Title:
6-BROMO-2-NAPHTHOIC ACID PRODUCTION METHOD
Document Type and Number:
WIPO Patent Application WO/2014/069674
Kind Code:
A1
Abstract:
Provided is method of producing 6-bromo-2-naphthoic acid useful as a raw material in pharmaceuticals, agricultural chemicals, etc. This 6-bromo-2-naphthoic acid production method involves reacting 6-hydroxy-2-naphthoic acid with ammonia in the presence of sulfite or bisulfite to obtain 6-amino-2-naphthoic acid, subjecting the obtained 6-amino-2-naphthoic acid to a diazotization reaction to obtain a diazotized compound, and subsequently reacting the diazotized compound with copper bromide in the presence of an acid. By means of the present invention, it is possible to produce 6-bromo-2-naphthoic acid with high yield and high purity at low cost.
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Inventors:
MINEYAMA KENJI (JP)
TACHIBANA SATOSHI (JP)
MIYAGI KOUJI (JP)
NISHINO MITSUHIRO (JP)
SURUGA TOSHIHIDE (JP)
TACHIBANA SATOSHI (JP)
MIYAGI KOUJI (JP)
NISHINO MITSUHIRO (JP)
SURUGA TOSHIHIDE (JP)
Application Number:
PCT/JP2013/080361
Publication Date:
May 08, 2014
Filing Date:
October 31, 2013
Export Citation:
Assignee:
SUGAI CHEMICAL IND CO LTD (JP)
International Classes:
C07C51/363; C07C63/70; C07C63/36
Foreign References:
| JPS60500815A | 1985-05-30 | |||
| JPH05502469A | 1993-04-28 |
Other References:
EDITED BY CSJ: "The Chemical Society of Japan, Kagaku Benran Kiso-hen, revised 5th edition", KAGAKU BENRAN KISO-HEN, REVISED 5TH EDITION,UZEN CO., LTD, 20 February 2004 (2004-02-20), pages II-423
KARISHIN, A. P.: "Halo-8-nitro-1-naphthoic acids", ZHURNAL OBSHCHEI KHIMII, vol. 33, no. 7, 1963, pages 2247 - 2250
EDITED BY CSJ: "The Chemical Society of Japan, Shin Jikken Kagaku Koza 14", SHIN JIKKEN KAGAKU KOZA, MARUZEN CO., LTD, vol. 14, 20 February 1978 (1978-02-20), pages 1356 - 1357
KARISHIN, A. P.: "Halo-8-nitro-1-naphthoic acids", ZHURNAL OBSHCHEI KHIMII, vol. 33, no. 7, 1963, pages 2247 - 2250
EDITED BY CSJ: "The Chemical Society of Japan, Shin Jikken Kagaku Koza 14", SHIN JIKKEN KAGAKU KOZA, MARUZEN CO., LTD, vol. 14, 20 February 1978 (1978-02-20), pages 1356 - 1357
Attorney, Agent or Firm:
HIROSE, TAKAYOSHI (JP)
Takami Hirose (JP)
Takami Hirose (JP)
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