Photochemistry of Flavonoids. V. Photocyclization of 2-Styryl-4H-chromen-4-ones

Irradiation of 2-styryl-4H-chromen-4-ones (1) with a high pressure Hg lamp at room temperature under air gave benzo [α] xanthones (2). The cyclization of methoxy-substituted styrylchromones occurred at the para position relative to the OMe group on the styryl ring, whereas 2-[β-(2-naphthyl) vinyl] c...

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Published inChemical & pharmaceutical bulletin Vol. 29; no. 9; pp. 2670 - 2674
Main Authors HIGUCHI, KYOKO, YOKOE, ICHIRO, KOMATSU, MANKI, SHIRATAKI, YOSHIAKI
Format Journal Article
LanguageEnglish
Published Tokyo The Pharmaceutical Society of Japan 1981
Japan Science and Technology Agency
Subjects
polyaromatic xanthene derivatives
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ISSN0009-2363
1347-5223
DOI10.1248/cpb.29.2670

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Summary:Irradiation of 2-styryl-4H-chromen-4-ones (1) with a high pressure Hg lamp at room temperature under air gave benzo [α] xanthones (2). The cyclization of methoxy-substituted styrylchromones occurred at the para position relative to the OMe group on the styryl ring, whereas 2-[β-(2-naphthyl) vinyl] chromone (3) cyclized at the α-position of the naphthalene ring.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:0009-2363
1347-5223
DOI:10.1248/cpb.29.2670