Preparation of 4-amino-1-naphthol ethers

Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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C514S252120, C514S628000, C514S629000, C544S165000, C544S400000, C564S221000, C564S223000

Reexamination Certificate

active

06964963

ABSTRACT:
The present invention describes a process for preparing 4-amino-1-naphthol ethers which is characterized in that naphthol ethers are first prepared from 1-naphthols, the former are then converted to the corresponding 4-acetamino-1-naphthol ethers and then the acyl group is cleaved off, and further describes 4-acetamino-1-naphthol ethers obtained thereby.

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Yokoyama, M. et al.: “Local anesthetics. II. Synthesis of the 1-alkoxynaphthylamine derivatives.” Yakugaku Zasshi, Bd. 78, 1958, Seiten 428-431, XP009002770 Seite 428; Tabelle I.
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