Flavonoids. 41. Stereospecific synthesis of 2,3‐dihydro‐c‐3‐substituted‐t‐3‐methyl‐r‐2‐phenyl‐4H‐1‐benzopyran‐4‐ones

T. Patonay, Erzsébet Patonay‐Péli, György Litkei, László Szilágyi, G. Batta, Z. Dinya

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The synthesis of 2,3‐dihydro‐t‐3‐mesyloxy‐c‐3‐methyl‐r‐2‐phenyl‐4H‐1‐benzopyran‐4‐one (1) is described. The reaction of mesylate 1 with various nucleophiles, first of all O‐ and N‐nucleophiles, yields the corresponding 2,3‐dihydro‐c‐3‐substituted‐t‐3‐methyl‐r‐2‐phenyl‐4H‐1‐benzopyran‐4‐ones 2b, 7b, 9, 10, 12, 14 and 18. Azide 14 is a useful intermediate for the synthesis of flavonoids 15–17.

Original languageEnglish
Pages (from-to)343-347
Number of pages5
JournalJournal of Heterocyclic Chemistry
Issue number1
Publication statusPublished - 1988


ASJC Scopus subject areas

  • Organic Chemistry

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