Die Umsetzung der Aminodiphenyläther (I) mit aromatischen Aldehyden wie z.B. (II) in Benzol führt zu den Azomethinen (III), die ohne Isolierung mit überschüssiger Thioglykolsäure (IV) zu den Titelverbindungen (V) cyclisiert werden.
Treatment of the benzoxazines (I) with gaseous or aqueous ammonia yields the amides (II) (if methanol is used as solvent, the corresponding methyl esters are formed as by‐products).
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