization substituent effects Photochemistry of ¥á ¥á-Dihalovalerophenones
¥á,¥á-Dibromovalerophenone and ¥á,¥á-dichlorovalerophenone were prepared and their photochemical behaviors were investigated. The former gives C-Br cleavage products and the latter gives mainly the Yang photocyclization products upon irradiation. The reactivity of the chlorine substituted ketone turned out to be quite different from that of ¥á,¥á-difluorovalerophenone which gives both the cyclization and elimination products from the 1,4-biradical intermediate.
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