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A new synthesis of 2,2′-dialkylchrom-3-enes and flav-3-enes

✍ Scribed by Alessandro Bongini; Giuliana Cardillo; Mario Orena; Gianni Porzi; Sergio Sandri

Publisher
Elsevier Science
Year
1979
Tongue
French
Weight
216 KB
Volume
20
Category
Article
ISSN
0040-4039

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✦ Synopsis

N-iodosuccinimide (NIS) induces cyclization of substituted 2-allylphenols to 3-iodochromanes which may be dehydrohalogenated to the corresponding chrom-3-enes. Almost every class of natural phenolic compounds contains examples of sub-1 stances with 2,2'-dialkylchromene rings . Recently Pratt and Bowers 2 found that chromene derivatives, Precocene I and II, extracted from the plant Ageratum

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