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Anthocyanidins and related compounds—XVII : Reactions of flavylium salts and 2-hydroxychalcones with hydroxylamine and hydrazine

✍ Scribed by L. Jurd

Book ID
103393200
Publisher
Elsevier Science
Year
1975
Tongue
French
Weight
475 KB
Volume
31
Category
Article
ISSN
0040-4020

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## Abstract 2‐Aryl‐4‐methoxy‐9‐oxocyclohepta[__b__]pyrylium perchlorates 1a‐c reacted with hydroxylamine hydrochloride and hydrazine sulfate in the presence of triethylamine to afford 2‐aryl‐4,9‐dihydrocyclohepta[__b__]pyran‐4,9‐dione 4‐oximes 3a‐c and 4‐hydrazones 4a‐c in good yields, respectively