Title:
MANUFACTURE OF 6-HYDROXY-2-NAPHTHONE
Document Type and Number:
Japanese Patent JPS62286948
Kind Code:
A
Abstract:
A process is provided for the production of 6-hydroxy-2-naphthones, e.g., 6-hydroxy-2-acetonaphthone by contacting a 2-naphthyl carboxylate ester, e.g., 2-naphthyl acetate with at least 20 moles of hydrogen fluoride per mole of 2-naphthyl ester, at reaction temperatures, e.g., 0 tg. 100 DEG C for a period of reaction, e.g., 30 minutes to 8 hours sufficient to produce the desired amount of 6-hydroxy-2-naphthone. The process may utilize a carboxylic acid or anhydride, e.g., acetic acid or anhydride as an additive for the purpose of further increasing the regioselectivity of the 6-hydroxy-2-naphthone product. The process is capable of being carried out at a conversion of 2-naphthyl ester of at least 90% and a regioselectivity to 6-hydroxy-2-naphthone of at least 90 mol%.
Inventors:
KENESU JII DABENPOOTO
Application Number:
JP12607487A
Publication Date:
December 12, 1987
Filing Date:
May 25, 1987
Export Citation:
Assignee:
HOECHST CELANESE CORP
International Classes:
B01J27/00; B01J27/06; C07C45/00; C07B61/00; C07C45/51; C07C45/54; C07C49/83; C07C67/00; (IPC1-7): B01J27/06; C07C45/51; C07C49/83
Attorney, Agent or Firm:
Takehiko Saito
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