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Photochemical Cycloaromatization of Non-Benzenoid Enediynes
Toshio Kaneko1, Miki Takahashi1, Masahiro Hirama1
1Department of Chemistry, Graduate School of Science, Tohoku University (and) CREST, Japan Science and Technology Corporation (JST), Sendai 980-8578 (Japan), Fax: (+81) 22-217-6566.
Abstract:
An efficient photo-Bergman reaction of aliphatic enediynes has been realized. Photolysis of 1 results in the formation of 4 in good yields along with [D2 ]3. Enediyne 4, which has never been isolated in the thermal reaction of 1, arises here by a retro-Bergman reaction of the diradical intermediate 2.
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