Journal
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
Volume 68, Issue 7, Pages 1334-1338Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jccs.202000482
Keywords
chalcone; Claisen‐ Schmidt condensation; flavone; iodine‐ mediated cyclization
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Funding
- Ministry of Science and Technology of Taiwan [MOST109-2113-M-032-003]
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This study discussed the synthesis of flavones from chalcones via iodine-mediated cyclization, and the unusual ring oxidative cyclization from C-2-OH-chalcones under the same condition. Different results were found and the mechanisms were discussed in detail.
Synthesis of flavones from chalcones via the iodine-mediated cyclization required at least one hydroxy group at their C-2 '-positions. On the contrary, the ring oxidative cyclization from C-2-OH-chalcones under the same condition was unusual and reported only once. We evaluated the aforementioned method and found different results. The mechanisms in detail were discussed.
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