A new synthesis of 2,2β²-dialkylchrom-3-e
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Alessandro Bongini; Giuliana Cardillo; Mario Orena; Gianni Porzi; Sergio Sandri
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Article
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1979
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Elsevier Science
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French
β 216 KB
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 Bow